Senior Software Engineer

Member of Technical Staff - Software Engineering

Seed Stage Agentic Infras Start-up

Work directly with some of the world's largest AI Frontier Labs

London | Hybrid

Up to £150k + equity

We’re working with an early-stage AI startup building core infrastructure focused on AI evaluation, structured data workflows, and production-grade operational tooling for frontier AI systems.

The company is building the systems around model performance, combining human-in-the-loop workflows, evaluation tooling, quality control systems, and AI-assisted operations into a scalable platform used within high-stakes environments.

This is a genuine early-stage start-up environment: small team, high ownership, fast execution, minimal bureaucracy, and direct involvement in shaping both product and engineering direction.

This is a highly product-focused engineering role f or a str...