About me
A wild roseish kind of developer
I’m Gideon, a frontend developer and data enthusiast based in Utrecht who didn’t grow in a straight line. I studied econometrics, built housing-price models as a data scientist, discovered the joy of building interfaces, led teams on a busy supermarket floor, and these days I coach CrossFit classes too. Not quite a specialist, not trying to be one.
Curious about everything
New things and change give me energy: they motivate me to explore and learn. That drive took me from statistics to Angular, React and Vue. From the Netherlands to Lisbon to Brazil and back. It’s also why I happily pick up whatever a project needs: data, design, the server side or the details nobody else wants to own.
Strong roots, soft petals
I work hard and see things through, like rebuilding a complete HR platform as the only frontend developer. But I’d rather bring connection and good energy than force. To me, hard work and softness were never opposites.
Better in a bunch
Leading teams of 10–15 and coaching group classes taught me that morale is part of the work. I listen, build trust, lead by example and want the people around me to feel valued for who they are, not for who they’re supposed to be.
Experience
Where I’ve grown
Data, code, people and barbells: every place I’ve worked added something new to the mix.
Jun 2024 — Present
Medior Frontend Developer
TalentExcellence
As the only frontend developer at this Dutch talent-management software company, I led the complete rewrite of its HR web app from Vue 2 / Nuxt 2 to Vue 3 / Nuxt 4: the new architecture, modern best practices, and new features along the way. The result is faster and far easier to maintain.
Oct 2025 — Present
CrossFit Coach
CrossFit Seyst
Level 1 certified coach, working towards Level 2, coaching group classes for athletes of every level. I focus on building community and earning the trust that makes people open to coaching. I also designed and built the gym’s website.
Apr 2022 — May 2024
Medior Frontend Developer
Desty
Lead developer on the rebuild of a travel e-commerce platform in React and Next.js, working closely with an experienced UX/UI designer. All of it fully remote, from Portugal and Brazil.
2021 — Mar 2022
Angular Developer
Calcasa · Delft
Trained by a freelancer with 15+ years of experience, I discovered the joy of creating and switched careers. Within six months I was in charge of maintaining and developing our new single-page web app.
Nov 2019 — Mar 2022
Data Scientist
Calcasa · Delft
Built automated data pipelines in Python and SQL, and a predictive model for housing prices in the Dutch rental market.
2015 — Sep 2019
Team Leader
Albert Heijn · Amsterdam
Led teams of 10–15 people in a high-pressure role, next to my studies. It taught me the value of morale, teamwork and solving problems on the go.
2014 — 2019
BSc & MSc Econometrics
University of Amsterdam · Amsterdam
A bachelor’s in econometrics and a master’s in Data Science & Business Analytics: the structured, analytical roots under everything I build.
My projects
Things I’ve made
Chalkup
2026Paste a CrossFit workout and walk into class knowing what’s coming. Chalkup breaks it into parts, movements and the intended stimulus, then builds the class around it: warm-up, skill practice, timing, and videos and articles to read before.
Private beta, password-protected for now. Get in touch if you want to see it in action.
Expat Academy Europe
2025A bilingual website for an academy that helps NGOs and companies select, train and guide professionals for international deployment, with courses and assessments the client manages themselves in a CMS.
Built from scratch by hand, no AI. AI only helped with recent updates.
CrossFit Seyst
2022The website for the CrossFit gym where I coach: classes, memberships and a contact form, with content managed in Contentful.
Built from scratch by hand, no AI. AI only helped with recent updates.