Spring Boot Jobs

Product Overview P2P Crypto Marketplace for Digital Goods A decentralized, escrow-backed peer-to-peer marketplace enabling users to safely trade digital goods (subscriptions, gift cards, licenses, accounts) using cryptocurrency, launched as a Telegram Mini App for instant global reach. The platform eliminates trust issues in digital goods trading by combining KYC verification, smart-contract escrow, and multi-step trade validation. Core Value Proposition Trade digital goods globally with crypto—without trust, fraud, or delays. No chargebacks No middleman holding funds No long onboarding Built for crypto users, not adapted for them How It Works (Trade Flow) User Verification Telegram login (one-tap) Mandatory KYC (basic → advanced tiers) Wallet connection (EVM-comp...

deploying the official open-source backend components and integrating them with various third-party services for full functionality. • mainly our requirements our own infrastructure Self-Hosted with Custom Instance public rebranded messaging app. • Only people who have previously studied and worked on production-style Signal server architecture and structure should communicate • Those who have not previously studied and worked on production-style Signal server architecture and structure should not submit bid proposals. • The official source code is open-source and available on GitHub. • You only need to deploy and configure the Signal server only. The process requires significant technical expertise in server management, Java, database administrat...

I’m building a new mobile application and I need a robust Java Spring Boot backend to power it. The core services you’ll create must cover: • User authentication and management with full multi-factor authentication (MFA) and support for future multi-party authentication flows. • A streamlined customer-onboarding journey that begins with registration and ends with a verified, fully profiled user record. • Reliable data storage and retrieval using a relational engine—MySQL or PostgreSQL, whichever you are most comfortable optimising. RESTful APIs should be documented with Swagger/OpenAPI, secured with JWT or a similarly strong token strategy, and thoroughly unit- and integration-tested. I’ll provide the mobile team’s contract-first API s...

I run a Java-based restaurant management application and need it to talk seamlessly to both Swiggy and Zomato so that staff never have to re-enter data in multiple dashboards. The scope is straightforward: connect to each partner API, pull menus, push updates, receive orders instantly, and track every delivery milestone without manual refreshes. Real-time event handling (webhooks or long-polling, whichever the platforms allow) is essential so that kitchen screens and POS reports stay in sync second-by-second. Please deliver: • Menu synchronisation: create, update and deactivate items and modifiers from my app and reflect those changes on Swiggy and Zomato. • Order management: ingest new orders automatically, send accept/cancel actions, print kitchen tickets, and post order stat...

can you run the below project in my machine and explain

We’re expanding the next round of services at Inboxlogy, and we’re looking for a freelance backend developer to help us build new features on top of our existing application. About Inboxlogy, Inboxlogy helps businesses grow 10X faster by setting up scalable email outreach infrastructure and providing cost-effective deliverability solutions. Our core system is already built — now we’re enhancing it with new modules and advanced functionality. What You’ll Work On You’ll be responsible for backend feature development and system enhancements, including: * Building and enhancing REST APIs using Java + Spring Boot * Designing scalable business logic and service layers * Working closely with the front-end team to support new features * Integrating with MongoD...

I’m putting together a corporate head-count tracker and I want to move quickly from concept to a secure, production-ready application. The backend will run on Spring Boot; the frontend needs to be available both as classic HTML/CSS/JavaScript pages and as a richer React interface, so we can serve different devices and gradually migrate stakeholders toward React. Security is essential. I need full user authentication with clear role separation—Admin and User—implemented with Spring Security (JWT or another proven token strategy). Beyond wiring the login flow, I also want advice on best-practice password storage, CSRF protection, and anything else you see fit to lock things down. Where I need your help: • Designing the Spring Boot architecture, setting up entities, r...