API RESTful Jobs

Estoy llevando adelante una iniciativa tecnológica reservada y necesito reforzar exclusivamente el frente móvil. El backend y la capa web ya están encaminados; tu misión será diseñar y levantar una aplicación híbrida que funcione con el mismo nivel de fluidez tanto en iOS como en Android. Busco a alguien que domine al menos un framework híbrido moderno—React Native, Flutter o Ionic son bienvenidos—y que tenga criterio para integrar APIs REST, pasarela de pago y sistemas de autenticación seguros. Valoro, además, buenas prácticas de versionado (Git), pruebas continuas y atención a la escalabilidad. Antes de compartir la arquitectura y las credenciales firmaremos un NDA. Si te interesa, en...

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...

Full-Stack MERN E-Commerce Store Development Looking for an experienced MERN stack developer to build a complete e-commerce platform. Tech Stack: Frontend: React 18, Redux Toolkit, Tailwind CSS, Vite Backend: Node.js, Express, MongoDB, Mongoose Authentication: JWT with bcrypt Payment: PayPal integration Additional: React Router, React Toastify, ApexCharts Key Features Required: User authentication & authorization (admin/customer roles) Product management (CRUD operations, categories, image uploads) Shopping cart & checkout flow Order management system User profiles & order history Admin dashboard with analytics Product reviews & ratings Favorites/wishlist functionality Responsive design Deliverables: Fully functional frontend and backend RESTful API with proper middlew...

Je souhaite moderniser de fond en comble notre portail de gestion du Financement Basé sur la Performance actuellement sous une ancienne version de CodeIgniter. L’objectif est de repartir sur CodeIgniter 4 et de livrer une plateforme robuste, performante et sécurisée, prête à évoluer. Portée technique • Backend : réécriture complète sur CodeIgniter 4, architecture propre et testable, services RESTful structurés. • Frontend : interface riche en fonctionnalités avec un design responsive et une expérience utilisateur fluide (tableaux dynamiques, filtres avancés, tableaux de bord). • API : exposition d’une API REST sécurisée, versionnée, document&...

I’m ready to move from concept to a working Android-only ride-hailing application built with React Native. Both drivers and riders will use the product, so the codebase, navigation flow, and backend need to cleanly separate (and securely share) the two experiences. Core features I need implemented (or, where partially done, completed and iron-clad): • Google Maps + OpenRouteService for real-time routing • From/To address search through Google Places Autocomplete • Accurate polyline rendering with distance and duration read-outs • Dynamic driver list that shows car model, rating, next available slot, and price • Fare calculation that changes automatically for Luxury, AC, and Non-AC vehicles • Ride search updates and alert notifications so ri...

Payments on my store are intermittently failing at the PayPal checkout stage—customers see an error after clicking “Pay Now” and the order never records in the system. Everything else on the site runs smoothly, so the issue is isolated to the payment flow. I need a developer who understands the PayPal REST API, IPN/webhooks and typical WooCommerce-style (PHP) integrations to: • trace where the transaction breaks, • restore reliable authorisation and capture, and • test live and sandbox modes to confirm stability. Please be comfortable working on a live e-commerce environment, backing up before touching core files or gateway settings, and providing a concise summary of what was fixed so I can maintain it going forward.

We are looking for an experienced Shopify developer to build a small custom backend app (not theme editing) to integrate our Shopify store with an external authentication service API (LegitApp). This is a glue/automation project — the external service already handles all UI and workflows. We only need backend integration. Customer Flow Customer purchases an “Authentication Service” product on Shopify (category-based pricing) After order is paid, our backend should: Call external API to create an authentication intent Receive a hosted submission URL Save intent ID, submission URL, and status to Shopify order metafields Email customer with submission link Customer completes submission on the external hosted page (photos etc handled externally) External service sends webh...

I need a complete, production-ready number-prediction web application built from the ground up. The core game lets players pick a number from 1–9, choose a colour (Red, Green, Violet) or Big/Small, and receive a 9× payout on an exact hit. Results must be generated automatically and provably random. The platform will run on Laravel with a MySQL database. Users register and log in with email-and-password authentication, fund their in-site wallet through Razorpay, and can request withdrawals between 100 – 50,000. Each account shows real-time balance updates and a full transaction history. An admin panel should allow me to view, approve, or decline deposits and withdrawal requests, manage user profiles, and monitor all gameplay rounds. Security, input validation, and clea...

I am rebuilding my sales stack around Zoho CRM and its RPM add-on and need a specialist who can get everything talking to each other smoothly. The essentials include: • Structuring the CRM and RPM modules so my pipelines, custom fields, and scoring rules line up exactly with our current sales process. • Establishing clean API connections—both inbound and outbound—to the third-party platforms we already rely on (marketing automation, billing, and a proprietary dashboard), using REST where available and Deluge when it makes more sense. • Documenting each endpoint, key, and trigger so my in-house developer can maintain it without digging through code later. Acceptance criteria • All mapped fields sync bidirectionally without data loss. • API call...

