Senior Software Engineer

About the role

As a Senior Engineer, you own meaningful parts of the product end to end: you design them, build them, ship them, and keep them running. You'll work in the systems at the heart of the coach — the AI and agent logic, the services behind it, the data it depends on — and you'll make the day-to-day architecture and trade-off calls within your domain. You'll do this with a high degree of autonomy, and you'll help raise the bar for the engineers around you. Comfort with ambiguity matters here: the work rarely arrives fully specified.

What you’ll do

• Own meaningful features and services end to end — design, build, ship, and operate them in production
• Contribute to architecture decisions in the systems you work in, including the AI/agent and product systems at the core of the coach
• Write high-quality, well-tested, observable code, and help others do the same through reviews and pairing
• Treat privacy, security, and the responsible handling of health data as part of doing the job well
• Break ambiguous product problems into shippable work, making pragmatic trade-offs to deliver
• Partner with product, design, and the Data org to turn requirements into working software
• Mentor earlier-career engineers and lift the quality bar on your team

What we’re looking for

• 5+ years building and shipping production software
• Strong engineering skills with the ability to own a feature or system end to end — backend services, APIs, and the code that ties them together
• Experience operating what you build: testing, deployment, and observability
• Comfort with ambiguity within your domain — able to move from a rough problem to a shipped solution
• Clear communication and the ability to work well across product, design, and engineering
• A genuine interest in improving healthcare alongside an interdisciplinary team
• Able to work from our San Francisco office a minimum of 2 days per week

Bonus Points

• Experience with Kotlin, TypeScript, React, and Flutter
• Experience with AI/LLM product systems or agents
• You've worked with healthcare data, or in another high-trust, regulated domain
• Mobile experience, or experience bridging mobile clients and backend systems
• Experience shipping in an early-stage or fast-moving consumer product