Backend Development is a critical part of any website or software product. It starts with understanding the client's goals and developing solutions that achieve those goals in a cost-effective and scalable way. Backend developers are responsible for more than just code: they have to have a strong understanding of databases, frameworks, and development in general. A backend developer uses this knowledge to turn complicated customer requirements into a efficient, automated solutions that the user experience (UX) team can work with.

When it comes to Backend Development, experience matters - you want someone who's seen a variety of projects and knows the best technology to use for your specific scenario.

Here's some projects that our expert Backend Developer made real:

  • Developing connected systems between websites and local servers
  • Integrating software systems using modern real-time protocols
  • Building bespoke solutions tailored to customer requirements
  • Taking over existing projects and resolving tricky bugs
  • Developing custom solutions using tried and tested frameworks

Backend Development encompasses a wide variety of skills and technologies, so it helps to have an experienced developer on your team who can navigate the complexities of building high-quality solutions. Our expert developers have already undertaken a variety of different projects and can jump into yours with confidence - benefit from their expertise, get your project completed quickly and correctly, and reduce time-to-market for your product. Get in touch today to discuss bringing your project to life, or post your own project in Freelancer.com to hire an experienced Backend Developer.

Conform celor 146,612 recenzii, clienții îi evaluează pe Backend Developers cu 4.9 din 5 stele.
Angajează Backend Developers

Backend Development is a critical part of any website or software product. It starts with understanding the client's goals and developing solutions that achieve those goals in a cost-effective and scalable way. Backend developers are responsible for more than just code: they have to have a strong understanding of databases, frameworks, and development in general. A backend developer uses this knowledge to turn complicated customer requirements into a efficient, automated solutions that the user experience (UX) team can work with.

When it comes to Backend Development, experience matters - you want someone who's seen a variety of projects and knows the best technology to use for your specific scenario.

Here's some projects that our expert Backend Developer made real:

  • Developing connected systems between websites and local servers
  • Integrating software systems using modern real-time protocols
  • Building bespoke solutions tailored to customer requirements
  • Taking over existing projects and resolving tricky bugs
  • Developing custom solutions using tried and tested frameworks

Backend Development encompasses a wide variety of skills and technologies, so it helps to have an experienced developer on your team who can navigate the complexities of building high-quality solutions. Our expert developers have already undertaken a variety of different projects and can jump into yours with confidence - benefit from their expertise, get your project completed quickly and correctly, and reduce time-to-market for your product. Get in touch today to discuss bringing your project to life, or post your own project in Freelancer.com to hire an experienced Backend Developer.

Conform celor 146,612 recenzii, clienții îi evaluează pe Backend Developers cu 4.9 din 5 stele.
Angajează Backend Developers

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    This is a simple 2FA system. I have a landing page that is 100% functional and working. Google authentication and the magic token are also 100% functional and working. I would like to add some functions to the main screen and improve the layout. Instead of just the website name, include a logo or icon to make it easier to identify. Include a tagging system to facilitate the organization of tokens (e.g., financial, social media, email, etc.), similar to a CRUD, where the user will define their own tags. The boxes with the codes can be adjusted by dragging and dropping for free organization. Create a Google Chrome extension that uses the same login as the website and synchronizes these tokens. The application is currently being tested at idlock com br if you'd like to explore it an...

    $179 Average bid
    $179 Oferta medie
    123 oferte

    My in-house software engineer has brought our short-video social app to a functional beta, but we still need polish and rock-solid stability before launch. I’m looking for a collaborator who can jump in quickly and help us close the remaining gaps in two areas: 1. User Interface • Refine design elements so every screen feels consistent, modern and on brand • Tighten the navigation flow from feed to profile, camera, and discovery to keep interactions friction-free • Implement responsive user-feedback mechanisms (loading states, haptics, subtle animations) that make the experience feel as snappy as TikTok 2. Backend Integration • Harden database connections and optimise queries for real-time feed loading • Clean up API handling, ensurin...

    $801 Average bid
    $801 Oferta medie
    92 oferte
    Real Estate Auction App
    6 zile left
    Cont confirmat

    I need a complete mobile application—Android and iOS—that lets private sellers list property either at a fixed price or in an auction format, much like eBay but strictly for real estate. Core flow • New users sign up with phone number verification only or social logins . • A seller chooses a package (Bronze, Silver, Gold or Platinum) before every listing, then uploads photos, videos, documents and a written description. • Buyers browse listings through search filters for price range, location and property type, switch between fixed-price and auction tabs, and place bids or make direct offers. • In-app chat and one-tap call buttons connect buyers and sellers instantly. I want a clean, modern UI, real-time bid updates, push notifications and a lightw...

