RESTful API Jobs

We are looking to engage a senior-level software professional with strong expertise in interoperability solutions, particularly within healthcare systems. The requirement involves designing and implementing scalable integration solutions using InterSystems technologies such as HealthShare, Ensemble, or IRIS. The consultant should be capable of developing robust frameworks that enable seamless communication and secure data exchange between disparate healthcare systems, especially EHR platforms. Hands-on experience in building and managing integrations using HL7, FHIR, DICOM, RESTful APIs, SOAP, and JSON/XML formats is essential. The role will require close collaboration with cross-functional teams to understand integration requirements, design compliant architectures, ensure best practi...

1. Payment Gateway Optimization (Razorpay) Goal: Switch from manual UPI ID entry to UPI Intent (auto-opening apps like GPay/Paytm) or Turbo UPI. Action: Integrate the Razorpay Native SDK (not just a WebView). Scope: Implement this in both the Customer App (for order payments) and Delivery App (for wallet top-ups or security deposits). 2. Call Masking API Debugging Goal: Ensure privacy by masking phone numbers between Customers, Delivery staff, and Restaurants. Action: Audit current API integration across all three apps. Identify why errors occur during the "click-to-call" handshake and fix the state management handling the call triggers. 3. Dynamic Incentive Schemes (UI/UX) Goal: Display real-time earnings potential to drivers based on the new admin panel structures. Action...

I’m building a full-stack invoice manager and need someone who can take it from concept to a polished, production-ready web application on the MERN stack. The core flow is straightforward: a user signs up with a traditional email-and-password form, completes a one-time company profile, and from then on every invoice they create automatically applies that branding. Here’s what I need you to deliver: • Secure authentication (email + password) with hashed storage, JWT sessions and basic password-reset flows • A responsive React dashboard that works smoothly on mobile, tablet and desktop, styled with clean CSS (Tailwind or plain CSS-in-JS is fine) • Invoice creation, live preview, PDF generation and download • A simple table to view past invoices with se...

I’m building a full-stack invoice manager and need someone who can take it from concept to a polished, production-ready web application on the MERN stack. The core flow is straightforward: a user signs up with a traditional email-and-password form, completes a one-time company profile, and from then on every invoice they create automatically applies that branding. Here’s what I need you to deliver: • Secure authentication (email + password) with hashed storage, JWT sessions and basic password-reset flows • A responsive React dashboard that works smoothly on mobile, tablet and desktop, styled with clean CSS (Tailwind or plain CSS-in-JS is fine) • Invoice creation, live preview, PDF generation and download • A simple table to view past invoices with se...

I’m building out a new React front-end and now need the server side to catch up. The priority is a robust Node.js backend that exposes well-structured RESTful endpoints returning clean, predictable JSON. The data layer will live in MySQL, so you’ll design the schema, set up migrations, and write queries or use an ORM—whichever keeps performance high and code readable. Although Laravel experience is welcome and I do plan to introduce a small GraphQL layer later, right now your main focus will be the REST API: authentication (token-based), role management, pagination, filtering, and solid error handling. Clear inline documentation and a concise README or Swagger / OpenAPI file should accompany each route so the React team can plug in immediately. I’m flexible on tim...

About the Role As a Senior Fullstack Engineer, you will own the technical health and architectural evolution of mission-critical web applications. You will act as the primary anchor for robust .NET backends and dynamic React frontends, bridging the gap between high-performance server-side logic and modern user interfaces. This role requires an autonomous mindset to navigate diverse codebases, provide clarity through documentation, and drive technical excellence across the delivery lifecycle. Your success is measured by system reliability, the proactive management of technical debt, and your ability to mentor and elevate the engineering team. Key Responsibilities Fullstack Execution: Lead the development of robust architectures using .NET (Core/5+) and React, ensuring high performance, se...

I’m upgrading an existing e-commerce platform and the next milestone is a robust admin dashboard built with React, Tailwind CSS (plus the occasional Bootstrap helper), powered by a Java Spring Boot API backed by MySQL. Priority scope The public-facing site is already live, but the back-office tools are still thin. I want a dedicated dashboard that lets authorized staff control the whole store from one place. All admin routes will be secured with stateless JWT authentication. Core modules to deliver • User management – create, edit, disable users and roles • Product management – CRUD for catalog items, images, categories and inventory levels • Order tracking – view order history, status updates, refunds and fulfilment notes Technical expec...

Front end work has already done. we need api work and laravel backend work. I’m expanding a React.js front-end and need a solid Laravel hand to wire it up to a clean, well-documented REST API. Your job is to build out the endpoints in Laravel, return JSON responses the React components can consume, and keep the codebase readable and testable as it grows.

