Senior Software Engineer (SF)

Requirements

• ABOUT FRACTIONAL AI How do you turn a decades-old dataset into an industry-leading medical coding agent? Teach an AI receptionist to book appointments in Spanish? Automatically generate working data connectors from API docs? Build agents that write, test, and deploy their own software packages? Fractional AI is a startup in the heart of Silicon Valley targeting the biggest greenfield opportunity in the economy: transforming companies with AI software at a scale the market is only beginning to understand.
• THE ROLE This role is designed for strong software engineers who want to ship AI products end-to-end across a range of domains, with meaningful ownership from day one.
• You'll work on a small, high-caliber team (2–5 engineers and a PM) building AI products for our clients, from
• You’ll own features end-to-end, and develop domain expertise across a range of AI use cases.
• To make this possible, we are religious about being the best company in the world to learn Applied AI engineering practices. WHAT YOU BRING -
• Exceptional signals elsewhere (AI evangelism, OSS contributions, founder experience) can substitute. - Specific interest in applying software engineering fundamentals to AI systems.
• OUR ENGINEERING PHILOSOPHY We're opinionated about what works in production, and we write about it — from why most eval setups fail https://engineering.fractional.ai/your-evals-have-a-rotten-tomatoes-problem by collapsing everything into a single score, to why defaulting to chat interfaces https://engineering.fractional.ai/stop-designing-chatbots limits AI's impact.
• We have a distinct approach to building AI systems: applying standard software engineering discipline to the non-deterministic world of frontier AI.
• After shipping 30+ AI products, we have strong opinions on what makes AI products succeed and how to get them into production.
• We think you'll find it refreshing if you've seen how most companies approach AI.
• The upside is constant time on the frontier of models and tooling, and a muscle for AI product development that's hard to build anywhere else.
• OUR VALUES - Overdeliver: We are writing the playbook on how to create enterprise value with LLMs, and building our reputation as the world’s best applied AI team.
• - Overuse AI: We go out of our way to experiment with the latest tools and share what we learn with our teammates - building a culture at the frontier.

Experience