Desktop & business software
I design and code full software — logic, interface, database, the whole package.
- Java & C# applications
- Python automation & scripts
- C for performance-critical code
WELCOME TO MY PORTFOLIO
ROMÉO KOTHAN
I build software, mobile apps & web platforms — databases, cybersecurity, SEO, 3D. Full developer, not just a front page.
ProfileSoftware · Mobile · Web Developer
Based inFrance · Remote OK
EdgeCybersecurity · SEO · 3D
StatusOpen to opportunities
About me
Developer from France — built to ship, not to talk.
Roméo KOTHAN — Developer 🇫🇷
I'm from France. I code software, mobile apps, and web platforms — with databases and back-end systems when the project demands it. I also fix IT problems, I train in cybersecurity on Root-Me, and I've spent years mastering SEO on my own 🔍
DeveloperSoftware · Mobile · Web · Databases · IT support
SecurityCybersecurity training + CTF challenges on Root-Me 🔐
Self-taughtSEO for years, 3D modeling & WebGL — I learn fast and I deliver
Beyond school, I'm self-taught: SEO, 3D modeling, Three.js — this portfolio is built with 3D models I integrated myself. I don't wait for a course to start building 🎨
What I build for you 🚀
Software, mobile, web, security, SEO — I cover the full spectrum. Pick what your company needs.
Mobile applications
I build mobile apps that run on phones — useful screens, clean UX, solid code behind them.
- Cross-platform mobile development
- Connected to APIs & databases
- Apps built to be maintained
Websites & web platforms
From a simple company page to a complex platform — with databases and custom systems when you need them.
- Showcase sites & e-commerce
- Custom back-end & MySQL databases
- React, Next.js, PHP — architecture that scales
IT troubleshooting
I diagnose and fix IT problems — hardware, software, networks. I've done it in a real company during my internship.
- User support & incident resolution
- Workstation setup & maintenance
- Internal web & tooling tasks
Cybersecurity
Trained in security during my BTS — and I push myself on Root-Me CTF challenges to keep my skills sharp.
- Network & system security basics
- CTF challenges on Root-Me
- Secure coding mindset
SEO & visibility
Years of self-study on SEO — keywords, backlinks, page structure — so your site actually gets found.
- Keyword research & on-page SEO
- Backlink strategy
- Real experience on my own projects
3D & interactive experiences
Self-taught in 3D — I bring interfaces to life with models, animation, and WebGL. This portfolio is the proof.
- Three.js & interactive 3D
- 3D modeling (self-taught)
- GSAP animations & motion design
Quick answers 💬
For recruiters and tech leads — straight to the point.
Click a question to open it.
I deliver real solutions — not just code on a screen. Here's what I bring to the table:
- A professional website or web platform — simple showcase or complex system with database
- Desktop software to manage your business (inventory, clients, internal tools)
- A mobile app your team or customers can use every day
- SEO so people actually find you on Google
- IT support — I fix problems, I don't just build new things
- Security-aware development — trained in cybersecurity, practiced on CTF challenges
No. Web is a big part of what I do, but I also build desktop software (Java, C#, C), mobile apps, Python automations, and I handle IT troubleshooting. I'm a complete developer — front, back, software, mobile.
Yes. I studied it during my BTS SIO — networks, vulnerabilities, secure practices. On top of that, I train on Root-Me and other CTF (Capture The Flag) platforms to solve real security challenges. Security is part of how I think when I code.
Absolutely. I've studied SEO for years — keyword strategy, page optimization, backlinks. I know how to structure a site so search engines understand it and rank it. I apply this on every project I care about.
Two professional internships (IT support at the city of Quimper + web development), a full track of school projects shipped end-to-end, and years of self-driven learning — SEO, 3D, cybersecurity challenges on Root-Me. I don't wait for a classroom to learn.
Both. Based in France, available on-site, remote, or hybrid.
Web: React, Next.js, TypeScript, PHP, Node.js, MySQL. Software: Java, C#, C, Python. Mobile: cross-platform app development. 3D: Three.js, Blender (self-taught). Security: network basics, CTF practice on Root-Me.
Yes. I've built apps with real database architecture, custom PHP/Java back-ends, data layers in school projects like GSB Frais, and this portfolio's 3D + scroll-driven system. I think about structure before I write the first line.
Self-taught. I started learning 3D modeling and WebGL on my own, then integrated Three.js into this portfolio — GLB models, scroll animations, the works. I like pushing interfaces beyond flat pages.
Tech stack
Languages and tools I use to build software, mobile, web, and secure systems.
Cybersecurity — BTS training + active CTF practice on Root-Me
SEO — Years of self-study: keywords, backlinks, ranking strategy
Software & mobile
Desktop apps, mobile apps, scripts — full programs, not just pages
Java
C#
C
Python
React Native
Web & platforms
Front-end, back-end, databases — simple sites to complex systems
HTML
CSS
JavaScript
TypeScript
React
Next.js
PHP
Node.js
Three.js
Data, security & tools
Databases, version control, cybersecurity foundations
MySQL
Git
Linux
My track record 🗺️
Education, internships, cybersecurity — the path that built my skills.
Education
High School Diploma in Technology
Baccalauréat STI2D
📍 Lycée Colbert, Lorient
Robotics clubs, Arduino, first websites 🤖 — I chose tech because building things is what I do best.
Education
Two-year Technical Degree in IT
BTS SIO — SLAM option
📍 Lycée Chaptal, Quimper
Full-stack training: web development, Java & C# software, MySQL databases, networks — and cybersecurity 🔐. Real projects delivered, not just theory.
Education
Cybersecurity challenges (CTF)
Root-Me & capture-the-flag
📍 Online — France
I train on Root-Me and CTF platforms — cracking challenges, exploiting vulnerabilities, thinking like an attacker to code like a defender. Security isn't a checkbox for me, it's a skill I actively maintain.
Experience
IT Internship
City of Quimper
📍 Quimper, France
Real IT work: troubleshooting, fixing workstations, solving software issues for staff, internal web tasks. I proved I can handle pressure in a professional environment.
Experience
Web Development Internship
Business website rebuild
📍 Quimper, France
Full website rebuild on WordPress — design, structure, content. Delivered a site the business could run themselves ✨
Education
Bachelor's Degree in IT
Licence CDA
📍 Université de Bretagne Occidentale, Brest
Deep engineering: C programming, VHDL processor simulations, Java software architecture, CodeIgniter web frameworks, CPU optimization ⚙️. The level where code meets hardware.
Projects I've built
Software, web, databases — real projects with screenshots and clear outcomes.
Personal project
FeaturedPersonal project3D Portfolio
Full interactive portfolio — 3D models, scroll animations, responsive design, SEO built in.
What I did: End-to-end: design, React/Next.js code, Three.js integration, deployment
Software projectGSB Frais
Java desktop software with MySQL database — business data management from UI to storage.
What I did: Full build: application logic, database schema, user interface
Web platformLaFleur
E-commerce platform with custom PHP back-end and MySQL — products, cart, orders.
What I did: Back-end architecture, database, front-end integration
Web platformLaCritica
Full WordPress blog platform — films & series, structured content, custom design.
What I did: CMS setup, theme structure, content architecture
WebsiteKayak'Mor
Brand showcase website — responsive pages, clean design, ready for the web.
What I did: Design and front-end development
Let's work together
Need a developer who ships software, mobile, web, and more? Get in touch.