I need a clean, well-structured ASP.NET REST service that processes static infrastructure data stored in a SQL database. The service must expose endpoints to create, read, update and delete the records, returning JSON throughout. Key points • Technology stack: ASP.NET (Core preferred) with Entity Framework (Code First or Database First—use what lets you move fastest) and Microsoft SQL Server. • Data model: a small set of tables representing our infrastructure items; I will supply the exact fields once we start, but plan for typical ID, name, location and status columns. • Endpoints: /items (GET list, POST create), /items/{id} (GET, PUT, DELETE) plus any helper routes you feel are useful. • Processing rules: basic validation (unique names, non-null locat...

Senior Laravel Developer Needed for Gaming API Development (Complex Business Logic) We are looking for an experienced PHP Laravel developer to build a robust Gaming API system involving complex business logic, statistical computations, and dynamic result generation. This is a backend-heavy project requiring strong analytical skills and experience implementing structured business rules. The frontend will be developed in React JS, and the database will be MySQL. Technology Stack (Mandatory) : - Backend: PHP (Laravel Framework) Frontend: React JS (API consumption only) Database: MySQL API Type: RESTful APIs Architecture: Clean, scalable, and well-documented Scope of Work : - The developer will be responsible for: Designing and developing secure Gaming APIs in Laravel Implementing...

Build a full-stack web application using the MERN stack (MongoDB, , React.js, Node.js) named Engineering Placement Management Platform. The system must support three role-based authentications: 1) College 2) Student 3) Company with separate registration and login using JWT authentication and role-based authorization. The UI must be clean, modern, fully responsive, and support both dark and light themes. 1) College Module (Main Admin): 1.1) View registered companies. 1.2) View their students. 1.3) Track students’ interview progress with detailed analytics (rounds cleared, failures, placements, company-wise statistics). 1.4) Create and manage placement drives. 1.5) Notification system to inform students about drives. 2) Student Module: 2.1) Register and login. 2.2) Create and manag...

I need a Java developer who already knows their way around the Toshiba TCxSky ACE POS platform. The immediate goal is integration with other systems so the store data can move cleanly in and out of the POS. Depending on how the rollout unfolds, this may touch Inventory management, Payment gateways, or even CRM systems, but for the first milestone I want the core integration framework in place and demonstrably stable. Please show me past work that proves you have handled similar Java-based integrations—especially anything involving retail, POS APIs, or middleware such as XML, REST, or SOAP services. Screenshots, short code snippets, or links to live environments are all helpful. If you have tackled TCxSky or older Toshiba/IBM POS stacks before, highlight that up front. Deliverable: ...

I’m expanding a fully cloud-native Java micro-services platform and need a seasoned developer to work alongside me on building brand-new features. The stack is Java (Spring Boot, React ), containerised with Docker and orchestrated on Kubernetes, with everything running in the cloud. Your focus will be twofold: 1. User-interface enhancements – i have idea , so you’ll translate those visuals into responsive, maintainable front-end code that plugs neatly into our micro-front-end architecture. 2. Back-end service extensions – you’ll design and code new micro-services or extend existing ones, exposing RESTful endpoints and integrating them into our event-driven ecosystem. We’ll collaborate through Git, conduct code reviews, and push continuously vi...

We are looking for an AI Red Teaming Engineer / Vibe Coding Engineer to work directly on our internal safety evaluation platform for AI models, with a focus on model-to-model testing (no real users involved). Your role will be to design and run adversarial evaluations against AI systems, simulate realistic personas and conversations, and help us detect and categorize safety failures (guardrail breaks, emotional risks, harmful content, etc.) in AI products designed for children and families. You will also collaborate on improving the underlying platform and evaluation pipelines. Responsibilities: Design model-to-model red teaming tests targeting: Unhealthy emotional attachment behaviors Harmful or unsafe content Manipulative or coercive responses Other child-safety-related risks Cre...

I’m expanding our software team and need an experienced ASP.NET developer who can focus full-time on building brand-new mobile applications from the ground up. Your work will revolve exclusively around new feature development—no legacy maintenance—so you’ll get to shape architecture decisions, choose modern patterns, and drive best practices. We’re a fully remote company; you’ll collaborate daily with product managers, UX designers, and back-end engineers through Azure DevOps, Git, and Teams. A typical sprint involves designing RESTful APIs in ASP.NET Core, integrating them into a Xamarin or .NET MAUI front end, writing unit tests, and pushing clean, well-documented code through our CI/CD pipeline. To thrive here you should be fluent in C#, comfortable...