Full-Stack Developer (Node.js, TypeScript, React, Next.js) — AI-Assisted Development

Madfish; Remote; GBP 60,000 - 80,000; Full time

Job summary

A technology company in the United Kingdom is seeking a Full-Stack JavaScript/TypeScript developer. In this role, you will build robust web applications using TypeScript, React, and Next.js while improving AI-generated code with Lovable.dev. Strong proficiency in backend technologies and UI design is essential. You will implement key functionalities, ensuring security and performance, all while working in a fast-paced, collaborative environment. The ideal candidate thrives on shipping fast and has excellent problem-solving abilities.

Qualifications

• Strong proficiency in TypeScript, React, Next.js, and modern frontend workflows.
• Experience with Supabase (Auth, RLS) or PostgreSQL.
• Understanding of Prisma, serverless backend patterns, and API architecture.

Responsibilities

• Build full‑stack web applications using TypeScript, React, and Next.js.
• Work extensively inside Lovable.dev to refine and debug AI‑generated code.
• Implement backend logic using Node.js and API routes.

Skills

TypeScript

React

Next.js

TailwindCSS

UI experience

Debugging skills

Independent work

Tools

Lovable.dev

Supabase

PostgreSQL

Prisma

Job description

We’re looking for a strong Full-Stack JavaScript/TypeScript developer who is comfortable working in modern AI-assisted environments—especially Lovable.dev, which will be used heavily in this role.

If you enjoy shipping fast, improving AI-generated code, and turning messy drafts into polished production features — you’ll thrive here.

Responsibilities

• Build full‑stack web applications using TypeScript, React, and Next.js (App Router)
• Work extensively inside Lovable.dev: refining, debugging, and extending AI‑generated code
• Implement backend logic using Node.js, serverless functions, and API routes
• Model data, authentication, and RLS using Supabase, PostgreSQL, and Prisma
• Build UI components using TailwindCSS and shadcn/ui
• Integrate third‑party APIs, webhooks, and external services
• Ensure best practices for security, performance, and maintainability
• Collaborate through Lovable’s AI‑driven workflow (prompts, commits, pull requests)
• Provide clean documentation for future developers

Required Skills

• Strong proficiency in TypeScript, React, Next.js, and modern frontend workflows
• Experience with Supabase (Auth, RLS) or PostgreSQL
• Understanding of Prisma, serverless backend patterns, and API architecture
• Strong UI experience with TailwindCSS and shadcn/ui
• Ability to work efficiently inside Lovable.dev and improve AI‑generated code
• Excellent debugging and problem‑solving skills
• Ability to work independently and ship quickly

Nice to Have

• Experience with AI‑assisted coding tools (Lovable, Cursor, Replit Agent, Claude Code, Bolt)
• Familiarity with deployments via Vercel or Supabase hosting
• Understanding of AI agent workflows, vector databases, and embeddings
• Knowledge of modern authentication flows (OAuth, magic links, JWT, role‑based access)