Freelance Full-Stack Web App Developer

<img src="https://we-work-remotely.imgix.net/logos/0171/5965/logo.gif?ixlib=rails-4.0.0&w=50&h=50&dpr=2&fit=fill&auto=compress" /> <p> <strong>Headquarters:</strong> Saudi Arabia <br /><strong>URL:</strong> <a href="http://mindrift.ai">http://mindrift.ai</a> </p> <p><strong>Description</strong></p> <p>Mindrift is looking for skilled <strong>Full-Stack Web App Developers (JavaScript/TypeScript + Python or Node)</strong> to join the Tendem project (<a class="external" href="https://tendem.ai/">https://tendem.ai/</a>) and build interactive browser-based applications within our hybrid AI + human environment. In this role, as an AI Pilot – that's how we refer to this position at Mindrift – you'll collaborate with Tendem Agents that handle repetitive tasks, while you provide full-stack engineering expertise, architectural judgment, and quality control to ensure web apps are functional, robust, and ready for real users. This part-time remote opportunity is ideal for professionals with hands-on experience in modern frontend frameworks, backend APIs, databases, and shipping interactive web products end-to-end. </p> <p> </p> <p><strong>What We Do </strong></p> <p>The Mindrift platform connects specialists with AI projects from major tech innovators. Our mission is to unlock the potential of Generative AI by tapping into real-world expertise from across the globe.</p> <p> </p> <p><strong>About the Role</strong> </p> <p>This is a freelance role for a Tendem project. As a Full-Stack Web App Developer, you'll design, build, and refine browser-based applications with real logic, state, persistence, and user input — from habit trackers and budgeting tools to internal dashboards, mini-SaaS tools, and AI-powered apps. You may also work on standalone Python applications and data-processing scripts that sit alongside or behind these products. </p> <p> </p> <p><strong>Key Responsibilities</strong></p> <ul> <li>Build interactive web applications with frontend (React, Next.js, Vue, or similar) and a backend API (Python/FastAPI/Flask or Node/Express).</li> <li>Design and implement data models, schemas, and persistence layers using SQL (PostgreSQL, SQLite) or NoSQL stores.</li> <li>Implement authentication, sessions, and basic role-based access where needed.</li> <li>Integrate third-party APIs and AI/LLM services (OpenAI, Anthropic, or similar) into product features.</li> <li>Handle state management, user input validation, error states, and loading states cleanly.</li> <li>Build standalone Python tools and scripts where required by the task (data processing, API clients, lightweight backend utilities).</li> <li>Evaluate AI-generated full-stack code and refactor it for correctness, security, performance, and maintainability.</li> <li>Write clear, testable code and debug end-to-end issues across frontend, backend, and database.</li> </ul> <p> </p> <p><strong>Requirements and benefits</strong></p> <ul> <li><strong>At least 3 years of relevant experience</strong> in full-stack web development or shipping interactive web applications (required)</li> <li><strong>Bachelor's or Master's Degree</strong> in Computer Science, Engineering, Information Technology, or related technical fields is a plus</li> <li>Candidates should have a strong foundation in full-stack web development, modern frontend frameworks, backend architecture, and building interactive browser-based applications end-to-end. We are looking for specialists who can confidently work across frontend, backend, databases, and APIs, design robust application logic, and refine AI-assisted output into production-ready products. Strong problem-solving skills, attention to detail, and the ability to independently architect and ship complete features are essential</li> <li>Strong command of JavaScript/TypeScript and at least one modern frontend framework (React, Next.js, Vue, Svelte, or similar)</li> <li>Solid backend experience in Python (FastAPI, Flask, Django) and/or Node.js (Express, NestJS)</li> <li>Hands-on experience with relational databases (PostgreSQL, MySQL, SQLite) and basic schema design</li> <li>Experience implementing REST APIs, request validation, error handling, and authentication flows</li> <li>Familiarity with deployment platforms (Vercel, Netlify, Render, <a class="external" href="http://fly.io/">Fly.io</a>, Railway, or similar)</li> <li>Experience integrating LLM APIs or other AI services into product features is a strong plus</li> <li>Comfortable with version control (Git) and basic testing practices</li> <li>Strong attention to detail and commitment to building working, robust products — not demos.</li> <li>Self-directed work ethic with the ability to architect, build, and ship features independently</li> <li>Portfolio of shipped web applications (required)</li> <li>English proficiency: Upper-intermediate (B2) or above (required)</li> </ul> <p> </p> <p><strong>Project time expectations </strong></p> <p>For this project, tasks are estimated to require around 10–20 hours per week during active phases, based on project requirements. This is an estimate, not a guaranteed workload, and applies only while the project is active. </p> <p>