How this site is built
From a blank page to a live site: what I rejected, what I chose and why. Astro, three languages, a local dashboard, SEO and motion written in code.
Software Engineer
I design and build software: web and mobile applications, APIs and backend services, from the first idea to production.
I’m Yohann, a software engineer. For five years I’ve been designing and building web, mobile and backend applications, from the interface down to the database.
A computer engineering graduate, I work mostly in TypeScript with React, Next.js, NestJS and Node.js. For data I use PostgreSQL and Supabase; for mobile, Expo; for interfaces, Tailwind CSS.
I ship complete products, from the data model to the screen, with care for quality, performance and security.
Bonn, GermanyBased in
4 applications builtProjects5 yearsof experience
Fast, accessible interfaces with React, Next.js, Astro and Tailwind CSS.
Cross-platform mobile apps with Expo, backed by solid APIs.
APIs with Node.js, NestJS and Laravel, data with PostgreSQL and Supabase.
I build secure software: authentication, input validation, secrets management. My goal: train in cybersecurity to go further.
A selection of products built end to end.

Mobile app · Gifts and delivery
Mobile app, API and back office for a platform that delivers gifts and services in Cameroon: flower and money bouquets, surprise baskets, home beauty care and express delivery.

Web application · Sports management
Application to run the championships of the Ligue de Basketball du Centre: generated fixtures, entered scores, FIBA standings calculated automatically, and a public site to read them.

Ordering platform · Fast food
Unofficial proposal for an ordering platform for a Cameroonian chicken chain: the real menu, restaurant choice on a map, the order sent over WhatsApp and a restaurant back office to handle it.

Web platform · Career guidance
Web platform for career guidance assisted by AI: a test analysed by AI suggests careers and training, with a forum, chat with advisers and an admin area.
From the first conversation to delivery, five clear steps.
We frame the need, the users and the constraints with the client.
Specification, UI/UX mockups and technical architecture.
Short iterations with regular demos.
Automated tests, security review and performance checks.
Release to production, documentation and maintenance.
Five years shipping web, mobile and backend products.
Apr – Jun 2025
Minguili
Expo / React Native mobile app, NestJS API and React back office for a platform delivering gifts and services in Cameroon, published on Google Play.
April – June 2023
TW Micronics · Yaoundé
Two-month academic internship as a junior mobile developer, at the end of the second year at the IUT Fotso Victor in Bandjoun, with a technology and AI company founded in 1993.
2023 – 2024
Education · IUT Fotso Victor de Bandjoun · Bandjoun
University of Dschang. Final-year project: SkillMatch AI, a career guidance platform assisted by AI.
What I build, what I learn, what I test.
All postsFrom a blank page to a live site: what I rejected, what I chose and why. Astro, three languages, a local dashboard, SEO and motion written in code.
Where I stand on application security: what I already apply in my projects, what I want to learn next and how I go about it.
I am open to remote roles. Write to me, or pick a time for a call and I will confirm by email.
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