Senior Software Developer (JCP Core Foundation Licensing and Quotation)

<p>If you want to build and own the systems that decide what JetBrains customers are entitled to use and bill them accurately for it, this is for you. You will focus on designing backend services, keeping complex commercial flows correct, and tackling hard distributed systems challenges on the critical path of every paid request.</p> <p><strong>About JetBrains</strong></p> <p>We create intelligent software development tools for developers and teams. More than 15 million users, over 300,000 companies, and 88 of the Fortune Global Top 100 rely on our products to solve real, complex problems. Our mission is simple: make development teams more productive and AI adoptable at scale.</p> <p><strong>What you’ll do</strong></p> <p>At JetBrains, the Cloud Platform department builds the underlying infrastructure that powers authentication, paid capabilities, usage metering, and accounting. Within this department, the Licensing &amp; Billing team sits right at the center of our commercial model, turning what a customer buys into what they are actually allowed to use, and accounting for that consumption accurately enough to bill on.</p> <p>The complexity of our entitlement, quota, and metering systems continues to grow. In this role, you will own the correctness and evolution of these backend services, take full ownership of end-to-end data flows, tackle distributed consistency across unreliable upstream systems, and ensure revenue-affecting data migrations happen cleanly without taking services offline.</p> <p><strong>Day to day, you will:</strong></p> <ul> <li>Design, build, and operate backend services that decide what a customer is entitled to and what their usage costs.</li> <li>Own flows end to end, from ingesting licensing and purchase data from upstream systems to enforcing quotas and recording consumption.</li> <li>Evolve our domain model to handle new commercial structures, combining seat-based plans and usage-based models.</li> <li>Design integrations with external systems, ensuring correctness through idempotency, ordering, reconciliation, and eventual consistency.</li> <li>Plan and execute live data migrations using feature flags, dual writes, backfills, and verification at every stage.</li> <li>Build observability into our systems by defining invariants, metrics, and alerts to catch silent divergence before customers do.</li> <li>Design internal APIs with explicit focus on versioning, backward compatibility, and developer experience for other JetBrains teams.</li> <li>Improve system performance and reliability under continuous production load while decommissioning legacy subsystems.</li> <li>Write integration tests against real dependencies and maintain reliable test infrastructure.</li> <li>Investigate pr