Freelance Full-Stack Web App Developer

This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Freelance Full-Stack Web App Developer in India.

This role offers the opportunity to build and refine interactive, production-ready web applications in a hybrid environment where human engineering expertise is combined with AI-assisted development workflows. You will work across the full stack, developing both frontend interfaces and backend systems for real-world tools such as dashboards, SaaS-like applications, and data-driven web products. The position requires strong architectural thinking, as you will be responsible for ensuring code quality, performance, and maintainability across complete application flows. You will collaborate in a flexible, remote freelance setup, contributing to fast-paced, iterative development cycles. The environment is highly technical and innovation-driven, requiring independence, precision, and problem-solving skills. This is an opportunity to work at the intersection of software engineering and AI-enhanced development.

In this role, you will be responsible for designing, building, and improving full-stack web applications while ensuring reliability, scalability, and clean architecture across all components.

• Develop interactive web applications using modern frontend frameworks (React, Next.js, Vue, or similar)
• Build and maintain backend APIs using Python (FastAPI, Flask) and/or Node.js (Express, NestJS)
• Design and implement data models and persistence layers using SQL or NoSQL databases
• Develop and integrate authentication systems, sessions, and role-based access when required
• Connect third-party APIs and AI/LLM services into application features
• Manage application state, validation, error handling, and loading states across the stack
• Create standalone Python scripts or tools for data processing or backend utilities
• Review, debug, and refactor AI-generated code to ensure correctness, security, and performance
• Write clean, testable code and resolve end-to-end issues across frontend, backend, and database layers
• Contribute to the full lifecycle of feature development from design to deployment

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Requirements:

This position requires strong full-stack development experience and the ability to independently design, build, and ship complete web applications.

• Minimum 3 years of experience in full-stack web development or building production web applications
• Strong proficiency in JavaScript/TypeScript and at least one modern frontend framework
• Solid backend experience with Python (FastAPI, Flask, Django) and/or Node.js (Express, NestJS)
• Experience with relational databases (PostgreSQL, MySQL, SQLite) and schema design
• Strong understanding of REST APIs, authentication flows, and error handling
• Experience with Git version control and basic testing practices
• Familiarity with deployment platforms (Vercel, Netlify, Render, Railway, or similar)
• Ability to work independently and architect end-to-end solutions
• Strong attention to detail and commitment to production-quality code
• Upper-intermediate English proficiency (B2 or above)
• Portfolio of shipped web applications (required)

Nice to have:

• Experience integrating LLM or AI-based APIs into applications
• Experience building AI-assisted or data-driven products
• Background in advanced architecture or scalable system design
• Experience with performance optimization and security best practices

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Benefits:

• Remote freelance work with flexible schedule (task-based 10–20 hours/week estimate)
• Competitive compensation up to $35/hour equivalent, depending on experience and contribution level
• Opportunity to work in a hybrid AI + human development environment
• Hands-on experience building AI-integrated, production-grade web applications
• Exposure to modern full-stack workflows and advanced engineering challenges
• Performance-based opportunities for additional rewards and bonuses
• Work independently with full ownership of features and technical decisions
• Global, remote collaboration environment