Principal Full-Stack Engineer, Billing

Squarespace is hiring a Principal Full-Stack Engineer, Billing to join our fully remote team in the United States. As a Principal Full-Stack Engineer, Billing, you'll design, build, and ship reliable software that scales to millions of users. This is a contract, work-from-home role open to candidates across the US (Remote — US (EST)). About the role You'll design, build, and ship reliable software that scales to millions of users, partnering with a friendly, distributed team across US time zones. We care about outcomes over hours and give you the autonomy, tools, and support to do your best work from home. What you'll do: • Improve performance, reliability, and developer experience • Collaborate with product and design on new initiatives • Develop, test, and maintain features across the stack • Review pull requests and mentor teammates • Write clean, well-tested, and documented code What we offer: • 401(k) retirement plan with company match • Flexible working hours across US time zones • Annual learning and professional development budget • Generous paid time off and company holidays • 100% remote, work-from-anywhere-in-the-US culture How we work We're remote-first and async-friendly. Expect clear documentation, regular feedback, supportive teammates, and real opportunities to grow your career. Squarespace is proud to be an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for everyone.

Minimum qualifications: • 7+ years of experience, including leading teams or projects • Solid understanding of data structures, APIs, and databases • Experience with version control and CI/CD • US work authorization • Proficiency in one or more modern languages (TypeScript, Go, Python, or Java) Nice to have: • A growth mindset and eagerness to keep learning • Familiarity with modern collaboration tools (Slack, Notion, Linear)