Principal Fullstack Engineer

1 month ago

London, United KingdomStaff+

Responsibilities

Own the architecture of Steven.com’s most complex systems from design through production and ongoing evolution.
Set engineering standards, patterns, and abstractions for the broader engineering team.
Architect the AI-native product core, including LLM-powered workflows, intelligent pipelines, and agentic systems.
Make final high-stakes design decisions and identify systemic risks before they become technical debt or downtime.
Mentor senior and junior engineers through code review and architectural discussions.
Translate ambiguous product bets into concrete technical plans with clear tradeoffs in partnership with engineering and product leadership.

Demonstrated experience designing and shipping complex, large-scale distributed systems in production.
Deep full-stack proficiency with TypeScript, React, Node.js, Python, and Google Cloud or AWS.
Production-scale experience architecting AI/ML systems, LLM applications, or intelligent pipelines.
Ability to reason across API design, infrastructure, and product concerns.
Strong written communication and documentation skills.
Background as a founding engineer, staff engineer, or technical lead at a startup or high-growth company is ideal.
A computer science or machine learning research background with production research experience is ideal.
Published research, open-source work, conference talks, or other visible engineering community contributions are ideal.

11-50 employees