    $1725 Average bid
    $1725 Oferta medie
    146 oferte

    StructAI – Full Application Concept and Workflow StructAI is a mobile-first web application designed to automate the preliminary structural design of low-rise reinforced concrete buildings by integrating urban planning logic, structural modeling, ETABS analysis, AutoCAD documentation, and SAFE verification into a single intelligent workflow. The goal of the application is to allow a user to define a site and building concept through a simple interface, and then automatically generate a context-aware structural design package without manual modeling. ⸻ User Interface and Project Input The application begins with a step-by-step interface where the user enters project data. The app collects: • Location and city • District or context type (heritage, dense urban, suburba...

    $1103 Average bid
    $1103 Oferta medie
    58 oferte

    Building a simplified AI-powered CV generator web app for a university pilot program. Students will be able to: • Log in using their school email (magic link, restricted domain) • Upload their CV (PDF) • Automatically extract and structure their profile (experience, education, skills, languages) • Edit and complete their profile • Paste a job offer (text or link) • Generate an adapted CV based on the job requirements • Generate a tailored cover letter • Preview the result • Export a clean professional PDF This is a closed Proof of Concept for partner schools. No payments, no subscriptions, no mobile app at this stage. Preferred stack: + simple backend (Node/Supabase) + OpenAI + HTML-to-PDF generation. Clean, documented, fully transferable ...

    $4435 Average bid
    $4435 Oferta medie
    73 oferte
    App zur Brotbestellung entwickeln
    6 zile left
    Cont confirmat

    Ich suche Unterstützung, um eine schlanke App zu erstellen, über die unsere Gäste und Kunden Brot bestellen können – möglichst einfach per Smartphone oder über den Touchscreen‐Kiosk im Lokal. Kernfunktionen • QR-Code-Download: Die App soll sich per Scan direkt aus dem Store installieren lassen, sodass der Einstieg für neue Nutzer mühelos ist. • Einfache Bestellung: Kunden wählen ihre Brotsorten, legen Menge und Extras fest und schließen den Vorgang in wenigen Klicks ab. • Abholort wählen: Entweder Lieferung an den Tisch (Eingabe von Tisch­nummer + Name) oder Abholung an einem unserer festen Pick-up-Points auf Gran Canaria. • Zahlungsarten: Barzahlung, PayPal, Kreditkarte sowie optional weitere g&au...

    $932 Average bid
    $932 Oferta medie
    23 oferte

    I’m looking for a website developer with experience in AI-powered platforms to build a personal branding website with specific functionality. Website Structure I need a clean, modern website with three main pages: About Me – Personal brand story – Professional background – Mission and positioning Articles – Blog-style layout – Easy publishing and editing – Organized by categories/tags Tools (Main Feature) This is the most important part of the website. AI Tools Page – Core Requirement I want to create custom AI text-based tools that I can build and manage myself without needing a programmer each time. Key Requirements: The tools must be text-based only (no image, audio, or video generation). Each tool should function like a digital product...

    $158 Average bid
    $158 Oferta medie
    149 oferte

    Freelancer Job Post (Timuro Inc.) Title: WordPress Developer Needed for Custom Multi-Page Website Build (PSD Designs Provided / No Elementor) ________________________________________ Project Description Timuro Inc. is looking for an experienced WordPress developer to build a modern, professional company website (approximately 10–15 pages) using custom WordPress development in PHP. This is a structured implementation project: we will provide complete page designs as PSD files, and the developer will be responsible for translating those designs into a responsive, high-quality WordPress site. We are seeking a clean, performance-focused build — not a site created using drag-and-drop page builders. ________________________________________ Scope of Work • Convert provided PSD d...

    $1042 Average bid
    Recomandat
    $1042 Oferta medie
    244 oferte

    Freelancer Job Post (Timuro Inc.) Title: WordPress Developer Needed for Custom Multi-Page Website Build (PSD Designs Provided / No Elementor) ________________________________________ Project Description Timuro Inc. is looking for an experienced WordPress developer to build a modern, professional company website (approximately 10–15 pages) using custom WordPress development in PHP. This is a structured implementation project: we will provide complete page designs as PSD files, and the developer will be responsible for translating those designs into a responsive, high-quality WordPress site. We are seeking a clean, performance-focused build — not a site created using drag-and-drop page builders. ________________________________________ Scope of Work • Convert provided PSD d...

