Principal Software Engineer, Frontend - Design Systems

14+ years of software engineering experience, with a track record of Principal-scope impact on your organization’s most critical business and customer needs

Deep expertise in React, TypeScript, and modern JavaScript frameworks, architecture,  and infrastructure.

Experience with modern component libraries and tooling, we’re using BaseUI, and StyleX, and our theme deployment infrastructure leverages Cloudflare Workers

Experience developing and shipping a production design system that is used at scale

You lead by writing, debugging, reviewing, shipping, and thrive on feedback

Fluency with AI coding agents, and a perspective on how they change frontend development at scale, and a belief that they will

We're looking for a Principal Software Engineer to lead the frontend technical direction for the Trellis design system and component library.

This is a deeply hands-on role for a builder who loves frontend craft, cares about design quality, but understands that the design system has to serve product engineering’s needs.

You know that a design system only has value when it is being used by product teams, it accelerates their development, and that the default outcome is a world class customer experience.

Principal Engineers at HubSpot go deep on the organization's hardest problems and see them through.

Once Trellis reaches maturity, you'll have the opportunity to take that expertise and influence to the next highest-leverage area across Frontend Engineering.

Drive the evolution of the Trellis design system during HubSpot's 2026 UI modernization, shaping the entire product experience

Hubspot is in the middle of an ambitious evolution from our current Canvas design system, to our new design system, Trellis. The Trellis design system is a theme change, a modern component library leveraging open source packages (Base UI and StyleX), and defines new UI/UX patterns for use across all of HubSpot’s customer facing applications. The end goal is to provide a foundation to our hundreds of product engineering teams, assisted by coding agents, to build a world class customer experience. This is a rare moment to shape the HubSpot product experience, used by over 250,000 paying customers and millions of users, from the design systems foundation itself.