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  • Lemrock

    Paris

    • 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

    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.

    Jobs at Lemrock

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