Mobile apps
Cross-platform products for iOS and Android – thoughtfully engineered, ready for real users and real stores.
I'm Marcin Falkowski – a Senior React Native Developer at AEXOL and the person behind DewXIT. I came from the web, went deep into mobile, and now work with AI as a practical part of product engineering.
I work across the full product lifecycle – from early technical decisions through implementation, release and iteration.
Tell me what you're building
2010first lines of code
2022working professionally
3platforms: iOS, Android, web
02 – What I do
React Native.
And beyond.
React Native is the focus of my current work. My experience also includes web applications, app releases and AI integration.
Web apps
Fast, focused web products built on a strong mobile background and a clear understanding of the whole system.
Zero to store
From the first rough idea through architecture, implementation, release and the unglamorous details in between.
AI integration
Useful AI inside products and engineering workflows – applied where it creates leverage, not where it creates noise.
03 – Selected work
Products over
presentations.
A selection of products and experiments I've built.
01Mobile / iOS + Android
mam chwilę
A mobile app that turns 5, 15 or 30 spare minutes into one concrete thing worth doing. Choose a direction or let the app decide, then follow a focused activity through to completion.
02Independent R&D / AI + OSINT
S.Z.K.W.A.Ł.
An operational radar that turns live aviation data into a readable picture of what is happening now – with AI-assisted situational assessment and an interface built for dense information.
03Web product / Open source
Colorazzo
A fast color-palette generator for designers and developers. Multiple generation methods, accessible results and instant export – without sign-up friction.
04Developer tool / Web + CLI + MCP
SquareOne
One image in, a complete app icon set out. Generate icons for iOS, Android, Expo and Flutter – in the browser, from the terminal or through an AI coding agent. Local processing, ready-to-use assets.
05Developer tool / Web + CLI + MCP
Splashyyy
One logo in, launch-ready splash screens out. Create assets for iOS, Android, Expo and Flutter, with dark mode and platform configs – from the browser, terminal or an AI coding agent.
04 – Writing
Some problems deserve
more than a commit.
Field notes on React Native, estimation and the tools changing how we build software.
Pick an article on the phone.
By Marcin Falkowski
Field notes
Things worth writing down.
How I work
Clear thinking,
honest trade-offs,
software that ships.
I'm at my best with teams that care about the product and want an engineering partner who can see beyond the next ticket.
05 – Contact
Based in Poland / working globally