- Portfolio & CV
- Bielsko-Biała, Poland
- Frontend & full-stack · B2B
Patryk
Łaciak
Full-stack DeveloperReact, TypeScript & React Native3D Visualization
I build web and mobile applications, interactive 3D viewers and tools for exploring complex data.
In short
2018 → 2026- Focus
- React
- TypeScript
- React Native
- Also
- 3D visualization · backend features & integrations
- Timeline
2018 · Web development · technical school
2022 · Selleo · Full-stack Developer
- Looking for
- Frontend or full-stack roles, frontend-leaning · B2B
- Based in
- Bielsko-Biała, Poland
- Languages
- Polish (native) · English (B2)
0/74modules
fig. 01 — my stack as a tower — built as you scroll
01
Selected work
Client work and products I build myself. Commercial projects are presented anonymously.
View all work8 projects01 · Commercial · anonymised12.2024 — now
Engineering Applications — 3D Analysis
Browser-based tools for interactive 3D visualization and engineering data analysis.
Commercial project · ongoing development
- React
- TypeScript
- 3D visualization
- D3
02 · Commercial · NDA01.2023 — 09.2023
Scientific Modeling Platform
An interactive editor for scientific modeling.
Commercial · under NDA
- React
- TypeScript
- Redux
03 · Commercial · anonymised07.2022 — 10.2024
Online Brand Protection Platform
Frontend interfaces for online brand protection and reviewing monitoring results.
Commercial · anonymised
- React
- TypeScript
- React Query
- Cypress
04 · Own project05.2025 — now
Workout Tracking & Coaching Platform
From a spreadsheet training plan to a workout app: AI import, workout logging, analytics and trainer–trainee management across web, PWA and mobile.
Web/PWA live · iOS in TestFlight
- React
- React Native
- TypeScript
- Bun · Elysia.js
05 · Own project · with my brother01.2026 — now
Rental Management App
A rental management app connecting owners and tenants, from adding a property and setting up a lease to communication and rental history.
In testing · demo available during an interview
- React Native
- Expo
- TypeScript
- NativeWind
06 · Commercial · anonymised10.2024 — 03.2025
EdTech Platform — AI-assisted Assessment
AI-assisted assessment with a teacher review interface, delivered end to end.
Commercial · anonymised
- React
- TypeScript
- AI integration
02
Experience
06.2022 — now
Full-stack Developer
Selleo
Develop React and TypeScript applications for clients in engineering software, education, scientific modeling and online brand protection. Responsible for frontend implementation: complex data views, interactive visualizations and reusable UI components. Contribute backend features, API integrations and automated frontend tests.
02.2020 — 01.2023
Frontend Web Developer, React & PHP
Twójpomysł.it
Built and maintained client websites and web apps in React, PHP and WordPress alongside technical school.
12.2020 — 05.2022
Web Development Tutor
Independent tutoring
Tutored students in building websites and web applications.
06.2021 — 08.2021
React Developer Intern
Selleo
Worked on frontend development with React and TypeScript.
03.2021 — 05.2021
Frontend Web Developer
Grupa EVADA
Built client websites.
02.2021 — 03.2021
Frontend Web Developer
Qualinet
Built client websites.
2018 — 2022
IT Technician
TEB Edukacja · education
Technical secondary school, IT technician qualification.
03
About
Frontend is my main specialization. I work across interface design, implementation, API integrations and testing, and contribute backend features when needed.
At Selleo I develop web applications for clients, including engineering tools and shared UI components. I build browser-based 3D viewers, interactive charts and analysis interfaces.
Outside client work, I build a workout tracking product and develop a rental management app with my brother. These projects include React Native apps and give me room to make product decisions and use what I build.
Main stack
- React
- TypeScript
- React Native
Where my work goes
Focus areas — bars show how central an area is, not a score
- Core
- Regular
- Working knowledge
- FrontendReact · TypeScript · JavaScript · Tailwind CSSCore
- 3D & data visualizationVTK · WebAssembly · Three.js · D3Regular
- MobileReact Native · Expo · NativeWindRegular
- State, data & testingTanStack Query · Zustand · Redux · Vitest · Playwright · CypressRegular
- Backend features & integrationsNode.js · Bun · Elysia.js · Fastify · FastAPI · PostgreSQL · AI integrationsRegular
- Cloud & infrastructureAWS · TerraformWorking knowledge
- Looking for
- Frontend or full-stack (frontend-leaning)
- Cooperation
- B2B
- Based in
- Bielsko-Biała, Poland
- Languages
- Polish (native) · English (B2)
04 — Contact
Hiring for a frontend or full-stack role?
Email or LinkedIn — both work.
matasinqwer@gmail.com