The ultimate guide to hiring a web developer in 2021
If you want to stay competitive in 2021, you need a high quality website. Learn how to hire the best possible web developer for your business fast.
JSON stands for JavaScript Object Notation and it is a data-interchange format that is used for storing and exchanging information. It is more lightweight than the traditional XML format and is even used to send data across the internet from a web server. JSON developers are experts in understanding the syntax of this technology, but also in designing and coding up solutions for a wide range of problems for clients. JSON developers have an essential role in developing a variety of applications such as databases, websites and server-side applications.
Here's some projects that our expert JSON Developers made real:
Overall, hiring a skilled JSON developer can enable businesses to harness the power of a wide range of web solutions — from report automation scripts, eCommerce shopping rules to flight search result interfaces — that be customised for any application or platform. With the help of Freelancer Platform, clients can find experienced and reliable professionals that have collaborated with businesses globally. With access to experts in the field, businesses can rest assured that their projects are being handled by specialized professionals that are well versed with this technology. We invite you to post your project on Freelancer Platform so you can find the most suitable professional for your needs.
Conform celor 133,692 recenzii, clienții îi evaluează pe JSON Developers cu 4.9 din 5 stele.JSON stands for JavaScript Object Notation and it is a data-interchange format that is used for storing and exchanging information. It is more lightweight than the traditional XML format and is even used to send data across the internet from a web server. JSON developers are experts in understanding the syntax of this technology, but also in designing and coding up solutions for a wide range of problems for clients. JSON developers have an essential role in developing a variety of applications such as databases, websites and server-side applications.
Here's some projects that our expert JSON Developers made real:
Overall, hiring a skilled JSON developer can enable businesses to harness the power of a wide range of web solutions — from report automation scripts, eCommerce shopping rules to flight search result interfaces — that be customised for any application or platform. With the help of Freelancer Platform, clients can find experienced and reliable professionals that have collaborated with businesses globally. With access to experts in the field, businesses can rest assured that their projects are being handled by specialized professionals that are well versed with this technology. We invite you to post your project on Freelancer Platform so you can find the most suitable professional for your needs.
Conform celor 133,692 recenzii, clienții îi evaluează pe JSON Developers cu 4.9 din 5 stele.I maintain a referral network that relies on a multi-thousand-item product taxonomy and a relationship graph. Right now the data shows three main pain points, with correcting miscategorized items at the top of the list. Inconsistent tags appear everywhere—22 categories and more than 200 sub-categories—so each pass you make must scale yet still catch edge cases. You’ll work from my written rules and the issue log, using a combination of Python scripts (working with JSON and CSV exports) and careful manual review. Scripts can handle bulk renaming, tag normalization, and simple validation; your judgement comes in when a product seems to straddle two categories or when a referral link just feels off. Deliverables • A cleaned taxonomy file (CSV or JSON) with corre...
Project Title: Low-Power Cellular IoT Predictive Maintenance & Leak Detection System Project Overview: We are seeking an experienced developer to design and prototype an integrated, low-power, battery-operated IoT device utilizing an off-the-shelf cellular prototyping architecture (e.g., Particle Boron or Blues Wireless Notecard). The device will perform twin monitoring tasks: physical leak detection via a traditional sensor, and mechanical predictive maintenance via Acoustic Anomaly Detection (AAD). The system must run on a battery budget that supports deep sleep, waking up instantly on a leak interrupt or periodically on a timer to perform a self-test and acoustic health assessment. Data must route through a cloud middleware layer via webhooks to a custom website dashboard, with cri...
I have a live application whose core runs on PHP while several service layers are written in Node.js. Everything works—until the JSON we pass between layers silently shifts and breaks the backend. Right now I only need bug fixes; no new features or tuning, just rock-solid stability. Here’s what I’m dealing with: • backend endpoints intermittently return malformed or incomplete JSON • downstream PHP code then throws errors or stops responding altogether Your job is to trace where the JSON structure changes, correct the offending Node or PHP handlers, and make sure the same schema is respected throughout every call. Once the patch is in place I’ll want the updated code committed to Git and a brief note of what was changed so I can follow along. Aut...
