Typescript Engineers (DRWN)

Darwin Recruitment; Paris; Remote; EUR 92,000 - 148,000; Part time

Job summary

Darwin Recruitment is seeking a freelance Senior TypeScript Backend Engineer for a 3-month contract, remote across Europe. You will design, build and iterate backend features end to end, focusing on scalable APIs and AI-powered capabilities built on LLMs and agentic workflows.

Ideal candidates bring senior-level TypeScript backend expertise (Node.js, NestJS/Express or Fastify), strong production-grade delivery experience, and a solid grasp of API design and system integration in fast-paced

Qualifications

• Senior-level, hands-on TypeScript backend experience.
• Production-grade delivery from concept to release.
• Strong API design and system integration experience.

Responsibilities

• Design, build and iterate on backend features end to end.
• Focus on backend services and AI-powered capabilities built on LLMs.
• Collaborate with product and engineering teams in a fast-paced environment.

Skills

TypeScript backend

Node.js

NestJS

Express

API design

LLMs/AI

AI agent framework

Tools

NestJS

Express

Fastify

Job description

Senior TypeScript Backend Engineer (DRWN)

We’re currently looking to hire a Freelance Senior TypeScript Backend Engineer for a 3-month contract, likely to extend.

I’ve included the information below.

• Job title – Senior TypeScript Backend Engineer
• Client Location – Remote, Europe
• Remote work offering – 100%
• Client Industry – Technology / Product Development
• Contract Length – 3 months (likely to extend)
• Contract type – Freelance

Project focus

Two senior, hands-on engineers are needed to join a product development team working on an experimental, high-ambition product initiative. You will independently design, build and iterate on product features end to end, with a strong focus on backend services and AI-powered capabilities built on LLMs and agentic workflows.

Key skills and Experience required

• Senior-level, hands-on TypeScript expertise on the backend (Node.js with NestJS, Express or Fastify)
• Proven delivery of production-grade applications from concept through to release
• Strong API design and system integration experience
• Ability to own features independently with minimal oversight
• Working knowledge of LLMs, agentic AI and AI-powered applications
• Familiarity with AI agent frameworks, orchestration patterns and tool integrations (advantageous)
• Background in fast-paced, experimental product environments (advantageous)

Darwin Recruitment is acting as an Employment Business in relation to this vacancy.

Lungelo Nkosi