About the role

We’re looking for a Senior Full-Stack Engineer to join our Growth Engineering team. This team drives some of Circle’s most critical initiatives: billing and plan infrastructure, trial and onboarding flows, A/B experimentation, and now — expanding into analytics and member experiences. With millions of members engaging across Circle communities, the work you do here will have an outsized impact. If you thrive in a data-driven environment, love refining experiences to feel seamless and intuitive, and want to help scale the systems that power growth at Circle, this role is for you.

What you’ll be doing

• Shipping often and with care, balancing speed with thoughtful, quality work.
• Owning end-to-end projects — from concept and development to rollout and measurable results.
• Partnering with engineers, designers and product leaders to craft member experiences that feel beautiful, simple, and premium.
• Scaling our billing infrastructure to support both self-service and sales-led use cases.
• Designing and implementing A/B tests to validate changes that boost user acquisition, retention, and expansion.
• Building world-class analytics that empower community owners with deep insights to understand and grow their communities.
• Implementing event instrumentation for each initiative to ensure impact can be tracked.

What you’ll need to be successful

• Strong alignment with our values, find our values on our career page if you haven’t read up on them yet.
• You are proficient in English (spoken, written, and reading) at a CEFR Level C2 / ILR Level 5.
• 6+ years experience working as a full-stack engineer on complex web applications.
• Strong proficiency in Ruby on Rails, MySQL/Postgresql, ReactJS, TypeScript, CSS/SCCS, TailwindCSS.
  • Solid experience in both frontend and backend development is expected, though deep expertise in both isn’t required. You should be able to independently build features end-to-end, and excelling more in one area than the other is perfectly fine.
• Proven track record of shipping customer-facing or consumer-facing experiences and solving hard problems.
• Comfortable in highly collaborative environments, working closely with stakeholders across engineering, product, design, and go-to-market teams.

Bonus points

• Experience working in a growth-oriented engineering role.
• Familiarity with billing tools or payments infrastructure (Stripe).
• Hands-on experience building or maintaining analytics systems, with a solid understanding of observability best practices.

$130,000 - $140,000 USD per year

The cash compensation range shown is a starting point. In addition to equity, benefits and perks, your cash compensation is subject to an annual review and increase on a once per year basis.