    $1023 Average bid
    $1023 Oferta medie
    283 oferte

    I need a developer to create a live payment tracking dashboard using the Paytm Webhook API. The dashboard will display successful payments. Requirements: - Payment amount - Customer name - Total payment history for each customer No user authentication is required for dashboard access. Ideal skills and experience: - Proficient with Paytm API and webhooks - Strong backend development skills - Experience in building real-time data dashboards - Familiarity with database management to track payment histories Looking for a reliable freelancer who can deliver this project within budget and on time.

    $269 Average bid
    $269 Oferta medie
    25 oferte

    I’m ready to take my service-based business online and I need everything built from the ground up—the web platform and companion mobile apps. The scope covers both the backend and frontend of the website, any essential plug-ins, plus fully fledged iOS and Android applications that mirror the web experience. The core of the project is an online booking system. Clients must be able to see real-time availability, reserve a slot, and pay securely on the spot. Calendar integration, automated reminders, and payment processing are must-haves, not nice-to-haves. Here’s how I picture the rollout: • Responsive service website (frontend + backend) • Integrated booking engine with calendar sync, instant payments, and reminder automation • Native or cross-platfor...

    $153 Average bid
    $153 Oferta medie
    32 oferte

    Hi — we need urgent help with an existing mobile app project. We have a live Android and iOS app but lost access to the original source code. We only have APK builds and backend/admin access. We need an experienced developer who can recover from apk's etc and stabilize the project. We have a live Android and iOS app where the previous developer became unreachable. The client has full access to Firebase backend and Google Play/App Store accounts, but we don’t have the original frontend source code. We do have APK/build files and admin access. There is a critical login issue affecting users that needs immediate stabilization. After that, we want to rebuild a proper development pipeline and recover the project long-term. We’re looking for someone experienced in app ...

    $90 Average bid
    $90 Oferta medie
    19 oferte

    Looking to build a mobile app with the following: (Dallas/, Texas based with intentions to expand thought USA) PetGet – Platform Overview for Development PetGet is a DFW-focused pet community platform that combines a peer-to-peer marketplace, a business directory, and event discovery for pet owners and pet-related businesses. Core Purpose PetGet allows pet owners in the DFW metroplex to buy and sell used pet supplies locally and discover trusted pet-related businesses and local events, all within one streamlined platform. How long would it take to produce the app and how much would it cost? Thank you!

    $2297 Average bid
    $2297 Oferta medie
    261 oferte

    Socifi, our real-time Texas Hold’em poker web app, already has the core game loop, React lobby and table UI, and working game logic. The missing piece is a solid back end that persists data and ties everything together. What needs doing right away • Re-enable and wire up MongoDB so user profiles, game states (hands, pots, blinds, results), and transaction/payment records are stored, queried, and indexed efficiently. • Patch the current authentication flow so sign-up, login, and token refresh are reliable across reconnects and multiple tabs. • Activate or complete the half-finished features in the existing codebase (e.g., player avatars, hand history modal, chip top-up) and remove unused remnants. • Prepare environment variables, seeding scripts, and pr...

    $7461 Average bid
    $7461 Oferta medie
    73 oferte

    Job Title: Freelance Golang Developer (Live Streaming Platform) Description: We are looking for an experienced Freelance Golang Developer to help build and optimize a high-performance live creation/live streaming platform. The ideal candidate should have strong backend development skills and experience handling real-time systems. Responsibilities: - Develop and maintain backend services using Golang - Build scalable APIs for live streaming features - Optimize performance for real-time data handling - Work with databases, sockets, and third-party SDK integrations - Ensure smooth and low-latency live streaming experience Requirements: - Strong experience in Golang development - Experience with real-time applications (live streaming, chat, gaming, etc.) - Knowledge of R...

    $260 Average bid
    $260 Oferta medie
    22 oferte

    I’m ready to add a brand-new feature to my product and have a clear, concise brief that I’ll share as soon as we start talking. The core objective is straightforward: design and implement this feature from the ground up, integrating it cleanly with the existing codebase and ensuring it works seamlessly for end-users. Because the platform can still be decided—whether web, mobile, or desktop—I’m open to your recommendations on the most effective stack and architecture. What matters most is clean, maintainable code, solid documentation, and a smooth hand-off so my in-house team can continue iterating afterward. Deliverables: • Fully functional feature merged into a Git-based repo • Inline and external documentation covering setup, usage, and edge-ca...

    $19 / hr Average bid
    $19 / hr Oferta medie
    149 oferte
    Real-Time Trading Platform Development
    6 zile left
    Cont confirmat

    Project Description: We are looking for an experienced developer or team to work on a real-time trading platform. Important: Only apply if you have previously developed a live, working trading project. Proof of authenticity is required. Requirements: in developing real-time trading systems with live market data APIs or low-latency data streaming experience execution system implementation authentication and user management backend architecture (scalable & high performance) with broker API integration security implementation Mandatory: 1. Share a live link where you are working 2. Provide proof of work (GitHub, portfolio, or client reference) 3. Explain your exact role in the project Preferred Skills: 1. Experience with stock/crypto/forex trading platforms 2. Knowledge of r...

