Senior Software Engineer - Fullstack

Fast Company’s Most Innovative Companies of 2024 , and is venture-backed by Redpoint and other leading venture firms. Over half a million members have joined Function to take control of their health. Through comprehensive lab testing, MRI and CT imaging, longitudinal data, and guidance from AI and clinical teams, Function gives members a complete and continuous view of their health — and the clarity to act on it. Through acquisitions across imaging, mobile phlebotomy, and supplement tracking and optimization, Function is building an integrated health platform that spans the full path from testing to health clarity to daily action.

Function recently announced a $298M Series B and is entering its next chapter of growth. As we scale, the quality and durability of our People systems, data, and insights will directly shape our ability to attract, retain, and support exceptional talent. We are growing our team and seeking out world-class talent that deeply believes in our mission to positively impact global health, has a relentless bias toward action, and a growth mindset.

Function fosters a collaborative and dynamic environment where every day we build the future. Role As a Senior Full Stack Developer on the imaging team, you will be a technical leader who architects, builds, and scales the web platforms that power our cancer‑screening experience. You’ll mentor engineers, drive best practices, and ensure that our .NET‑based backend and modern Vue frontend work seamlessly together to deliver reliable, secure, and delightful products that save lives.

We are seeking a collaborative and detail-oriented developer who thrives in a supportive and mission-driven environment. Must have a problem-solving mindset, excellent communication skills, and the ability to clearly articulate technical concepts. This position will align well if you enjoy working as part of a team, have a human-centered approach to technology, and are passionate about the positive impact your work can have on people's health.

Our technical interview process is language-agnostic. Key Responsibilities Join a passionate and collaborative team dedicated to groundbreaking health solutions. Deliver full‑stack solutions, from crafting customer-facing UIs to optimizing database queries and owning the interactions between all layers. Lead design and delivery of end‑to‑end features across the stack, with an emphasis on high‑performance ASP.NET Core services. Architect clean, maintainable, and secure APIs that integrate with EMRs, imaging partners, and AI services.

Mentor & coach other engineers through code reviews, pair programming, and design sessions. Collaborate closely with product, design, and clinical teams to translate requirements into intuitive desktop, tablet, and mobile experiences. Own quality and define automated test strategies (unit, integration, e2e) and champion CI/CD and DevOps in Azure. Drive continuous improvement by introducing best‑in‑class engineering practices, performance tuning, and observability.