Freelance Fullstack Engineer React / Node.js - Freelance
Posted Updated
Summary
Freelance fullstack engineer building and shipping features across a React frontend and Node.js backend for Collective.work's AI-powered recruitment platform — developing scalable APIs, ATS/third-party integrations, and AI-powered capabilities. Onsite in London, UK; day rate to be agreed.
Job description
Context
Collective.work is building the next generation of AI-powered recruitment. The company supports over 20,000 recruiters and headhunters across France, Belgium, Spain, and EMEA, and is expanding its product and distribution in the UK. The platform combines a suite of AI agents — from sourcing and outreach to job posting and ATS integrations — with a database of 800M+ professional profiles and a network of 1M+ active candidates.
Missions- Build and ship product features across the React frontend and Node.js backend.
- Develop scalable APIs, backend services, and integrations with third-party tools, including ATS platforms.
- Integrate AI-powered capabilities into intuitive, high-performance user experiences.
- Improve application performance, reliability, and code quality.
- Collaborate closely with product and engineering teams to deliver features from conception to production.
- React
- Node.js
- JavaScript/TypeScript
- AI APIs and LLM integrations (plus)
- ATS platform integrations
- Location: London, UK
- Type: Freelance / Contract
- Start date: ASAP
- Duration and day rate: To be agreed
- Strong experience with React, Node.js, and JavaScript/TypeScript
- Solid understanding of API design, backend architecture, and database integration
- Experience building and maintaining production-grade web applications
- Familiarity with AI APIs, LLM integrations, or AI-powered products is a plus
- A proactive, product-minded engineer who enjoys taking ownership and shipping quickly