Our Team

Exercism is built by people from all over the world 🙌

Over 6,000 contributors
·
231 countries
·
287 GitHub repositories

A world map containing avatars of Exercism contributors

Thousands of people have supported our vision and helped build Exercism.

Exercism relies on leadership team and staff, a wider team of approximately one hundred maintainers and key contributors, and small contributions from thousands of individuals. Beyond these contributions to our product, tens of thousands of members of our community have contributed by giving feedback and help to others.

Leadership Team

Our leadership team manage the strategic and organisational sides of Exercism. They are responsible for fulfilling our mission statement and maintaining our values.

An image of Katrina

Katrina Owen

Co-founder & Director

Katrina is the original creator of Exercism. She is co-author of 99 Bottles of OOP. Polyglot developer and Ruby Hero award winner, with a degree in Molecular Biology. Cares deeply about open-source and contributes to several projects outside of Exercism.

An image of Jeremy Walker

Jeremy Walker

Co-founder & CEO

Jeremy is an entrepreneur and software developer, who's passionate about equality and opportunity. He has co-founded various organisations, including Meducation, Wondr Medical, and Kaido, and holds a patent for AI used in heart surgery.

Staff

Our staff manage our website, the CLI and the operational side of Exercism, ensuring that we provide a safe and reliable experience for everyone using Exercism.

An image of Erik Schierboom

Erik Schierboom

Head of Open Source

Erik works full-time for Exercism, building the software and infrastructure that powers the open-source elements of the platform, and ensuring each track a joy to work with. He was a top Exercism volunteer before joining full-time. He is a polyglot developer who loves to learn new languages.

An image of Taiyab Raja

Taiyab Raja

UX/UI Designer

Taiyab is a seasoned UI/UX designer responsible for designing Exercism v3. If you think Exercism looks and feels awesome, he’s the man to thank. Taiyab enjoys all things startups, design and entrepreneurship.

An image of Loretta Murray

Loretta Murray

Head of Fundraising and Partnerships

Loretta is motivated by the transformational power of fundraising, and has a track record of successful strategic and operational delivery across complex organisations including Cancer Research UK, UNICEF, NSPCC. and Abertay University. She is a qualified business coach with a passion for developing fundraisers' skills.

An image of Jonathan Middleton

Jonathan Middleton

Community Manager

Jonathan loves to help others grow and find their unique space in the world. With an entrepreneurial streak and multi-cultural background, he loves to listen and build deep and lasting community. Away from work he spends most of his time being father to his adorable but chaotic daughter.

An image of Aron Demeter

Áron Demeter

Front-end Developer

Áron is a self-taught developer who gets excited about discovering interrelations between things. He has a Master's degree in classical piano performance. In his freetime he enjoys spending time with his family, learning new languages on Exercism or listening to an opera.

Alumni

People who have previously worked full-time at Exercism and since moved onto new adventures. Their legacies are gratefully remembered!

An image of Nicole Chalmers

Nicole Chalmers

Nicole is the Head of Product at Kaido. She spent two years as Head of Product for Exercism, guiding us from v1 to v2, and helping set the principles and ideas that still drive Exercism today.

An image of Charles Care

Charles Care

Charles was part of the team that built Exercism v2, working specifically on the server-side code and infrastructure. He helped build out the first version of our automated mentoring platform, and Github integration.

An image of Karlo Soriano

Karlo Soriano

Karlo worked on the website part of Exercism. He created most of the website's interactive frontend for v3, and contributed to much of the Rails backend platform.

Track Maintainers

Our maintainers are the lynchpins of the language tracks and exercises on Exercism. They create and organise exercises for each of our 50 languages and help guide us to ensure Exercism teaches students in the most idiomatic way possible.

See all Exercism maintainers

Mentors

Our mentors are the human element behind Exercism, providing empathetic feedback on learners' solutions. They are the magic that makes Exercism come alive.

See all Exercism mentors

Open source contributors

Exercism could not be the success it is without the contributors of over 2,000 volunteers, who add value in numerous ways, from writing tooling to creating the exercises you solve.

See all contributors