AI Engineer

🚀 AI Engineer – Stealth AI Startup (London / Paris / Europe)

RL/Reinforcement Learning

Location: London/Paris hubs, or elsewhere in Europe with occasional travel to be with the team (remote friendly/hybrid).

Bloom has partnered with one of the fastest-growing AI companies in Europe to help them hire their next phase of AI Engineers and Software Engineers – a rare opportunity to join a team at this stage, with super strong traction and building at an incredible pace.

They’re building the infrastructure for the next generation of AI, where agents learn through active experience in interactive, resettable digital worlds.

What you’ll be working on 🚀

• Build agentic, human-in-the-loop workflows – researching, prototyping, and shipping AI‑driven processes that generate high‑quality data, tasks, and environments for customers.
• Push state‑of‑the‑art performance – define success metrics, run rigorous evaluations, dig into data, and continually improve system reliability and output quality.
• Work at the frontier of AI – apply and innovate on cutting‑edge techniques in agentic pipelines, context engineering, and model tuning/post‑training to maximise system capability.
• Productionise research – partner with software engineering to turn new methods into scalable, observable, high‑impact production features.

If you’re excited by the idea of building the simulation layer for intelligent agents, this is one of those rare moments where you can shape an entirely new category of AI infrastructure.

Please apply or DM me for details – they’re still in stealth, so we’ll share more privately.

Base pay range

Direct message the job poster from bloom.

Seniority level

Mid‑Senior level

Employment type

Full‑time

Job function

Information Technology

Industries

Technology, Information and Media and Health and Human Services