    $35 / hr Average bid
    $35 / hr Oferta medie
    80 oferte

    PİYON ACADEMY – FULL SaaS ARCHITECTURE (UPDATED) This system is not an ordinary school panel. It is an AI-supported, performance analytics, Woodpecker integrated SaaS infrastructure. Main System Modules 1️ Multi-Campus & Tenant Architecture 2️ Role & Authorization Engine 3️ Student Lifecycle Automation 4️ Curriculum & Academic Structure Engine 5️ Lesson Management System 6️Attendance & Compensation Engine 7️Lichess & Rating Integration Module 8️ PGN Analysis Integration 9️ Academic Snapshot Engine Reporting & Analytics Layer 1️1 Finance & Enrollment Module 1️2 SaaS & Licensing Layer 1️3 Woodpecker Training Engine Module Details 1️ Multi-Campus & Tenant Architecture Campus-based data isolation Academic and financial separation SaaS licens...

    $12 / hr Average bid
    $12 / hr Oferta medie
    55 oferte

    I own a bike-rental company and need a web application that lets customers book their bikes completely online. The core of the project is a streamlined booking flow where riders can browse my fleet, pick the exact model they want, and immediately see whether it’s available for their chosen dates. An interactive calendar should make date selection quick and intuitive, and once a slot is locked in, inventory must update in real time so double-bookings never happen. On the back end I want to add, edit, or retire bike models, adjust pricing, and block out maintenance periods from a simple dashboard. Every confirmed reservation should appear in an admin view where I can manually override or cancel if needed. The interface has to be mobile-friendly (most customers will book from their ph...

    $317 Average bid
    $317 Oferta medie
    117 oferte
    Google & Apple Pay Integration
    6 zile left
    Cont confirmat

    My Laravel 8 donation platform already processes one-off and recurring gifts through Stripe with standard credit and debit cards. I now want supporters on modern browsers and devices to complete the same recurring donations with Google Pay and Apple Pay. Here is what I expect: • Extend my existing Stripe integration so the Payment Request Button surfaces Apple Pay on Safari and Google Pay on Chrome/Android, following Stripe’s recommended flow for recurring/subscription payments. • Keep all current functionality—plan creation, webhooks, receipts—working exactly as before. • Test thoroughly in both Stripe test mode and live mode, confirming that a $1 test plan renews correctly. • Supply the updated Laravel controllers, Blade views, JavaScript...

    $150 Average bid
    $150 Oferta medie
    129 oferte
    iOS/Android App & E-commerce Site
    6 zile left
    Cont confirmat

    Dear [Agency Name / Team], I hope you are doing well. I am currently developing an e-commerce mobile application and website, which is already in an advanced stage of development. The core architecture and major feature sets have largely been completed by my existing full-time team. As the project transitions from heavy development into refinement, optimization, feature enhancement, and maintenance, I am looking to migrate to a lean, part-time engagement model to ensure cost efficiency while maintaining technical stability and scalability. Project Overview Project Type: E-Commerce Mobile App & Website Current Stage: Advanced Development / Pre-Launch Optimization Engagement Model Required: Part-Time / Dedicated Support Existing Technology Stack Our platform is built using: Backend: Node...

    $310 Average bid
    $310 Oferta medie
    70 oferte

    We are seeking an expert developer to integrate an ACH payment processor into our CRM system using the provided SOAP API. The ideal candidate will have extensive experience with SOAP APIs and a strong understanding of payment processing systems. You will be responsible for ensuring a seamless integration that allows for secure transactions and user-friendly functionality. Key Requirements: - Strong experience with SOAP API integration - Understanding of ACH payment processing and NACHA standards - Experience with JavaScript/Node.js - Knowledge of RESTful API development - Attention to detail and adherence to industry standards - Proven track record in similar payment integration projects This is a full-time hourly position. If you have relevant experience, we encourage you to apply.

    $15 / hr Average bid
    $15 / hr Oferta medie
    137 oferte

    Actualmente manejo un sistema de facturación e inventario de escritorio que trabaja sobre PostgreSQL. Necesito un profesor que me enseñe a crear aplicación web que se conecte a esa misma base de datos y añada las funciones propias de un almacén, sin duplicar información ni alterar la lógica del sistema existente. Alcance principal • Gestión de inventario en tiempo real: seguimiento de stock, actualización de productos y alertas automáticas cuando el nivel sea bajo. • Ubicaciones internas y traslados entre almacenes: registrar estantes, pasillos o sucursales y mover mercancía manteniendo el historial. • Interfaz amigable, responsive y segura con autenticación de usuarios y perfiles de a...

