Stefan VanBuren

Experience

1. CoreWeave

   May 2026–Present
   Senior Software Engineer
   • Something new.

2. Buf Technologies

   July 2022–May 2026
   Software Engineer
   • Built and maintained the Buf Schema Registry, especially Generated SDKs and Policy Enforcement.
   • Worked on integrating Bufstream with the Buf Schema Registry, enabling its Semantic Validation features.
     • Built out the OSS Kafka Serdes for Go and Java
   • Maintainer of connect-python, part of the ConnectRPC suite of RPC libraries and a CNCF project.
   • Maintained protovalidate-python.
   • Contributed to the buf CLI toolchain, largely in the LSP area.
     • Integrated the LSP into our editor integrations: VS Code Buf and IntelliJ Buf
   • Maintained our auto-updating modules and plugins repositories, syncing new updates to the BSR.
   • Maintained a variety of documentation projects, public and private, backing buf.build/docs, protovalidate.com, celbyexample.com, protobuf.com, connectrpc.com, and the protovalidate playground.

3. Blues Wireless

   January 2020–July 2022
   Staff Software Engineer
   • Enhanced and maintained the Notehub web application.
   • Lead developer of the Notehub public API.

4. Catch

   November 2017–November 2019
   Senior Software Engineer
   • Led the design and implementation of the backend GraphQL API server.
   • Primary developer of the user authentication, platform notification, and financial data aggregation services.

Skills

Languages

Go, Python, SQL, HTML, CSS, Clojure, ClojureScript, TypeScript, JavaScript, Rust, C, C++, Java

Tools

Git, GitHub, Postgres, SQLite, Unix command line tools, AWS, GCP