Connecting Odds
Lemrock

Founding Full-stack Software Engineer

Lemrock
Paris (hybrid)Posted 12 days agoDiscoveredMatch locked
HybridFull TimeEngineering

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
  • 2+ 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

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. Find more English Speaking Jobs in France on Arbeitnow

Not included in the source posting: what you'll do.

Skills

artificial-intelligencetypescriptbigquerydockergcpllmpostgresqlreactredistailwindterraformui

Who can apply

The employer didn't state any visa, work authorization, citizenship or clearance requirements in this posting. Confirm with the employer before applying.

Read automatically from the employer's posting text. Always confirm with the employer — requirements can change after a job is published.

Apply