Staff Software Engineer (Fullstack)

Refactor.; New York (NY); On-site; USD 144,000 - 240,000; Full time

Job summary

Refactor. is seeking a Staff Full Stack Engineer to lead and contribute hands-on across a complex AI healthtech platform in New York City.

You will own architecture, influence engineering decisions and drive production-grade systems from frontend React/TypeScript to backend services and data-heavy workloads. You’ll mentor senior engineers, promote modern engineering practices, and collaborate with product, design, back-end and AI teams to deliver reliable, scalable software with strong

Qualifications

• 10+ years of software engineering experience, with Staff-level ownership.
• Strong frontend architectural judgement in React/TypeScript.
• Backend experience with APIs, databases and distributed systems.
• Cloud infrastructure knowledge (AWS), Docker/Kubernetes and CI/CD.

Responsibilities

• Own the architecture and delivery of complex full-stack systems across frontend and backend.
• Build and scale production React and TypeScript applications with strong UX focus.
• Design robust APIs and data models supporting complex workflows.
• Set engineering patterns and mentor engineers while writing production code.
• Collaborate with product, design, backend and AI teams to ship features.

Skills

10+ years experience

Frontend architecture

Backend with Python/Node/TS

Cloud infra (AWS)

Mentoring

Tools

GraphQL

PostgreSQL

Kafka

Job description

Staff Full Stack Engineer | AI Healthtech | NYC | Up to $240k + Equity

The Company

I'm working with a fast-growing Series B healthcare technology company in New York that is building software to solve some of the most complex problems in US healthcare.

Their platform combines large-scale backend systems, data-heavy workflows and AI to help healthcare organisations improve accuracy, reduce waste and automate difficult processes.

They're scaling their engineering team and looking for an experienced Staff Full Stack Engineer who can take genuine ownership of major technical challenges across the platform.

This isn't an architecture-only position. They want someone who can set technical direction, influence engineering decisions and remain genuinely hands-on.

The Role

You’ll play a key role in building and scaling the applications that sit at the centre of the company's AI-powered healthcare platform.

This includes sophisticated React applications, complex operational workflows, backend services and data-intensive systems where performance, accuracy and reliability are critical.

You’ll have significant autonomy to make architectural decisions, improve engineering standards and influence how the wider team builds software.

Key responsibilities:

• Own the architecture and delivery of complex full-stack systems, from frontend applications through to backend services.
• Build and scale production React and TypeScript applications, focusing on performance, component architecture, state management and user experience.
• Design robust APIs, backend services and relational data models supporting complex operational workflows.
• Make important system design decisions and establish engineering patterns across multiple teams.
• Work closely with product, design, backend and AI engineers to deliver intuitive applications powered by sophisticated backend systems.
• Champion modern engineering practices, including AI-assisted development, automated testing, observability and CI/CD.
• Mentor senior engineers, lead technical discussions and raise engineering standards while continuing to write production code.

What They’re Looking For

• 10+ years of software engineering experience, including genuine Staff-level technical ownership.
• Strong frontend architectural judgement, including reusable components, state management and application performance.
• Solid backend engineering experience with Python, Node.js or TypeScript, including APIs, databases and distributed systems.
• Experience architecting and delivering complex production applications end-to-end.
• Strong system design and cloud infrastructure knowledge, ideally AWS, Docker, Kubernetes and CI/CD.
• Proven experience mentoring engineers, influencing technical decisions and working effectively across teams.
• A strong product engineering background, ideally within high-growth technology companies or engineering-led startups.
• Someone who communicates clearly, makes thoughtful technical trade-offs and still enjoys getting into the code.

Additional experience that would stand out:

• Building AI-powered applications, LLM integrations, agentic workflows or conversational interfaces.
• Healthcare, fintech or other regulated, data-intensive environments.
• B2B SaaS products involving complex operational workflows.
• GraphQL, PostgreSQL, Kafka or distributed data processing.
• Using AI coding tools such as Claude Code to improve engineering productivity.

The Opportunity

This is an opportunity to join a well-funded, growing engineering organisation at a point where individual engineers can still have a significant influence over the product and technical direction.

You’ll work on difficult engineering problems, help shape architecture across the stack and have the autonomy to build systems properly.

It’s particularly well suited to someone who wants the influence and ownership of a Staff Engineer while remaining closely involved in writing and shipping code.

Location:

New York City – 3 days per week onsite.

Salary:

Up to $240,000 base + equity.