Title: SurveyJS Form, Configurable Rules Engine & Compliance Dashboard – Pilot Project v2 *** Please completely read the description as it has been updated Project Description I’m looking for an experienced developer to help digitize and automate a complex compliance/reporting form based on reporting guidance. The goal is to replace manually reviewed forms and manual Excel summaries with a SurveyJS‑based solution, a configurable rules engine, and a reporting/dashboard layer. The work will start with a small paid pilot task so you can demonstrate your ability before we expand to the full project. What I need The final solution should: - Build the full questionnaire in SurveyJS (JSON) based on an existing annotated PDF form and instructions. - Implement completeness and ...
Je souhaite connecter sur mon site l’API privée de mon client afin que mes visiteurs voient, en temps réel, les niveaux de stock disponibles pour chaque produit. Voici le cadre : • Type d’API : service de données tierces, fourni directement par mon client. • Objectif : afficher clairement les informations de stock aux clients (quantité restante, indisponibilité, délais de réapprovisionnement). Ce dont j’ai besoin : 1. Installer la clé et les identifiants d’accès sécurisés sur mon hébergement. 2. Développer les appels API (GET principalement) et gérer les réponses JSON ou XML. 3. Mettre en cache intelligent pour éviter de dép...
I need a reliable web-scraping solution that pulls up-to-date market statistics focused on individual wrestlers. The target sites are public sports portals and federations that list match results, rankings, and season performance; I’ll supply the URLs as soon as we start. The scraper must extract for every athlete: full name, weight class, team or club, most recent match outcome, cumulative win-loss record, points scored, and ranking movement over time. I want the data normalised into a single CSV and a companion JSON feed so it can drop straight into my analytics pipeline. Python is my usual stack, so Scrapy, BeautifulSoup, or a light Selenium layer for the occasional dynamic page all work. Please build in polite rate limiting, user-agent rotation, and a quick retry strategy so th...
Title: SurveyJS Form, Configurable Rules Engine & Compliance Dashboard – Pilot Project Project Description I’m looking for an experienced developer to help digitize and automate a complex compliance/reporting form based on reporting guidance. The goal is to replace manually reviewed forms and manual Excel summaries with a SurveyJS‑based solution, a configurable rules engine, and a reporting/dashboard layer. The work will start with a small paid pilot task so you can demonstrate your ability before we expand to the full project. What I need The final solution should: - Build the full questionnaire in SurveyJS (JSON) based on an existing annotated PDF form and instructions. - Implement completeness and consistency rules (required fields, conditional questions, required upl...
I need real-time odds from both Betfair and Pinnacle stream. I do need funded verified pinnacle and betfair account with odds feed. Need just accounts or working api that use account with 0 latency
My MERN-based medical platform is already feature-complete and sitting in a private Git repo; only a round of QA fixes stands between it and production. I now need a solid full-stack team that can step in, close every open bug, harden the code, and drive the app all the way through staging, UAT and live deployment (Docker + CI/CD to the cloud is preferred). The bigger challenge is an add-on “analyzer” service. Its sole purpose is to pull raw readings directly from laboratory analyzers and inject them into our existing test-result flow—essentially automating what is still a manual entry step. • Type of processing: the analyzer’s job is “taking data from Analyzers into the test result” pipeline; no further statistical or predictive crunching is re...
¿Eres experto en automatización con Make y APIs de IA? Necesitamos tu apoyo esta semana. Estamos construyendo un flujo de automatización para la captación y calificación de leads para una comunidad de Skool sobre finanzas digitales, y buscamos a un freelancer que nos ayude a implementarlo de principio a fin, de forma técnica y ordenada. El proyecto consiste en conectar y configurar las siguientes piezas: un formulario/proceso en Skool que captura respuestas de un lead, un webhook que envía esas respuestas a un escenario en Make, un módulo de Claude (API) que analiza las respuestas y genera un resumen del lead, su prioridad y su perfil de inversionista, y un módulo de parseo de JSON que estructura esa información. Luego...
¿Eres experto en automatización con Make y APIs de IA? Necesitamos tu apoyo esta semana. Estamos construyendo un flujo de automatización para la captación y calificación de leads para una comunidad de Skool sobre finanzas digitales, y buscamos a un freelancer que nos ayude a implementarlo de principio a fin, de forma técnica y ordenada. El proyecto consiste en conectar y configurar las siguientes piezas: un formulario/proceso en Skool que captura respuestas de un lead, un webhook que envía esas respuestas a un escenario en Make, un módulo de Claude (API) que analiza las respuestas y genera un resumen del lead, su prioridad y su perfil de inversionista, y un módulo de parseo de JSON que estructura esa información. Luego...
