Jeremy Walker
Founder at Exercism
Birmingham, England, United Kingdom
Summary
🤩
RockstarJeremy Walker is a founder and seasoned full-stack software engineer with 15 years’ experience building mission-driven businesses and open-source projects from Birmingham, UK. As co-founder of Exercism and Kaido Group Ltd, he combines product leadership with hands-on backend and frontend development, notably restructuring the Exercism v3 tracks and improving C# and Ruby exercise ecosystems. He has deep experience shipping web platform features, improving test coverage, and evolving data models and schemas to support scalable learning experiences. Jeremy is an open-source enthusiast who tackles both developer tooling (husky, rubocop, prettier) and pedagogy-focused content, bridging engineering and education. Colleagues value his blend of entrepreneurial grit and meticulous code-level contributions that quietly raise project quality. He often surfaces practical improvements—like tidying documentation and build processes—that other leaders might overlook.
16 years of coding experience
Stackoverflow
2,440reputation
193kreached
52answers
5questions
Github Skills (23)
testing10
ruby10
tracks10
dotnet-core10
minitest10
activerecord10
csharp10
architecture9
git9
database-design9
architectures9
documentation8
jekyll8
database-administration7
macos6
Programming languages (86)
Github contributions (5)
exercism/website
May 2020 - Jan 2023
The codebase for Exercism's website.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:3154 reviews, 1449 commits, 4086 PRs in 2 years 9 months
Contributions summary:Jeremy primarily focused on back-end development, implementing features and fixing bugs within the Exercism website codebase. They worked on improving test coverage, particularly in the solution search and iteration creation commands. The user also made changes to data models and database schema, adding roles to users, and further enhancements to the data models for solution metrics.
codebaseexercismcommunity-contributions-paused
exercism/ruby
Aug 2017 - Sep 2021
Exercism exercises in Ruby.
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:77 reviews, 102 commits, 108 PRs in 4 years 2 months
Contributions summary:Jeremy primarily contributed to the exercism/ruby repository by adding and fixing Ruby exercises. They added a new "Basics" concept exercise and updated existing exercises, particularly focusing on improvements to the "Lasagna" exercise, introducing test cases and example solutions. Their contributions also included modifications to test files and the build process, showcasing experience with the project's testing framework and build configuration. Furthermore, they updated the concepts/enumeration/about.md, introduced rubocop and prettier hooks via husky and applied changes to address style violations.
rubyexercism-trackcommunity-contributions-paused
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