Senior Backend Engineer - Platform Integrations (Monetization)

GitLab is the intelligent orchestration platform for DevSecOps. GitLab enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. More than 50 million registered users and more than 50% of the Fortune 100* trust GitLab to ship better, more secure software faster. The same principles built into our products are reflected in how our team works: we embrace AI as a core productivity multiplier, with all team members expected to incorporate AI into their daily workflows to drive efficiency, innovation, and impact. GitLab is where careers accelerate, innovation flourishes, and every voice is valued. Our high-performance culture is driven by our values and continuous knowledge exchange, enabling our team members to reach their full potential while collaborating with industry leaders to solve complex problems. Co-create the future with us as we build technology that transforms how the world develops software. * Fortune 500® is a registered trademark of Fortune Media IP Limited, used under license. Claim based on GitLab data. Fortune 100 refers to the top 20% ranked companies in the 2025 Fortune 500 list, published in June 2025. Fortune and Fortune Media IP Limited are not affiliated with, and do not endorse products or services of GitLab. An overview of this role The Observability, Monitoring, and Integrations team sits within GitLab's Monetization section. As a Senior Backend Engineer on the Monetization Platform Integrations team, you'll design, build, and maintain the integrations that connect CustomersDot and Monetization services to GitLab's enterprise applications, including Salesforce and Workato. You'll own robust application programming interface (API) contracts, protect data integrity across systems, and build resilient cross-platform workflows that underpin how customers buy, provision, and renew GitLab. Because these integrations move financial and subscription data between systems, you'll hold a high bar for reliability, observability, and careful rollout. You'll work closely with the monitoring and anomaly detection side of the team so that every integration is observable and failures are caught early. This role is opening at the Senior Backend Engineer level. Some examples of our projects: API contracts between Monetization services and enterprise applications such as Salesforce, Workato, and Zuora Event-driven integrations using webhooks and message-based patterns Resilient synchronization workflows with retries, idempotency, and clear error handling Reconciliation and data integrity checks across integrated financial and subscription systems What you’ll do Design, build, and maintain integrations between CustomersDot, Monetization services, and enterprise applications such as Salesforce, Workato, and Zuora. Define and evolve REST and GraphQL API contracts, including versioning and backward compatibility. Build observable, fault-tolerant integration workflows, and track error rates, retry success, and failed-workflow recovery to improve reliability. Ensure data integrity and consistency across integrated financial and subscription systems. Review and offer feedback on merge requests from other Monetization engineers. Collaborate with Product, Finance, IT, Sales, and Support to translate cross-system needs into reliable integrations. What you’ll bring Professional experience working in Ruby on Rails and PostgreSQL or similar relational databases in production environments. Experience integrating with third-party or enterprise APIs and designing REST and GraphQL contracts, including versioning and backward compatibility. Familiarity with event-driven patterns such as webhooks and message-based streaming. Experience with data integrity and governance concepts. Curiosity to understand how systems work as a whole and experience owning a project from concept to production, including proposal, discussion, execution, and…