Summary
I bring over 15 years of experience in developing modern, globally competitive web solutions that deliver an exceptional user experience (UX).
I specialize in shaping complex systems into simple solutions that remain easy to change over time, ensuring long-term relevancy of the tech product. Software development is a passion, and I actively contribute to open-source projects.
I strive to create a supportive, empathetic work environment, while ensuring that decisions remain objective and grounded.
Tech Stack
I view programming languages and tech stacks as secondary to core design principles, the ability to write clear, easy-to-change code, problem-solving skills and pragmatic thinking. Delivering value to users is my ultimate focus.
I’ve focused on functional programming, Elixir and its ecosystem for the past few years, as well as frontend development with JavaScript/TypeScript frameworks. I also have extensive experience in object-oriented programming and its patterns. I’m open to any tech stack, as languages and frameworks can be learned.
My Philosophy
Here are a few principles that resonate with me and steer my approach to work:
- Focus on the user, not the product.
- Design for change, ensure adaptability.
- Simplify where possible, minimize complexity.
- Code for humans, not machines.
Experience
Full-Stack Software Developer
Subtile
Mar 2023 – Feb 2024
Developed a finance tracking tool for NGOs from scratch, covering backend, frontend development, UI/UX design, and deployment.
Elixir/SolidJS/PostgreSQL/GraphQL/HTML/CSS
Full-Stack Software Developer
MoneyTransfer
Mar 2022 – Mar 2023
Evaluated application complexity and new developer onboarding challenges. Recommended improvements and reported on technical debt's business impact to the CTO and founders. Provided coaching on design principles and best practices.
Elixir/PostgreSQL/Rest
Full-Stack Software Developer
CitizenLab
Aug 2020 – Nov 2021
Developed a real-time application to increase citizen involvement in government projects, enabling discussions, voting, and idea sharing via video conferencing and interactive forms.
Elixir/LiveView/PostgreSQL/HTML/CSS
Full-Stack Software Developer
Multipharma
Apr 2017 – Mar 2019
- Developed a React-based stock management app from scratch to efficiently track and manage daily medication packets for resthome clients.
- Building various internal-use web apps to optimize pharmacists' internal workflows and processes.
React/Rest/HTML/CSS
Full-Stack Software Developer
ING
Jan 2017 – Apr 2017
Migrating ING's website to a modern, responsive design for improved user experience and accessibility.
JavaScript/PHP/HTML/CSS
Full-Stack Software Developer
Multipharma
Dec 2015 – Jan 2017
- Refactoring critical legacy, buggy applications for the delivery of daily medication packets to rest home patients, ensuring each packet's content and timing are accurate.
- Building various internal-use web apps to optimize pharmacists' internal workflows and processes.
PHP/jQuery/Oracle DB/HTML/CSS
Full-Stack Software Developer
Freelancing
Jan 2008 – Dec 2015
- Building presentation websites for clients in various sectors.
- Developing an application for doctors, enabling online appointment bookings and automated email and SMS reminders for patients.
PHP/jQuery/MySQL/HTML/CSS
Full-Stack Software Developer
Fortis
Sep 2006 – Jan 2008
Develop an internal Java web application for booking seats on a private airplane shuttle between Brussels and Luxembourg, featuring seat selection and flight scheduling.
Java/Struts/JavaScript/Oracle DB/HTML/CSS
Full-Stack Software Developer
Ebuco
Mar 2006 – Jun 2006
Create an app for remote management of digital displays in businesses, featuring easy upload and scheduling of ads and media and real-time updates.
Java/Swing/MySQL
Education
Computer science
Institut Paul Lambin
Oct 2003 – Jun 2006
About me
Name
Mathieu Decaffmeyer
Age
41 y/o
Languages
English, French, Dutch
Personal traits
Analytical, Creative, Pragmatic, Self-reliant, Can-do attitude, Takes ownership, Supportive, Multicultural, Compassionate
Contact me
Design is not just what it looks like and feels like. Design is how it works.
Mathieu Decaffmeyer
End-to-End Software Consultant