John Vanenk
Senior Principal Engineer at Fastly
Tacoma, Washington, United States
Summary
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Rockstar🎓
Top SchoolJohn Vanenk is a Senior Principal Engineer with 17 years of experience building systems software, network applications, and distributed systems from Tacoma, Washington. He has progressed through hands-on engineering to leadership roles at Fastly, blending technical direction with people management and delivery oversight. A pragmatic contributor to well-known open-source projects like Unity, Ceedling, and Mozilla's cbindgen, he focuses on test automation, build reliability, and cross-language compatibility. His work shows a strong emphasis on improving CI, test coverage, and build toolchains for C and Rust ecosystems—skills informed by early embedded systems experience and a BS in Computer Science from Calvin College. Notably, he moves comfortably between low-level C/Rust tooling and high-level operational concerns, making him effective at preventing regressions and driving long-lived infrastructure quality.
16 years of coding experience
12 years of employment as a software developer
BS, Computer Science, BS, Computer Science at Calvin College
Github Skills (18)
unit-testing10
c-language10
testing10
c1110
c1710
build-automation10
rust10
cprogramming-language10
unit-test10
test-framework9
rspec9
compiler-flags9
rake9
github-ci7
githubaction-workflow7
Programming languages (6)
Github contributions (5)
ThrowTheSwitch/Ceedling
Jan 2012 - Sep 2013
Unit testing and build system for C projects
Role in this project:
QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:93 commits in 1 year 7 months
Contributions summary:John primarily focused on enhancing the testing infrastructure of the Ceedling project, a build system for C projects. Their contributions involved adding and modifying tests, including stubbed specs and TDD-driven functions. They also introduced a Continuous Integration (CI) task and made adjustments to support gem deployment and example project integration, demonstrating a focus on improving test coverage and automation.
behavior-driven-developmentraketestingrubysystem-test
ThrowTheSwitch/Unity
Jun 2012 - Mar 2013
Simple Unit Testing for C
Role in this project:QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:17 commits in 9 months
Contributions summary:John's contributions center on enhancing the testing framework for the Unity project. They introduced new tests to ensure the integrity of the Unity struct and its size, crucial for preventing future compatibility issues. Several commits are focused on refactoring and improving the clarity of the test suite. The user consistently demonstrates a focus on creating robust and maintainable unit tests.
testingunitdoctesttddunit-testing
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