About the role

Role Overview

HubSpot is hiring a Principal Software Engineer (Frontend) – Design Systems to lead the technical direction for Trellis, HubSpot’s next-generation design system and component library. This is a deeply hands-on role focused on frontend craft, design quality, and ensuring the design system accelerates product engineering teams.

What You’ll Do

Drive the evolution of Trellis during HubSpot’s 2026 UI modernization and shape the end-to-end product experience.
Partner with Trellis and product teams to deliver a component library with a high visual bar (beautiful, fast, consistent, intentional).
Define an accessibility capability model (controls, toggles, patterns) aligned to user needs.
Build internal tooling to test and iterate on theme and style changes at scale.
Build migration tooling to move Canvas apps to Trellis using codemods, automated refactoring pipelines, and coding-agent workflows.
Make practical decisions on the component library API and abstractions for engineers and designers.
Use coding agents to ship production code and lead complex initiatives end-to-end.
Mentor Staff and Senior engineers and drive frontend thought leadership across the organization.
Align frontend direction with the product roadmap in partnership with engineering leads, PMs, and UX.

What We’re Looking For

14+ years of software engineering experience, with Principal-scope impact.
Deep expertise in React, TypeScript, and modern JavaScript frameworks/architecture.
Experience with modern design system tooling and libraries, specifically BaseUI and StyleX.
Experience developing and shipping a production design system used at scale.
Hands-on builder mindset: write, debug, review, ship, and iterate with feedback.
Fluency with AI coding agents and understanding of how they change frontend development at scale.

Nice-to-Haves / Implied Strengths

Experience with design system theme deployment infrastructure (notably Cloudflare Workers).
Proven ability to lead migration efforts and large-scale refactoring/code transformation pipelines.

About HubSpot

HubSpot builds a customer relationship management (CRM) and customer engagement platform used by businesses worldwide. The company is modernizing its product experience and design systems to support product engineering teams with scalable UI foundations, including AI-augmented development workflows.

Principal Software Engineer, Frontend - Design Systems

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