Patrick Costello is an engineering leader with 14 years of experience designing and scaling cloud-native databases, currently leading the Google Cloud Firestore engineering organization. He oversees a real-time document database that serves over 600,000 active developers and powers 1.5 billion end-users, balancing simplicity, speed, and enterprise-grade reliability at petabyte scale. Patrick blends deep customer empathy with a focus on multiplying individual engineer impact through transparent, rapid decision-making and leadership development. His hands-on background includes substantive contributions to Google Cloud client libraries (e.g., Java Datastore proto/client work and CI integration), reflecting both systems-level craftsmanship and production-grade tooling. Based in Redwood City with an MS and BS from Stanford, he is passionate about growing well-rounded engineers and cultivating the next generation of technical leaders.
14 years of coding experience
14 years of employment as a software developer
Master of Science (M.S.) Computer Science, Master of Science (M.S.) Computer Science at Stanford University
Low-level, Protobuf-based Java and Python client libraries for Cloud Datastore. Check out google-cloud-java and google-cloud-python first!
Role in this project:
Back-end Developer
Contributions:2 releases, 23 commits, 26 PRs in 6 months
Contributions summary:Patrick primarily focused on updating and maintaining the Java client library for Google Cloud Datastore, specifically migrating to version v1beta3. They also made changes related to proto library versioning and remote procedure call implementation. Further contributions included adding a helper for ancestor filters, updating version numbers, and integrating Travis CI for continuous integration.
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Patrick Costello - Engineering Lead, Google Cloud Firestore