Senior Platform Engineer

Senior Platform EngineerLocation: New York City (on-site, 5 days) |Salary: $230,000–$275,000 + equityAn AI healthcare company in New York is hiring senior platform engineers to build the backbone that the rest of engineering builds on. This is deep platform work: designing the runtime, the developer framework, and the data model that let application teams ship complex, long-running processes as clean, strongly-typed code.At the heart of the system is a distributed, replayable architecture where every change is captured as an immutable record and rebuilt into read models on demand. You'll shape how that execution engine behaves, how its state is stored and queried, and how engineers interact with it through a well-designed SDK.What we're looking forSeveral years of senior engineering with real depth in distributed systemsHands-on experience with append-only or log-based architectures, command-query separation, or replayable stateAdvanced TypeScript, including the type system itself, and an eye for API and SDK ergonomicsComfort designing schemas, code generation, and the abstractions other engineers rely onA track record of shipping and operating what you build, not just designing itYou need to be a strong engineer who codes. The process includes a live coding exercise and a system design round.Helpful, not requiredBackground in workflow engines, durable execution, or orchestration platformsExposure to healthcare data standards or other regulated environmentsExperience with agent or LLM-driven systemsThe essentialsThis role is on-site five days a week in Midtown Manhattan. There's no hybrid option. Hours are flexible but being in the room is not.Compensation is $230,000 to $275,000 depending on experience, plus meaningful early-stage equity. Benefits include fully covered medical, dental and vision.Visa sponsorship is available for US-based candidates.