# Founding Full-stack Software Engineer at Lemrock

> Hybrid · France · Unspecified · Full-stack · open. Source: https://alderhq.app/jobs/ashby%3Alemrock%3Aaee5f0ec-ab44-48e4-bc3d-b4f74e724e81 (read 2026-11-06).

## Facts (observed)

- Company: [Lemrock](https://alderhq.app/companies/lemrock)
- Location text: Paris
- Where it can be done from (inferred): Hybrid · France (evidence: "Location: Paris")
- Posted: 2026-08-27 (71 days ago)
- First seen by alder: 2026-11-02 · last verified: 2026-11-03
- Reposted: 0 times · edited: 0 times
- Apply on the employer's site: https://jobs.ashbyhq.com/lemrock/aee5f0ec-ab44-48e4-bc3d-b4f74e724e81
- Skills listed (inferred): TypeScript, React, CSS, NestJS, PostgreSQL, Redis, GCP, Docker, Terraform, LLMs

## Pay and sponsorship

- Posted pay: not posted
- Market band for similar posted roles (Paris, n 17): p25 €21k, median €45k, p75 €45k

## Description (the employer's text)

### 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.

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Data: alder (https://alderhq.app). Cite https://alderhq.app/jobs/ashby%3Alemrock%3Aaee5f0ec-ab44-48e4-bc3d-b4f74e724e81 and the date you read it. Observed facts come from the employer's own listing; location reach, level, family and skills are inferences.