Staff Frontend Engineer (Europe)

About Polar

About the Role

What You’ll Do

• Shape the future of billing for developers - starting by designing APIs and SDKs that feel like magic, and working backwards through backend, infrastructure, operations, and even business needs to make it real

• Build and ship delightful UIs and dashboard features using TypeScript, React, and Next.js

• Design and maintain open source packages - components, hooks, and libraries that developers use to build custom billing experiences (think Shadcn for billing)

• Define front-end standards and architecture across our codebase

• Continuously improve performance, reliability, and developer experience across all surfaces

About You

• 5+ years of experience building high-quality front-end applications, libraries, and SDKs

• Highly proficient in JavaScript/TypeScript; comfortable across multiple frameworks

• Deep experience with React and Next.js

• Passionate about developer experience and designing world-class SDKs/APIs

• Excellent problem-solving skills and a clear communicator

• Proven track record in fast-paced, high-autonomy startup environments

Bonus Points

• You’ve shipped your own open source libraries or contributed meaningfully to others

• You’ve built and monetized side projects or run your own startup

• You care deeply about your craft—delightful animations, thoughtful edge-case handling, and developer-first ergonomics

• Experience working with payments, billing, or developer tools

We Offer

• Competitive compensation.

• Remote-first & open source culture. Work from anywhere in Europe (CET ±2 hours) and contribute to Polar in the open

• Generous workspace allowance. Budget for an initial home office setup or co-working membership

• High ownership. Help shape our product, architecture, open source libraries, SDKs, and developer experience from the ground up

• Twice-yearly team offsites. We gather in our teammates’ cities to experience their local life, brainstorm the future, and write pseudo-code for what delightful billing should look like

• Fast-moving and pragmatic environment. A small, senior team focused on momentum over perfection. We cut scope before we cut craft to keep shipping fast and iterating often

• Mission with leverage. Build tools that empower other builders; your work compounds through theirs

About the Team

How to Apply

Process

• Application Review - We’ll review your application and may reach out for a 15–30 minute video call with Birk (Founder)

• Team Interviews - You’ll meet a few team members for a deeper technical and cultural conversation

• Open Source Assignment - We’ll follow up with a GitHub issue scoped within Polar or one of our open source dependencies. You’ll collaborate with us asynchronously—from your first PR draft to final merge

• Final Call - A video chat to discuss your work, your feedback, and suggestions on how to improve the DX of working with Polar

• Reference Calls. We believe reference calls are great and help us confirm our impression and ramp up our understanding and abilities to ensure we hit the ground running productively.

• Offer 🎉