Senior Full-Stack Engineer

Remotefull timeRemote

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senior

$175k–$200k

H1B: no

Ascertain The Senior Full-Stack Engineer at Ascertain builds and ships product features across the stack, including backend services and user-facing web applications. This role involves working with React, TypeScript, Python, and FastAPI to develop healthcare AI platform components.

Responsibilities

As a Senior Full-Stack Software Engineer at Ascertain, you'll ship product across the stack—from backend services and data infrastructure that power Ascertain’s healthcare AI platform to the web app that our partner operations team members use every day. You'll join a growing team of engineers, with real ownership over what we build, how we build it, and the engineering culture we grow into.
We're headquartered in New York City with a hybrid team there, plus remote engineers across the U.S. and Brazil. We operate with high autonomy, shared accountability, and deep respect for the people who use our software.
Own product features end-to-end, from design through production.
Build user-facing experiences in React and TypeScript.
Design and ship backend services with Python and FastAPI.
Partner with product, design, and engineering peers to turn fuzzy problems into shipped software.
Raise the bar in code review and help shape our engineering practices.
Improve our development processes as we grow—testing, CI/CD, observability—the things that compound over time.

Qualification

Familiarity with RedisBackground in ambiguousMeaningful overlap with U

Required

5+ years strong full-stack experience with Python (FastAPI or similar) and TypeScript with React.
Comfort designing schemas and writing non-trivial SQL against relational databases (we use PostgreSQL).
Working knowledge of containerization (Docker) and CI/CD pipelines.
Familiarity with Redis, queueing systems, or other parts of a modern production stack.
Experience building and operating production systems in a cloud environment (we use GCP).
Ability to communicate clearly in English, written and verbal—most async work happens in writing, and you'll regularly join meetings with U.S.-based teammates.
Background in ambiguous, early-stage environments where you've had to take ownership without much scaffolding.
Meaningful overlap with U.S. Eastern business hours during the workday.
You're excited—not just willing—to learn new things, push past your comfort zone, and ship in a fast-moving environment. You communicate clearly, take ownership without being asked, and care about the people on the other end of your code.

Preferred

Experience in regulated environments (healthcare, fintech, etc.) and a security-minded approach to design.
Infrastructure-as-code experience (Terraform).

Benefits

Medical
Equity/RSU

Company

Ascertain

View company page

Source: ashby

Active within the past hour

Remote-friendly

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PythonFastAPITypeScriptReactSQLPostgreSQL

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Senior Full-Stack Engineer at Ascertain · LumiJobs