Mathieu Decaffmeyer
Full-stack & Mobile Developer (React Native, PHP, VueJS)
Brussels, Belgium
Summary
👤
Senior🎓
Top SchoolMathieu Decaffmeyer is a pragmatic full-stack and mobile developer based in Brussels with 11 years of professional experience and a 15-year hands-on coding background, focused on turning product ideas into reliable, scalable SaaS. He builds end-to-end solutions across React Native, Vue, PHP and Elixir, recently shipping pest-control field and NGO finance tools while leading UI/UX, backend design and deployment. Comfortable bridging product and engineering, he advises on technical debt and onboarding, and coaches teams on design principles to improve long-term maintainability. An active open-source contributor, he has improved core Elixir/Ecto code and docs—demonstrating attention to both functionality and developer ergonomics. He emphasizes outcomes over specific languages and leverages AI-assisted workflows to speed high-quality delivery.
11 years of coding experience
13 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at IPL
Github Skills (5)
ecto10
elixir10
documentation10
database-design9
testing8
Programming languages (9)
Github contributions (5)
elixir-ecto/ecto
Oct 2019 - Sep 2021
A toolkit for data mapping and language integrated query.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 reviews, 19 commits, 18 PRs in 2 years
Contributions summary:Mathieu primarily contributed to the Ecto project by fixing typos, updating documentation, and enhancing the `unsafe_validate_unique` function. They addressed indentation issues, corrected error messages, and updated examples for the `Repo.one/2` function. Their changes involved modifications to core Ecto files like `changeset.ex`, `query.ex`, and `repo.ex`, demonstrating a focus on improving the framework's functionality and documentation.
querysqlserverintegratedlanguage-integrated-querysql
gobline/application
Jan 2015 - Jun 2022
Contributions:40 pushes, 1 branch, 40 tags in 7 years 5 months
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