Sr. Engineer, Client Platform; UI Platform

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Postman is the world’s leading API platform, used by more than 40 million developers and 500,000 organizations, including 98% of the Fortune 500. Postman is helping developers and professionals across the globe build the API‑first world by simplifying each step of the API lifecycle and streamlining collaboration—enabling users to create better APIs, faster.

The Client Platform organization provides the paved path for building, testing, and releasing Postman’s web and desktop applications. We own frameworks, design systems, SDKs, build tooling, and shared infrastructure that product engineers depend on every day. The UI Platform group focuses on creating reliable, accessible, and performant UI foundations used across Postman.

As a Senior Software Engineer on the Client Platform team, you’ll help shape the front‑end foundations that Postman relies on. This includes the design system and the reusable components that power both web and desktop experiences. Your work will influence how hundreds of engineers build, improving consistency, performance, and the overall developer experience.

This is a hands‑on role. You’ll build components, help define UI architecture, and partner with engineers and designers to turn ideas into scalable UI systems. In practice, you’ll push the UX layer forward, enabling teams to ship high‑quality features without reinventing core patterns.

• Evolve front‑end architecture, including component libraries, layout patterns, theming, and global UI behaviors
• Implement specialized UI components where needed (e.g., editors, grids, structured data components) with a focus on performance and usability
• Ensure components support accessibility, keyboard interaction patterns, and internationalization/localization standards
• Support product teams in adopting UI Platform components and patterns, providing guidance and identifying opportunities to simplify or extend the platform
• Contribute to documentation, developer tooling, and internal processes that make it easier to build high‑quality UI consistently
• Identify UI‑related technical debt or architectural gaps and proactively drive improvements
• Mentor other engineers, participate in design reviews, and influence technical decision‑making

• You enjoy creating clean, scalable components and UI patterns that others depend on
• You think beyond features and consider how systems evolve. You take ownership of problems, not solutions
• You communicate clearly and listen effectively. You seek new perspectives and build trust with your team and colleagues
• You care about performance, reliability, and the little things that make interfaces feel polished

• 6+ years building UI for complex web applications
• Deep understanding of JavaScript/Type Script and React
• Experience creating and maintaining reusable component libraries or design systems
• Strong knowledge of UI performance, including rendering costs, bundling, and responsive interaction patterns
• Familiarity with accessibility and internationalization principles
• Experience improving developer experience through process, documentation, and/or tooling
• Able to independently lead medium‑to‑large technical projects and contribute thoughtfully to team‑level architectural decisions

Salary and Equity

The reasonably estimated base salary for this role ranges from $220,000 to $240,000, plus a competitive equity package. Actual compensation is based on the candidate's skills, qualifications, and experience.

In addition to Postman’s pay‑on‑performance philosophy and a flexible schedule, our team is supported by an extensive benefit package that includes full medical coverage, flexible PTO, wellness reimbursement, and a monthly lunch stipend. Wellness programs and frequent team‑building events help maintain physical and mental health, while a donation‑matching program supports causes you care about. Postman is building a long‑term company with an inclusive culture that encourages everyone to be their best.

Hybrid Work Model

For all roles based out of the San Francisco Bay…