Staff Frontend Engineer

Why Polar?

It's never been easier to build, ship and scale software.

But it's never been harder to monetize it.

We're obsessed over solving this to empower the future one-developer unicorns.

These unicorns will be rare but inevitable. Whether in 3, 5, or 10+ years, they also symbolize a broader shift already in motion and accelerating:

• Smaller & smaller teams with...

• Exponential revenue/employee growth

• Focusing fully on their core product and marketing. Delegating & automating everything else that's boilerplate – be it in their codebase or business operations.

Exceptional billing primitives, APIs, SDKs and abstractions are a crucial foundation, but not enough. They will need a full-fledged platform to oversee, manage and scale their business.

Turning their software into an international business in 6 lines of code.

Join our small, talented and engineering-led team across Europe to shape how future software businesses are built. We focus on shipping at high velocity to serve developers in unlocking their next stage with their business. Everything else is secondary.

Role & responsibilities

We're hiring a Staff Frontend Engineer to help shape our architecture, standards, and user experience across both our dashboard and SDKs. You’ll lead the design and implementation of open source libraries that enable developers to integrate, customize, and deploy seamless billing flows - from checkout to post-purchase to customer portals.

You’ll also build end-to-end features in our dashboard that help developers manage their billing, customers, and businesses. This is a high-impact role with significant autonomy and ownership - your work will help define the future of billing for developers.

• 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

What we're looking for

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

• Strong background of open source contributions and ideally some prominent packages of your own

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

• Deep experience with React and Next.js

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

• Constantly learning and trying out the latest and greatest frameworks, packages and tooling to refine your opinionated stance on best practices and stacks

• Excellent problem-solving skills and a clear communicator

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

How we hire

Our process is fully remote, and all communication happens via email, GitHub issues/PRs and/or video calls:

1. Application Review → Short intro call with Birk (Founder)

2. Assignment → Open source PR (Engineering) or case study

3. Review & interviews (2-3 video calls) to:

   • Meet future team

   • Review and discuss the assignment & feedback + technical questions

   • Meet Birk (Founder)

4. Reference Calls

5. Offer 🎉