Stephen Day
Software Engineer at Baseten
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolStephen Day is a seasoned software engineer with 16 years of experience building robust, cloud-native infrastructure and distributed systems from San Francisco. He has driven core back-end work at Docker/Moby—helping define the OCI image spec, implement the Docker CLI, and design V2 registry APIs—and later applied that systems expertise at Cruise and Docker as a senior and principal engineer. His contributions show a deep focus on API design, protobuf-based RPCs, storage and registry internals, and CI-driven validation tooling, blending pragmatic refactors with protocol-level correctness. Comfortable both writing production Go and improving developer workflows, he often tackles thorny edge cases like deterministic HTTP resolution, Etags, and task-state management. Colleagues rely on him to turn ambiguous distributed-systems problems into maintainable, well-tested implementations that scale.
16 years of coding experience
19 years of employment as a software developer
BS Electrical Engineering, BS Electrical Engineering at University of WashingtonHigh School Diploma, High School Diploma at Sammamish Senior High School
English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (32)
api-rest10
filesystem10
container10
docker10
apidoc10
json-schema10
api-design10
restful-api10
storage10
user-authentication10
authentication10
containerization10
dockers10
cicd10
http-client10
Programming languages (14)
Github contributions (5)
distribution/distribution
Dec 2014 - Apr 2018
The toolkit to pack, ship, store, and deliver container content
Role in this project:
Back-end Developer
Back-end DeveloperContributions:13 releases, 881 commits, 621 PRs in 3 years 4 months
Contributions summary:Stephen implemented the initial V2 API router and the data structures for handling API errors within the "distribution/distribution" repository, which is a toolkit for container content. This included creating routes based on the gorilla/mux library, establishing a test suite to ensure correct variable extraction, and developing a new data structure and supporting functions to manage API error codes. The code demonstrates a strong understanding of API design and implementation for the core features of the registry.
containersshipdockerdelivercncf
opencontainers/image-spec
Apr 2016 - May 2022
OCI Image Format
Role in this project:Back-end Developer & Automation Engineer
Back-end Developer & Automation EngineerContributions:29 reviews, 131 commits, 147 PRs in 6 years 1 month
Contributions summary:Stephen primarily contributed to the image specification project by implementing and validating examples within the OCI image format. They developed a validation tool in Go to ensure examples in markdown documents matched JSON schemas. Further, the user worked on integrating the validation process into the project's build system, including the top-level Makefile and the CI/CD pipeline. The contributions also include refactoring and improvements to the schema definitions and specifications.
containersoci-imagedockerimage-formatoci
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.