*Certified Solution Developer* I need an IBM App Connect Enterprise (ACE) specialist who can jump straight into hands-on message flow development. The assignment centres on building and optimising flows that connect several airline-industry applications, so familiarity with patterns common to reservation, ticketing, or departure-control systems will be a real advantage. You will receive detailed interface contracts, sample payloads (JSON, XML), and access to our Dev MQ queues and REST endpoints. From there I expect you to design, code and unit-test the flows, making smart use of ESQL, JavaCompute nodes or Mapping nodes as appropriate, and package everything so it can be promoted through our existing CI/CD pipeline (Git, Jenkins, BAR files). Please outline the airline-related IBM ACE or ...
We are looking for an experienced backend developer with strong knowledge of AWS (SES, S3, Lambda) and the Frappe Framework. We need to build an event-driven "push" architecture for incoming emails. Instead of relying on Frappe's default 5-minute IMAP sync, we want incoming emails routed through AWS SES, parsed by AWS Lambda, and pushed instantly to our Frappe server via REST API. Key Responsibilities: Configure AWS SES to receive inbound emails for our domain and store the raw MIME files temporarily in an Amazon S3 bucket. Write an AWS Lambda function (Python or Node.js) triggered by SES/S3. The Lambda function must parse the raw email to extract the Sender, Recipient, Subject, Text Body, HTML Body, and any Attachments. Push this parsed data as a clean JSON payload to ...
More details: Do you already have access to the Instagram API? I'm not sure Do you have a developer account with Instagram? Yes, I have a developer account Do you have experience creating API requests? No, I need help A JSON URL (is an acronym of JavaScript Object Notation) is a file format that enables to stock data, and this is through this URL your Custom Counter will be able to display a number. The Custom Counter can display any data, provided that you are allowed to access and use it. In order to enable your Custom Counter to display a number, you will need to create a JSON URL, which will act as a bridge between the platform hosting the data and the Counter itself. You can find below a plan that explains how the Custom Counter fetch the data you want : How can I create ...
Design, configure, and maintain Asterisk-based telephony systems. Develop and manage SIP trunk configurations, IVRs, call routing, DID management, and dial plans. Integrate telephony systems with REST APIs, webhooks, and third-party platforms. Build and maintain API integrations for the Neurova platform. Configure inbound and outbound call flows, click-to-call, predictive dialing, and intelligent routing. Work with AI Voice Agents and ensure seamless human call transfer (human failover). Integrate WhatsApp, SMS, Email, CRM, and other communication channels where required. Troubleshoot voice quality, SIP signaling, RTP issues, and carrier connectivity. Collaborate with the AI development team to integrate Speech-to-Text (STT), Text-to-Speech (TTS), and LLM-based conversational workflows. Op...
I need a lightweight Chrome extension that will run smoothly on my Acer Chromebook and automate three actions inside Discord’s web client: selecting a message from a predefined list, pasting it into an open chat channel, and sending it on a loop. Core workflow • The extension loads a list of preset lines I maintain (hard-coded JSON, simple TXT, or an in-extension editor—whichever is easier to implement). • At a user-set interval it grabs the next line, focuses the message box, pastes, and triggers the normal Enter/Send event. • Once it reaches the end of the list it should cycle back or optionally shuffle to look less repetitive. Essential features • Runs entirely in-browser; no external executables or drivers. • Simple pop-up UI to start/st...
I already have a Python-based Scrapy project and now need dedicated spiders that can harvest data from the mobile apps Rabbitmart (Egypt), Voo (Egypt) and Oscar (Egypt). The crawlers should pull every publicly available endpoint (or reverse-engineered one) required to deliver: product details, user reviews, pricing information, the underlying product IDs, any active promotions or discounts and—where the apps expose it—current stock levels. All captured information must be written to clean, well-structured JSON files so that I can feed it straight into my existing pipeline. I’m still unsure whether the apps will demand login or token-based authentication; therefore, please build the spider with the flexibility to plug in credentials, headers or session cookies if we disc...