Overview: The system must be architected to meet enterprise CPaaS performance. Post award of project you will be shared a GitHub Repo update to be pushed there only. The scope includes backend API development, database schema design, & webhook hooks. The service must be built as a extension to existing service to ensure seamless, scalable, and repeatable integration into the main platform. 1. API & Webhooks for Clients • Public API endpoints for sending campaigns, managing templates, and fetching reports. • Webhook support for: • Delivery receipts (DLRs) • Incoming messages/user replies • Sustain minimum 500–1,000 send requests/sec under normal load. • Burst handling up to 3,000 TPS with graceful queuing (no message loss). 2. Integration Layer...

We are seeking a highly experienced Senior Full-Stack Developer to design and build a scalable online tutorial streaming platform that enables creators to upload, manage, and sell video-based tutorials. The developer will be responsible for the entire development lifecycle, including system architecture, backend and frontend development, deployment, security implementation, and long-term maintainability. The backend architecture must be developed using both Python and Java, leveraging the strengths of each technology to create a robust, scalable, and high-performance platform. The system should support secure content delivery, user management, payment processing, and efficient content administration. The ideal candidate has strong experience with distributed systems, video streaming tech...

I run a RO-based tech agency and I need a technical partner to take over running it. This post is specifically for technical freelancers and consultants who've already been running their own show — winning clients, scoping projects, managing delivery — and want to do it with an existing agency, team, and client base instead of building from zero. If you're a developer or architect who outgrew just writing code and started running your own consultancy, managing clients, and subcontracting to other devs — this is your role. This starts as a freelance engagement with a 2-week paid trial. If it works, this becomes full-time with a base salary + commission on new business. Partner-track, not employee-track. You get: an existing team of developers, active clients, and...

We have an application based on Node JS . We need some work , intergration and ongoing work for it

I need a Node JS service that pulls every piece of live information available on and its Android app (). The feed must refresh virtually every second, covering scores and statistics, detailed player profiles, and full match schedules. Your code should expose the data through robust JSON endpoints while respecting the target platform’s structure. Alongside the scraper, build a lightweight admin panel where I can: • Whitelist or block consuming domains / mobile apps in real time • View scrape and API-access logs at a glance • Add, edit or disable user accounts, assigning granular access rights Please design the solution so it can scale gracefully, use common Node JS tooling (TypeScript, Express, Puppeteer, Cheerio, or similar), and keep response latency low enoug...

My React-based appointment platform is almost ready to ship, but two stubborn issues in the scheduling logic are blocking release: • The time-slot generator sometimes shows options that should be unavailable. • When a user hits “Book,” the request hangs far longer than it should. I need a developer who can dive straight into the existing React frontend (hooks and context), trace the slot-generation flow through to the scheduling API, and deliver a clean, well-tested patch. You’ll verify that only legitimate slots appear under every timezone/working-hours scenario and profile the booking call so the confirmation returns promptly. Deliverables (acceptance criteria) 1. Updated logic that always publishes correct, conflict-free time slots. 2. Booking operat...

I’m adding AirPay to the existing Node.js backend and need a clean, production-ready module that handles straight-forward payment processing. The service must accept credit/debit cards, digital wallets, and bank transfers through AirPay’s API, expose clear endpoints for initiating a charge, capture the asynchronous callback, and return the final transaction status to the frontend. The codebase is an Express app written in modern JavaScript. Please wire the AirPay SDK (or raw REST calls if you prefer) into a dedicated service layer, include middleware for request validation and error handling, and document every environment variable or secret the system requires. Unit tests covering happy-path and typical failure scenarios are essential, and I’ll run test credentials in a...

Tenho um portal próprio construído em React e quero que ele converse de forma nativa com a API do Oneflow. O objetivo é automatizar processos para que o cliente final possa, dentro da área logada, fazer todo o ciclo de “entrar-verificar-assinar-acompanhar” sem depender de ações manuais do meu time. Cenário atual – Portal em React já publicado e com back-end Node. – Credenciais de API e documentação oficial do Oneflow em mãos. O que desejo automatizar primeiro Meu foco principal é o acesso do cliente final, permitindo que ele: • visualize documentos assinados, • consulte o status de cada contrato, • navegue pelo histórico de transaçõ...

Sou cofundador da Fluxus One, startup catarinense dedicada a soluções de Inteligência Artificial, e preciso de um desenvolvedor N8N experiente para trabalhar 100 % remoto na evolução do nosso Agente de Vendas baseado em IA. Hoje o agente já conversa com clientes, processa pagamentos e alimenta o estoque de uma grande marca brasileira; queremos levá-lo ao próximo nível. Principais frentes de atuação • Aprimorar a funcionalidade do sistema de pagamento, o gerenciamento de estoque e a integração com outras plataformas já conectadas. • Adicionar novas camadas de automação de tarefas, relatórios personalizados e um assistente virtual que amplie a experiênc...