Senior Software Engineer

ABOUT THE ROLE Join a well-funded AI and robotics startup tackling some of the hardest open problems in the field. This is a senior individual contributor role for engineers who are obsessed with novel, technically difficult challenges — the kind that don't have existing solutions. You'll work across systems-level infrastructure, real-time AI state management, custom OS development, and UX grounded in human psychology and organisational behaviour. WHAT YOU'LL DO - Design and build custom database and memory systems from scratch. - Implement real-time LLM token state management at large scale. - Develop custom Unix OS distributions tailored for both humans and AI agents. - Rethink UX paradigms using insights from organisational behaviour and human psychology. - Pursue compounding micro-optimisations across the full stack. - Work onsite 5 days a week in San Francisco. WHAT WE'RE LOOKING FOR - Required: Deep obsession with novel, overlooked, or technically unsolved problems. - Required: Demonstrated ability to build large, complex, and maintainable systems in roughly one-third the time most engineers consider possible. - Required: Proficiency in one or more of: TypeScript, Rust, Python. - Required: Experience with graph databases, flexible data pipelines, or ontological modelling. - Comfort applying psychology and organisational behaviour insights to product and UX decisions. - Signal of outlier intelligence — top academic background or standout real-world experience (non-traditional backgrounds welcome). COMPENSATION & BENEFITS - Cash compensation: $200,000 – $400,000 USD annually - Variable equity on top of cash - Visa sponsorship available LOCATION On-site in San Francisco, CA (South Park neighbourhood). This is a fully in-person role — remote work is not available.