# Founding Full-stack Software Engineer at Lemrock

Founding Full-stack Software Engineer at Lemrock in Paris. Hybrid, full-time. Posted August 27, 2026.

- Company: Lemrock
- Location: Paris
- Workplace: Hybrid
- Job type: Full-time
- Experience: 4+ years
- Posted: 2026-08-27
- Apply: https://jobs.ashbyhq.com/lemrock/aee5f0ec-ab44-48e4-bc3d-b4f74e724e81/application
- Source: https://jobmagic.ai/jobs/founding-full-stack-software-engineer-lemrock-0vxw91

## Description

### Who we are

Lemrock builds the infrastructure of agentic commerce.
Tomorrow, consumers won't just buy on e-commerce websites. They will discover, compare and purchase directly inside conversational AI interfaces like ChatGPT, Perplexity, and a growing long tail of specialized AI assistants.
For brands, this is a major shift: if they are not present in these environments, they become invisible.
Our mission: enable any brand to exist, sell and distribute in this new channel.
We raised a €7M seed round (the first in Europe on this market), with Jean-Baptiste Rudelle, founder of Criteo, on our board, and the Bpifrance DeepTech label.
Today, Lemrock is already:

- 100M+ conversations per month

- 150+ brand clients

- a $100B market structuring at high speed

### Context

You'll join a small, high-ownership engineering team building production systems that serve millions of users. We care deeply about code quality and clean architecture — and we intend to keep it that way as we scale.

### Your Mission

Your goal is to build and ship the product that powers Lemrock's commerce infrastructure — with full ownership, from design to production. Concretely, you will:

- **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.

### Candidate Profile

- Strong academic background, proven professional track record, or hands-on entrepreneurial experience

- 4+ years of hands-on software engineering 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

- Comfortable with AI coding tools (Cursor, Claude Code)

- Thrives in ambiguity and 0-to-1 environments — ex-founders or entrepreneurial mindsets are a strong fit

- Professional proficiency in French & English

### Tech Stack

**Core (required)**

- TypeScript, NestJS, React

- PostgreSQL, Redis

- Docker

- Clean architecture patterns (hexagonal, ports & adapters)

**Bonus (appreciated but not required)**

- GCP (Cloud Run, Pub/Sub, BigQuery), Terraform

- Vector databases, embeddings, LLM integrations

- Domain-Driven Design (DDD), CQRS

- TanStack (Router, Query, Table), shadcn/ui, Tailwind, Vite

- Durable workflows (Inngest, Temporal)

### Why Join Us

- Join a company in **early breakout mode**, already generating revenue, with a clear technological edge and strong financial backing to fuel its growth

- Work directly with an **experienced team**: two repeat YC founders who've scaled product & tech before, a former strategy/innovation director (10 years in the sector), and ex-strategy consultants (McKinsey QuantumBlack, BCG)

- Be part of the **next structural shift of the web** — agentic interfaces

- Own **mission-critical topics**, grow fast, and shape the company's future trajectory

### Package

Competitive salary + equity, disclosed during the interview process.