    $8 / hr Average bid
    $8 / hr Oferta medie
    39 oferte

    Procuro comprar, à vista, o código-fonte completo de um aplicativo IPTV em Kotlin semelhante ao IBO Player (versão 3.4 ou superior) acompanhado de um painel administrativo em PHP. Meu foco principal é o painel: ele precisa permitir o cadastro e gerenciamento de MACs e o controle de assinaturas mensais. Já possuo um painel funcional e o APK final, porém não tenho acesso ao código Kotlin; estou até desenvolvendo um projeto próprio, mas acelerar o processo comprando uma base pronta seria muito mais interessante. O que preciso receber: • Código-fonte do app em Kotlin, pronto para compilar no Android Studio. • Painel PHP com gerenciamento de MACs e assinaturas plenamente operante. • Instru&cc...

    $198 Average bid
    $198 Oferta medie
    18 oferte

    Looking for Interview Support for Mid-Senior level Software Engineer roles at Big Tech/FAANG companies (SDE II/Senior Software Engineer). Need an expert who is good with data structures & algorithms, System Design and Behavioral interview stories. Looking for someone who has exceptional experience with Distributed Systems, Event-driven Architecture, designing fault tolerant systems and handling scaling especially with Java and Python based applications.

    $22 / hr Average bid
    $22 / hr Oferta medie
    71 oferte

    I’m gearing up for Big Tech companies Mid-level to Senior Backend Engineer roles and I am looking for interview guidance and support for the same who is very good with data structures & algorithms, System Design and Behavioral Interview. and I’d like expert guidance to sharpen my performance. The position I’m targeting leans heavily on Java and Python. If you’ve successfully coached other backend candidates or conducted interviews yourself, I’m ready to start right away and can adapt to your preferred scheduling and tooling.

    $24 / hr Average bid
    $24 / hr Oferta medie
    83 oferte

    Projet : Mise en production SaaS Santé (HANA) – Emergent → Production CNDP-ready (Maroc) Bonjour, J’ai développé un prototype fonctionnel d’une plateforme SaaS de télésurveillance médicale appelée HANA, actuellement en version preview sur Emergent. Je cherche maintenant un ingénieur expérimenté (Backend / DevOps senior) pour transformer ce prototype en une V1 réellement exploitable en production, hébergée au Maroc, avec un socle de sécurité adapté aux exigences de la CNDP (données de santé). L’objectif est de disposer d’une plateforme stable, maintenable et scalable, prête pour un déploiement clinique pilote puis u...

    $486 Average bid
    $486 Oferta medie
    57 oferte

    I’m putting together a reusable boiler-plate based on Bun, Elysia, HTMX and Better-Auth. The goal is a pattern I can lift into a variety of future projects whenever I need tight authentication, fine-grained authorization and a back-office where admins can manually register users and set/configure authorization policy. Here is where I need you: • Architectural kick-off – I want rock-solid design patterns and best practices from day one, with security woven through every layer and a flexible auth system that can evolve as requirements shift. • Front-end / back-end integration – Help me keep the wiring clean so new modules or UI components can be dropped in without a full rewrite. • Ongoing pair-programming / troubleshooting – When my junior develo...

    $52 / hr Average bid
    $52 / hr Oferta medie
    35 oferte

    1.-PROJECT TITLE (Short & Professional) Development of a Blockchain-Based Decentralized Authentication Prototype Integrated with SQL Server 2.-BULLET POINT VERSION (If it asks for key points) You can paste this in the bullet/summary section: Academic research prototype (not a full hospital system) Decentralized authentication using blockchain (smart contract) Integration with Microsoft SQL Server Medical records stored in SQL Server (not on blockchain) Blockchain used for authentication hash validation Architecture documentation required Basic performance observation (authentication response time) Conceptual alignment with GDPR and HIPAA (no legal certification required) Full source code and technical explanation required 3.-FULL DESCRIPTION (Complete Version to Post) Hel...

    $159 Average bid
    $159 Oferta medie
    52 oferte
    Cricket Fantasy App Build
    5 zile left
    Cont confirmat

    The project is a full-scale, cross-platform cricket fantasy gaming application that must run smoothly on both iOS and Android devices. I already have the feature set clearly mapped out, so the focus is on clean execution and rapid delivery within the next month. Core functionality to implement: • Live score updates pulled from a reliable cricket data API in real time • Robust fantasy team management where users draft, trade and track player performance • Dynamic leaderboards and rankings that recalculate instantly after every scoring event A modern, intuitive UI/UX is essential so users can glide from team selection to live match tracking without friction. The back end should be cloud-ready, scalable and secure, handling user authentication, scoring logic, push not...

