Senior Full-Stack Engineer

As a Senior Full-Stack Engineer, you’ll design, build, and maintain the systems that power Duet’s customer-facing products. This is an IC-heavy role focused on backend architecture and workflow logic, with enough frontend exposure to ensure excellent end-user experiences. You’ll report directly to the founding team.

You’ll work on the systems that enable rule-driven and customer-configured automation, web-based experiences for clinic staff, and operational workflows that replace manual, error-prone processes.

This role sits at the intersection of product, data, and systems engineering, and is ideal for someone who enjoys building flexible primitives that multiple products can be composed from.

What You’ll Do:

Build Product-Enabling Systems. Design and implement backend systems that support configurable workflows and automation. Create primitives that allow multiple products to be built on top of shared logic. Balance flexibility with simplicity so systems remain understandable and maintainable.

Turn Services Into Software. Work closely with operations and product to understand how work is done today. Identify patterns in manual processes and translate them into durable software abstractions. Iterate quickly based on real usage from practices.

Own Quality & Reliability. Write thoughtful tests for workflow logic and core systems. Debug production issues and improve systems based on failure modes. Ensure changes are safe, observable, and reversible.

Set the Software Foundation. Influence architectural decisions and engineering standards. Help onboard new engineers and contribute to a culture of ownership and clarity. Act like a builder, not a ticket-taker.

What We’re Looking For:

6+ years of experience building production web-based software.

Strong background in backend or full-stack engineering, with experience working on systems that support complex business logic or workflows.

Proficiency in Python, Javascript, and experience building and consuming RESTful APIs.

Comfort working across the stack, with backend as your strength.

You’re comfortable with rule-based and user-configured systems.

Nice To Haves:

These aren’t required, but healthcare or billing experience will meaningfully accelerate your impact. Similarly, experience turning internal tools or services into customer-facing products, or building data-heavy admin tooling, maps directly to what we’re doing.

What this role offers:

High ownership: Build foundational systems as an early engineer, reporting directly to founders.

Real users: Clinics use what you ship every day.

Product-led: You’ll work on features customers actually see and feel.

Mission-driven: Support independent primary care at a critical moment.

This role is hybrid in NYC (in office Monday-Wednesday).