About the role

Full Stack Engineer joining Circle’s Payments team to develop and enhance billing and invoicing systems. Collaborate on payment solutions while working remotely from anywhere in the world.

Responsibilities

Work autonomously across our Ruby on Rails backend and React front-end to ship high-quality features quickly and safely.
Lead complex projects end-to-end, driving architectural and product decisions.
Design and scale our subscription billing and invoicing platform, including multiple pricing structures, plan changes, proration, invoicing, and full subscription lifecycle events.
Anticipate and design for common billing edge cases such as partial periods, legacy pricing, tax/VAT integration, and failed payments.
Build and evolve monetization features like paywalls, upsells, affiliate tools, and subscription settings.
Integrate and scale payment solutions (e.g. Stripe, PayPal, in-app payments) to support global audiences, multiple currencies, and diverse business models.
Optimize checkout and paywall experiences for reliability, conversion, and UX.
Collaborate with leadership, product, and design from early exploration through launch.
Continuously improve performance, developer experience, and code quality.
Balance iteration speed with technical and UX excellence, shipping behind feature flags when needed.

Strong alignment with our values (see our careers page).
Proficiency in English (spoken, written, and reading) at CEFR Level C2 / ILR Level 5.
5+ years of experience building and maintaining complex full-stack web applications.
Advanced proficiency in Ruby on Rails, MySQL/PostgreSQL, React, TypeScript, CSS/SCSS, and TailwindCSS.
Direct experience building, scaling, or operating a subscription billing and invoicing system in production.
Hands-on experience integrating and maintaining payments in live environments.
Strong product mindset with a focus on user outcomes.
Senior-level ownership mindset with the ability to lead engineering-heavy, high-impact initiatives with significant autonomy.
Comfort operating in a fast-paced, remote-first environment.
Experience working on a fully distributed team.

Fully remote: work from anywhere in the world!
Autonomy and trust to do your job: we care about outcomes over everything else.
Paid time away: all employees are given 35 days of PTO annually. We also offer a paid sabbatical after 5 years.
Generous U.S. benchmarked compensation and startup equity no matter where you are in the world.*
Awesome medical coverage with 100% coverage for you and your family, or medical reimbursement options where applicable!*
Parental leave for parents expanding their family, or just starting one.
Home office stipend to help you get up and running.
Learning & development stipend to help you level up your professional skills.
Annual bonus potential for roles that don't already receive variable income or commission.
Company retreats: Twice a year, the Circle team gets together for a fully paid company retreat in incredible places around the world! We’ve had past retreats in Colombia, Portugal, and Mexico, with more planned on the horizon.