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Available for new projects

Fullstack Developer& AI Engineer

I create modern websites and mobile apps with a focus on code quality, performance optimization and UX/UI best practices. Additionally, I'm interested in artificial intelligence and machine learning development.

  • Next.js
  • React
  • JavaScript
  • Tailwind CSS
  • Flutter
  • Firebase
  • Supabase
  • Python
  • TensorFlow
  • Figma
  • Vercel
  • MongoDB

Selected work, from client websites to AI-powered apps.

Design1st place in the competitionUX/UI design

Radio Silesia

A fully functional app prototype for Radio Silesia that won first place in the competition. Live radio, shows, podcasts and the Szlaglista chart in one place.

  • “Play radio” button always within reach
  • Search across all content
  • Carousels of shows, podcasts and events
  • Figma
  • UX/UI
  • Mobile
Mobile App with AIDesign, AI model training and development

FoodAR

A Flutter app that detects mold on food. A custom YOLO model tells harmless discoloration apart from toxic mold with 91% accuracy and warns about health risks.

  • Real time mold detection with a YOLO model
  • 91% accuracy telling mold apart from discoloration
  • Warnings about health risks
  • Flutter
  • Python
  • YOLO AI
  • TensorFlow Lite
  • Roboflow
  • Firebase
  • Figma
WebsiteUX/UI design and development

Kombuczara

A website for an influencer promoting kombucha in Poland. Its heart is Kombuczkomapa, an interactive map of places that sell kombucha, searchable by city.

  • Kombuczkomapa with places that sell kombucha
  • Search by city
  • New places suggested via Instagram or a form
  • Zyro
  • JavaScript
  • API
  • UX/UI
  • Figma
WebsiteDesign and fullstack development

Mogo

A website for a fictional furniture company that started as a university project. I developed it further in Next.js and connected Supabase, so it now has sign in and user accounts.

  • Sign in and user accounts with Supabase
  • Projects, offer and contact sections
  • Large interior photos up front
  • Next.js
  • Tailwind CSS
  • Supabase
  • Auth
WebsiteFrontend development

LogiX

A website for a software house platform. A dark, minimal first screen with two clear buttons leads visitors straight to starting a project.

  • Dark, minimal first screen
  • Two clear calls to action: get started and learn more
  • About, Services and Contact sections
Figma DesignUX/UI design

Portfolio

My UI/UX work collected in a single Figma file. Finished projects and concepts for mobile apps and websites, split into two sections so you can go straight to what interests you.

  • Separate sections for mobile apps and websites
  • Finished projects shown next to concepts and early ideas
  • Designs prepared with the later build in mind

The tools I work with every day.

Frontend

  • Next.js
  • React
  • JavaScript
  • HTML5
  • CSS3
  • Tailwind CSS

Mobile & AI

  • Flutter
  • Python
  • TensorFlow
  • Firebase

Backend & deployment

  • Supabase
  • MongoDB
  • Git
  • Vercel

Design

  • Figma
  • No-Code

Feel free to reach out if you're looking for a developer, have a question, or just want to connect.

Location

Silesia, Poland

Response time: Usually within 24 hours

Jan Kotania | Fullstack Developer & AI Engineer