    $387 Average bid
    $387 Oferta medie
    34 oferte

    Desarrollo del MVP de Real Guardian AI (SaaS de alertas para pequeños negocios del sector hostelería). El proyecto consiste en desarrollar la primera versión funcional del producto, enfocada exclusivamente en: • Registro e inicio de sesión de empresas. • Arquitectura backend base con base de datos PostgreSQL. • Ingesta automática de datos mediante archivo CSV enviado por email. • Motor de alertas con 3 reglas principales: Caída anormal de ventas. Reducción significativa de margen. Stock crítico. • Panel de alertas con indicador global de estado. • Historial básico de alertas. • Separación clara entre web pública y área privada. • Repositorio bajo control del clie...

    $1340 Average bid
    $1340 Oferta medie
    139 oferte

    What We Are Building We are building an ad monetization platform similar to Freestar and AdPushup. The platform helps website and app publishers maximize their ad revenue. We are a Google Partner with access to Google Ad Exchange (AdX) demand and have accounts with multiple SSP/Prebid partners. Note: We are not currently an MCM (Multiple Customer Management) partner, so AdX demand is served through our own GAM account. The platform consists of three main parts: • A JavaScript tag that publishers place on their website which handles everything: running Prebid auctions, calling GAM, rendering ads, and reporting data back to us • A backend / admin dashboard where we configure everything per publisher: ad units, bidders, floors, formats, and settings • A publ...

    $2218 Average bid
    $2218 Oferta medie
    74 oferte

    I need a versatile full-stack Java developer who can dedicate a full 8-hour shift aligned with Pacific Standard Time. The work revolves around a new enterprise platform we are rolling out internally, and I expect you to be comfortable owning both back-end Java code and the corresponding front-end layer. Scope of the build The application’s first release must cover three core capabilities: • User management • Data analytics • Workflow automation We will tackle these features in two-week Agile sprints, with planning, daily stand-ups, and sprint reviews held on my calendar in PST. You will demo working software at the end of every sprint so we can decide together what to refine next. Your day-to-day – Write clean, tested Java code and wire it to a modern fr...

    $606 Average bid
    $606 Oferta medie
    27 oferte

    We are looking to develop a high-quality mobile game application for both iOS and Android platforms. The objective is to build an engaging, visually appealing, and performance-optimized game that delivers a seamless user experience across devices. The project will involve complete end-to-end development including UI/UX design, game design, development, backend integration (if required), testing, deployment, and post-launch support. The game should be compatible with the latest versions of iOS and Android, optimized for smartphones and tablets, and built using a scalable architecture. Key requirements include user authentication (if multiplayer or profile-based), in-game rewards system, leaderboard integration, smooth animations, sound integration, push notifications, and secure in-app pu...

    $510 Average bid
    $510 Oferta medie
    36 oferte

    I want a crypto air drop Mini app before the coin launching which many features some games daily rewards live price indicator of cryptocoins referral and task of joining Channel groups and many other features

    $65 Average bid
    $65 Oferta medie
    11 oferte

    Hi, I have a Laravel-based recharge app with refer & earn (MLM) system. I need to update my business plan values (joining fee, level incomes – 6 levels). No UI change, only backend logic + payout calculation update + upi payout api integration I have full server + source code access. Can you do this? Please share: Your experience with Laravel Similar work done (screenshots or links) Fixed cost & time required Thanks.

    $3 / hr Average bid
    $3 / hr Oferta medie
    26 oferte

    I'm looking for an experienced developer to build a new mobile application for Android using Node.js. Key Requirements: - Proficient in Node.js - Familiar with Git, VS Code, and GitHub - Experience with hosting on Vercel - Backend integration with Supabase or Firebase - Access and integration of WhatsApp Business API Ideal Skills and Experience: - Strong background in mobile app development, specifically for Android - Experience with backend services like Supabase or Firebase - Knowledge of WhatsApp Business API - Good understanding of version control and deployment processes Please provide a portfolio of similar projects. Looking forward to your bids!

