Your idea, built for
every screen.
I design and develop custom websites, native mobile apps, and cross-platform solutions — from first wireframe to launch day.
Solo dev. Full stack.
Zero BS.
Hey, I'm Mateusz — the developer behind MefjuDev. I build custom websites and mobile apps from scratch: clean code, direct communication, no outsourcing. You work with me from first call to launch.
The right tool for
the right job.
Every project gets the right stack — I don't force one-size-fits-all solutions.
Websites & Web Apps
Landing pages that convert, SaaS dashboards that scale, e-commerce stores that sell — fast, responsive, and SEO-ready.
Native Mobile Apps
Buttery-smooth iOS and Android apps with full hardware access — camera, notifications, offline storage, and gestures that feel right.
Cross-Platform Apps
One codebase running on iOS, Android, and web. Ship faster without sacrificing the native experience your users expect.
Real projects. Real results.
LenderBridge.ai
Avoid foreclosure, get a fresh start. Negotiates directly with mortgage lenders to approve short sales.
E-Commerce Store
Online store for handmade wire bouquets with Stripe checkout, order tracking, and inventory management.
PintRadar
Find pint bars nearby, rate them, leave reviews, and connect with other beer enthusiasts.
Moums
Find nearby makeup artists, book appointments, chat or call. Artist accounts manage portfolios and payments.
Creator Creator
AI-powered insights to boost social media performance and help creators grow their audience.
CashFlow
Financial tracker app for managing income, expenses, budgets, and visualizing spending habits.
Don't take my word for it.
Real feedback from real clients on Upwork and Fiverr.
“Every request was handled professionally, and he went above and beyond to make sure everything worked perfectly. Communication was smooth, delivery was fast, and the final result exceeded my expectations.”
“So responsive, helpful, understanding and thorough in supporting me through coding and launching my apps on the App Store. Really appreciate it.”
“Thank you for completing the project. I really appreciate the great communication, the frequent updates, and how quickly you handled the bug fixes. It was a pleasure working with you!”
No surprises.
Just results.
A proven process that keeps you in the loop at every stage.
Listen First
I dig into your business goals, users, and constraints before touching a single pixel. The right solution starts with the right questions.
Scope & Plan
We nail down the features, tech stack, and timeline. You know exactly what's being built and how long it'll take — no surprises.
Build in the Open
Agile sprints with live demos. You get working software to test every week, not a big reveal at the end.
Launch & Own It
I deploy, test on real devices, and hand everything over. Need ongoing support? I'm here. Want to take it in-house? It's all yours.
Tell me what you're building.
Send me your project details or book a free call — whatever works best for you.