Senior Software Engineer

About the Role

Jetty is building the first AI functional health doctor and coach—starting with the hardest use case: people living with chronic illness. As a Founding Engineer, you'll own the product and engineering systems that turn Jetty's intelligence into something people genuinely trust and use every day. You'll join a live product with active users, write production code from week one, and help define the architecture for deep, long-term health intelligence—the kind that compounds with every interaction.

What You'll Do

• Ship core product features end-to-end—from backend logic to the user-facing experiences that make Jetty faster, smarter, and more intuitive for people managing chronic illness
• Own the engineering foundations that let a small team move quickly and confidently: APIs, data models, testing frameworks, deployment pipelines, and the systems that connect product, mobile, and AI
• Build for reliability and privacy—design systems that scale gracefully, protect sensitive health data, and fail safely; own CI/CD, observability, and monitoring as usage grows
• Set the technical bar for code quality, architecture decisions, and engineering culture—create an environment where speed, craftsmanship, and pragmatism coexist
• Partner closely with the founding team—including product, design, mobile, and AI—to translate ambiguous ideas into shipped, production-ready features
• Make smart build tradeoffs—know when to invest in foundations that compound over time and when to move fast with a simple solution; you'll do both every week

What You'll Bring

• 3–8+ years of experience building software products, with meaningful time in fast-moving startup environments
• Strong full-stack fundamentals with depth in backend engineering—you can own and ship features end-to-end without heavy scaffolding
• Demonstrated experience building reliable systems: REST or GraphQL APIs, relational data models, testing frameworks, CI/CD pipelines, and production observability
• Strong product instincts—you think about what users need, not just what's technically correct, and you're comfortable shaping decisions alongside non-engineering stakeholders
• Proven ability to operate in early-stage ambiguity: you make pragmatic decisions, unblock yourself, and ship
• Nice to Have:
• Experience with Swift, React Native, or other mobile/frontend development
• Experience building privacy-sensitive or health-related products (HIPAA familiarity is a plus)
• Proficiency in strongly typed or compiled languages such as Go, Rust, or Java
• Experience building AI-native products or integrating LLM-powered workflows into production systems

Why Join Jetty

• Outsized ownership from day one—you'll shape not just the codebase but the engineering culture, architecture, and product direction of a company at its most formative stage
• Mission that matters—you'll work directly with a former senior AI leader from Palantir and a former NEA venture investor, backed by the top seed investor in NYC with $2M+ raised
• Meaningful compensation—a competitive salary and a real equity package that reflects your founding-level contribution