Senior Software Engineer (C# / SQL Server)

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

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 strong full-stack eng ineer who enjoys building complete products ...