    $548 Average bid
    $548 Oferta medie
    178 oferte
    Optimize Load Time & Email Flows
    5 zile left
    Cont confirmat

    I need a developer-marketer hybrid who can tackle two pain points at once. First, the site’s initial page load is noticeably slow; users see a blank screen long enough to bounce. I’m looking for genuine front-end and back-end optimisation—code minification, image compression, caching, server tweaks—whatever brings first-paint and full-load to well under two seconds. At the same time, my customer journey suffers from under-designed email flows. I have content ready, but I need the flows mapped, the triggers set up, and the templates built so they render perfectly on all major clients and devices. Think welcome series, cart recovery, and post-purchase touchpoints with responsive HTML/CSS and clean, on-brand styling. Both tasks carry equal weight and I’d li...

    $452 Average bid
    $452 Oferta medie
    168 oferte

    I'm seeking a skilled developer to create a mobile social media app focused on tracking fitness progress, specifically for weight lifting. Key features include: - User connectivity based on similar fitness goals - Ability to track lifting progress by uploading videos or images - User-friendly interface for seamless interaction Ideal Skills: - Experience in mobile app development - Proficiency in backend and frontend technologies - Knowledge of UI/UX design principles - Previous work on fitness or social media applications is a plus Looking for a candidate who can deliver a high-quality, engaging, and functional application within budget.

    $757 Average bid
    $757 Oferta medie
    261 oferte
    Buy Real-Cash Gaming App
    5 zile left
    Cont confirmat

    I’m ready to hand over a fully-operational real-cash gaming application code that is already packaged for both iOS and Android. The entire product—including codebase, live builds, admin panel, and payment integration—can be transferred immediately for a single, fixed cost of US $15,000. Core highlights • Cross-platform release: the same feature set performs smoothly on iPhone, iPad, and the full range of Android devices. • Proven money-in / money-out workflow with secure wallet management and real-time transaction tracking. • Flexible game engine: it currently supports popular real-cash formats and can be expanded to casino games, sports betting, or interactive tournaments depending on your future roadmap. in. What you receive 1. Full source c...

    $756 Average bid
    $756 Oferta medie
    17 oferte

    I'm seeking a developer to create an advanced package tracking system for our postal service. The system will primarily serve both customers and postal staff. Key Requirements: - Primary Function: Package tracking - Key Features: - Delivery status notifications Ideal Skills and Experience: - Experience in developing tracking systems - Proficiency in real-time data processing - Strong backend and frontend development skills - Familiarity with user interface design for both web and mobile applications

    $18 / hr Average bid
    $18 / hr Oferta medie
    214 oferte

    Delivery Dispatch System Overview 1. Introduction An efficient and scalable dispatch system designed to streamline deliveries, enhance customer experience, and optimize operations for vendors, drivers, and administrators. 2. Key Features A. Ordering Mobile App & Website Standard Features: Search & Filter – Find products easily. Voice Instruction – Hands-free order placement. Track Your Order – Real-time GPS tracking. Store Pickup – Option to pick up orders in-store. Loyalty Points – Reward-based customer engagement. Add To Wishlist – Save items for later. Nearby Grocery Store – Locate stores in the vicinity. Edit Order – Modify orders before dispatch. Recommended Items – AI-driven suggestions. Pickup Flow – Simplified pic...

    $287 Average bid
    $287 Oferta medie
    89 oferte

    Saya akan memulai sebuah proyek pengembangan web dan perlu memastikan saya bekerja dengan orang yang tepat. Untuk itu, saya membutuhkan testimoni klien yang secara spesifik berasal dari proyek-proyek web serupa yang pernah Anda selesaikan. Apa yang saya harapkan Anda kirimkan: • 3–5 testimoni tertulis dari klien sebelumnya yang relevan dengan pengembangan web. • Setiap testimoni mencantumkan ringkasan proyek (fitur utama, teknologi yang digunakan, skala), durasi pengerjaan, serta tingkat kepuasan klien. • Tautan atau bukti visual (jika tersedia) ke proyek yang disebutkan, agar saya dapat meninjau hasilnya secara langsung. • Kontak klien (opsional) untuk verifikasi, bila klien Anda mengizinkannya. Pastikan testimoni tersebut benar-benar berasal dari klien A...

    $20 Average bid
    $20 Oferta medie
    2 oferte

    My current site has grown messy over several incremental updates, so I want the codebase completely re-engineered. The work covers full-stack needs—both the front-end interface and the back-end logic/database. I will give you the existing repository, a staging server, and a short list of pain points; from there I expect you to streamline the architecture, modernise the tech where sensible, and leave me with a cleaner, faster, well-documented product that deploys smoothly. Key deliverables • Refactored, well-commented source code pushed to Git • Any new build or deployment scripts required for the updated stack • A concise hand-off document summarising changes, dependencies, and rollout steps I’m ready to provide rapid feedback on pull requests so we can m...

