A senior product studio. Discover, design, build, ship — every project told as a clear story, from first idea to a live App Store listing.
Native iOS & Android plus cross-platform builds with React Native and Flutter — fast, fluid, built to scale.
Dashboards, SaaS platforms, and progressive web apps using React, Next.js, and Node — built for real load.
Research, prototypes, and design systems. Interfaces that feel obvious and look unmistakably yours.
APIs, microservices, and real-time infrastructure on AWS, GCP, and Azure — reliable and observable.
Assistants, automation, and recommendations powered by modern LLMs and custom models.
CI/CD pipelines, monitoring, and post-launch iteration driven by what your users actually do.
Telemedicine & patient management · 50k+ users
Real-time analytics platform with custom charting
Shopping app with AR try-on & AI recommendations
Fleet tracking & route optimization dashboard
We map your business, users, and goals — then scope requirements and risks before any code is written.
Wireframes become clickable prototypes. We validate ideas early, while changes are still cheap.
Two-week sprints, live demos, clean code, and automated testing at every checkpoint.
Store submission, production deploy, analytics — then we iterate based on real data.
We don't just write code — we build with intent.
Bartosiak Sp. z o.o. is a product-minded software studio based in Rawicz, Poland. We partner with founders and established companies to build apps that move the needle — not just check a box.
We think about your users, your business model, and where you're headed — then build accordingly.
"They shipped two weeks early and the polish was extraordinary. Our users noticed the quality immediately."
"Like having a co-founder who happened to be a brilliant engineer. They pushed us — for the better."
"The backend they built handles millions of events a second without flinching. Exceptional depth."
Call us, or leave a brief below — we'll get back to you within 24 hours with a tailored proposal.