Full-Stack Engineer: Own End-to-End AI Commerce Infra

Lemrock; Paris; Remote; EUR 111,000 - 166,000; Full time

Job summary

Lemrock is seeking a freelance Full-stack Software Engineer to join a small, high-ownership team and ship production features from design to production. You will work across backend, frontend, and infra, touching data models, APIs, and interfaces used by millions of users.

You will push code to production within days, write well-tested code, and own end-to-end features. Strong TypeScript and experience with clean architecture are required; French and English proficiency preferred.

Qualifications

• 3+ years of hands-on software engineering experience
• Strong academic background, proven professional track record, or entrepreneurial experience
• Deep proficiency in TypeScript
• Experience with structured backend architectures (DDD, hexagonal, or similar)
• Has owned features end-to-end: data model → API → frontend → deployment
• Professional proficiency in French & English

Responsibilities

• Ship features end-to-end that reach millions of users, from data model and API design to the interface they interact with
• Scale and harden our backend as traffic, integrations, and product complexity grow
• Shape the architecture of the codebase: enforce clean boundaries, maintain modularity, and make decisions that compound as the team scales
• Move fast across the stack (backend, frontend, infra, data), wherever the highest-impact work is on any given week

Skills

TypeScript

NestJS

React

Data modeling

API design

Docker

PostgreSQL

Redis

Clean architecture

AI coding tools

Tools

Docker

PostgreSQL

Redis

Terraform

Job description

Lemrock is seeking a freelance Full-stack Software Engineer to join a small, high-ownership team and ship production features from design to production. You will work across backend, frontend, and infra, touching data models, APIs, and interfaces used by millions of users.

You will push code to production within days, write well-tested code, and own end-to-end features. Strong TypeScript and experience with clean architecture are required; French and English proficiency preferred.