1. Meta Graph API, Instagram & WhatsApp Cloud API Integration ## Description We have an existing PHP B2B marketplace. We are looking for an experienced Meta API developer to configure our production Meta environment. ### Scope * Create and configure Meta App. * Configure Facebook Login. * Connect Facebook Page(s). * Connect Instagram Business Account. * Configure WhatsApp Cloud API. * Configure Meta Webhooks. * Complete App Review and required permissions. * Configure long-lived production access tokens. * Test Facebook publishing. * Test Instagram publishing. * Test WhatsApp send/receive messages. * Deliver complete technical documentation. ### Deliverables * Production-ready Meta integration. * Working Facebook publishing. * Working Instagram publishing. * Working WhatsApp Cloud A...
I need a DXL scripting expert for data migration tasks in IBM DOORS Classic. Ideal Skills and Experience: - Proficiency in DXL scripting - Experience with IBM DOORS Classic data modelling - Data extraction and Data migration skills, Data mapping - Familiarity with CSV, XML, or JSON formats Please provide examples of similar work done.
More details: Do you already have access to the Instagram API? I'm not sure Do you have a developer account with Instagram? Yes, I have a developer account Do you have experience creating API requests? No, I need help A JSON URL (is an acronym of JavaScript Object Notation) is a file format that enables to stock data, and this is through this URL your Custom Counter will be able to display a number. The Custom Counter can display any data, provided that you are allowed to access and use it. In order to enable your Custom Counter to display a number, you will need to create a JSON URL, which will act as a bridge between the platform hosting the data and the Counter itself. You can find below a plan that explains how the Custom Counter fetch the data you want : How can I create ...
FILTRO HUMANO OBLIGATORIO: Para confirmar que eres un desarrollador real y que has leído esto con atención, escribe la palabra "PINEAPPLE" en mayúsculas al principio de tu propuesta. Si no lo haces, serás descartado de inmediato por los filtros automáticos. Estoy buscando un desarrollador práctico con experiencia en la API de generación de imágenes de OpenAI (específicamente gpt-image-2) para corregir y optimizar un módulo crítico de mi SaaS llamado "Estudio IA" (dentro de la sección "Droppage"). El problema actual: Nuestro sistema genera bloques de imágenes para armar landing pages de 10 secciones consecutivas (Hero, Oferta, Antes/Después, Beneficios, Tabla Com...
I need a reliable hand to log in to my Tally Prime file each day, enter the fresh vouchers I supply, keep the ledgers tidy, and make sure every taxable transaction is ready for GST filing. Your core focus will be GST compliance—checking purchase and sales entries, matching them with tax rates, reconciling the tax ledger, and preparing the data so my monthly returns can be generated without surprises. Because accurate data is the backbone of smooth GST Filing, I’ll forward all invoices, payment proofs, and credit notes to you as they come in. You’ll post them in Tally Prime the same day, flag any mismatches, and keep a short note of issues that need my sign-off. If you spot an easier way to structure the masters or tax configurations, feel free to suggest it; I welcome wo...
I need a reliable hand to log in to my Tally Prime file each day, enter the fresh vouchers I supply, keep the ledgers tidy, and make sure every taxable transaction is ready for GST filing. Your core focus will be GST compliance—checking purchase and sales entries, matching them with tax rates, reconciling the tax ledger, and preparing the data so my monthly returns can be generated without surprises. Because accurate data is the backbone of smooth GST Filing, I’ll forward all invoices, payment proofs, and credit notes to you as they come in. You’ll post them in Tally Prime the same day, flag any mismatches, and keep a short note of issues that need my sign-off. If you spot an easier way to structure the masters or tax configurations, feel free to suggest it; I welcome wo...
I’m enhancing an existing PHP application and now need an experienced developer to wire in several third-party services. The core of the job is to analyse each provider’s endpoint requirements, extend or refactor the current codebase where necessary, and make sure the new integrations run smoothly alongside what is already in production. You will be working with modern PHP (object-oriented, namespaced) on a LAMP stack, so familiarity with RESTful requests, webhooks, JSON handling, and robust error logging is essential. Security is a must—token management, input sanitisation, and graceful failure states all have to be considered from the outset. I’ll give you access to the repository, environment details and any documentation the vendors supply. Your work should pl...
If you want to stay competitive in 2021, you need a high quality website. Learn how to hire the best possible web developer for your business fast.
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