Sr. Backend Engineer - Payment

## About the Role Bitly is looking for a Sr. Back End Engineer to develop, improve and expand the services that power our payments infrastructure across all Bitly products. You'll join the Payments team within the Growth part of the organization, where we own the end to end subscription revenue pipeline. Your work will be highly visible across Engineering, Product and Design, and GTM teams as we continue to scale globally. You will work closely with the engineering and product teams aligned within Growth. Our teams work primarily in Go, TypeScript and React. You will report to and collaborate with the Engineering Manager assigned to your team. ## Responsibilities - Design, implement, and own high‑throughput Go services that manage subscription lifecycle, payment orchestration, and financial data pipelines. - Integrate and maintain connections with external billing platforms, ensuring accuracy, resilience, and regulatory compliance. - Continuously collaborate with a diverse organization of value-driven individuals to understand the goals, needs, and priorities of our users. - Turn your understanding of our systems into thoughtful, well-tested and scalable solutions easily managed by your fellow engineers. - Advance our payment platform by contributing to modernization initiatives and shaping the technical roadmap for payments. - Own reliability & performance of payment services, employing automated testing, monitoring, and alerting to meet stringent SLAs. - Provide mentorship and support to Mid-level Engineers on your team to help them grow in technical competence, ensure code quality for owned services, and remove blockers for the team. ## Requirements - You have extensive experience in back‑end engineering and designing and scaling distributed systems in production. - You have expert-level proficiency in Golang, with a strong track record of shipping high-throughput APIs and writing understandable, testable, and efficient code. - You have hands-on experience integrating and operating Zuora (REST A