AI Engineer — Conversion & Agentic Pipelines

Lemrock; Paris; On-site; EUR 74,000 - 129,000; Full time

Job summary

Lemrock is accelerating its product where shoppers talk to AI agents before buying. As our freelance AI Engineer, you will dig into our data to find what drives conversion, then build the pipelines that act on it. You will work directly with the founders and the product and engineering teams.

Understand data sources, turn raw conversations into signals, train small models, and size their impact. Design agentic pipelines, measure with AB tests, and ship improvements to production when you can.

Qualifications

• 3+ years of experience in data science, with progression to LLMs and agents.
• Built agents or LLM pipelines and measured their success.
• Solid data science foundations: SQL, Python, statistics, A/B testing.

Responsibilities

• Understand what drives conversion by analyzing conversations, events, and metadata.
• Build agentic pipelines to prioritize products, prepare them, and improve recommendations.
• Measure changes with A/B tests and evals; feed results back into the loop.
• Ship production changes yourself when possible; otherwise hand off to engineering.

Skills

Data science

LLM pipelines

SQL

Python

A/B testing

Statistics

Autonomous

French + English

Tools

BigQuery

PostHog

Job description

Lemrock is accelerating its product where shoppers talk to AI agents before buying. As our freelance AI Engineer, you will dig into our data to find what drives conversion, then build the pipelines that act on it. You will work directly with the founders and the product and engineering teams.

Understand data sources, turn raw conversations into signals, train small models, and size their impact. Design agentic pipelines, measure with AB tests, and ship improvements to production when you can.