    $504 Average bid
    $504 Oferta medie
    210 oferte

    I need a seasoned backend developer to take full ownership of the server-side engine for a new ecommerce platform and stay on for ongoing maintenance as we scale. The scope begins with architecting a clean, well-documented API layer that powers the entire buyer journey—from browsing the catalogue and filling a cart, through checkout, payment, and post-purchase flows such as returns. In parallel, you’ll build out the seller pathway: onboarding, KYC verification, inventory sync, and order management. Key requirements • Robust cart, checkout, and return logic that can handle discounts, promotions, and edge-case calculations without breaking state. • Seamless Razorpay integration (cards, wallets, net-banking—all via Razorpay’s SDK and REST endpoints) with...

    $283 Average bid
    $283 Oferta medie
    97 oferte
    Fintech Backend for Credit Offers -- 2
    5 zile left
    Cont confirmat

    The FIGMA for my credit-card-offers app is complete; now I need the server-side engine that will make the screens come alive. The scope is an MVP-ready backend built from scratch, including both the API layer and a brand-new database. The will work in sync with a browser extension being developed separately. I haven’t committed to a tech stack yet, so feel free to suggest Node.js, Python, Java, or another modern choice you’re comfortable maintaining. Whichever stack you choose, I expect. Need to develop both Android and iOS.

    $1116 Average bid
    $1116 Oferta medie
    267 oferte

    I'm looking for a skilled web developer to create a comprehensive platform for gamers, akin to LinkedIn but tailored for the gaming industry. This website will serve as the central hub for gamers, scouts, and sponsors. Key Features: - Showcasing Gamer Profiles: Detailed profiles highlighting skills, achievements, and gameplay. - Connecting Gamers with Scouters: A dedicated section for talent scouts to discover potential candidates. - Hosting Gaming Events: Information and registration for various gaming events. - Live Streaming: Integration for gamers to stream their gameplay live. - Community Forums: Spaces for discussions, tips, and networking. - In-Game Event Tracking: Updates and notifications about in-game events. Ideal Skills and Experience: - Web development (front-end and ba...

    $52 / hr Average bid
    $52 / hr Oferta medie
    94 oferte

    I am launching a new YouTube channel for toddlers (ages 1–3) and I am looking for a professional animator / video editor to create high-quality animated episodes. Each episode will be approximately 3 minutes long. I will provide: • Fixed main characters (images/designs provided by me) • Full script for each episode • Voiceover text • Clear creative direction The animator will be responsible for turning the provided characters and script into a smooth, engaging, toddler-friendly animated video.

    $32 Average bid
    $32 Oferta medie
    22 oferte

    I’m kicking off a multi-platform compliance audit solution and want to get the first, fully functional Android build in place before we move on to iOS and a web front end. The core workflow is straightforward: field teams open the app, enter audit data into structured forms, snap photos on-site, and sync everything securely to the server. An intuitive UI, offline capability with background sync, and airtight data protection are essential because the information collected is often sensitive. Here’s how I see the first milestone coming together: • A production-ready Android app with clean, modern Material design • Dynamic forms that let users add, edit, and validate audit data on the spot • Integrated camera access so photos attach seamlessly to each record...

    $273 Average bid
    $273 Oferta medie
    55 oferte

    我们正在为一家德国健身房连锁升级跑步机控制系统,目标是在 2-3 个月内把 RFID 识别功能无缝接入合作方的 Android 平板。项目直接服务于现有业务,任何延迟都会影响门店上线排期,因此我特别看重过往 Android 与硬件打通的实战经验。 核心工作 • 在 Android 应用层完成 RFID 标签识别、数据读取与会员账号绑定等核心逻辑,并保证高并发场景下的稳定性与容错 • 对接现有 RFID 模块,解决驱动、协议或功耗问题 • 与公司后端接口联调,保证设备与云端数据一致且实时 • 独立完成功能测试、缺陷定位和修复,并撰写接口说明、模块设计与使用指引 • 每周参加海外英文例会、评审会,英文汇报进度与风险,会后输出英文会议纪要 交付物 1. 可在指定跑步机硬件上运行的 Android APK(含 RFID 功能) 2. 对接文档、接口清单与使用手册(中英双语) 3. 测试报告及缺陷闭环记录 4. 会议纪要及风险跟踪表 协作方式 • 允许远程为主,有需要时可线下沟通 • 能适应晚间跨时区会议 • 主要挑战在语言障碍,需流利英文听说及书面沟通 如果你具备 3 年以上 Android 开发经验,并且真正动手做过 RFID / NFC / BLE 等硬件通信项目,欢迎一起完成这次健身设备升级。

    $103 / hr Average bid
    $103 / hr Oferta medie
    3 oferte

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