Marcin Brzozowski
Mobile and security by focus. Equally at home in a fast-moving startup or a large enterprise, hands-on or leading, and used to working across diverse, multicultural teams. I care as much about the people as the code, and the ones I work with tend to stay.
Available for full-time, contract, or short-term work. B2B via my own company, MOBILART (Poland).
Industries
Retail · Fintech · Banking · Automotive · Security
Experience
My independent software practice, building mobile and security solutions for clients across several industries.
🔒 Some projects are under NDA, but I'm happy to walk you through them in a conversation.
Loyalty app for business clients built on a modular, test-driven MVI architecture. Led the migration to Jetpack Compose for a clean, maintainable codebase.
Card loyalty app used by millions in Poland. Integrated external stores via WebView, shipped new features and modernized the app to MVVM + Compose.
Analyzed Android apps for malicious behavior (phishing, trojans) via static and dynamic analysis: Frida, Ghidra, JADX, Burp Suite. Lisbon, Portugal.
Secure authentication app (OTP, push validation, scanner support) for global banks, with white-label config at build time. Maintained a legacy RxJava2/MVP app and contributed to internal SDKs.
Foto-GIS, a geotagging and documentation tool for field workers (construction, forestry, environmental), with offline support and online synchronization.
Skills
- Languages
- Kotlin, Java
- Android
- Jetpack Compose, Room, Navigation, DataStore, Paging, WorkManager, ViewModel, Lifecycle, StateFlow, CameraX, Material 3
- Architecture
- MVI, MVVM, MVP, Clean Architecture, SOLID, design patterns
- Async & network
- Coroutines, Flow, RxJava2, Retrofit2, OkHttp3, REST, gRPC, WebSockets
- DI & data
- Hilt / Dagger2, Koin, Firebase, Room, SQLite, Realm
- Testing
- JUnit, MockK, Mockito, Compose UI Testing, Espresso, UI Automator, Robolectric, Turbine, Appium, Firebase Test Lab, Sauce Labs, JaCoCo
- Security
- OWASP, reverse engineering: Frida, Ghidra, JADX, Burp
- CI/CD & tools
- GitHub Actions, GitLab, Jenkins, git / gitflow, Jira, Figma, Sketch, Detekt, ktlint
- Ways of working
- Agile, Scrum, SAFe · AI-assisted (Cursor, Claude, Windsurf, Codex, Glean)
Education
Białystok University of Technology
Białystok University of Technology
Languages
🇵🇱 Polish: native · 🇬🇧 English: advanced (IELTS Academic certified)
Beyond code
Astronomy · Psychology · Economics · Music · Art · Photography · Travelling
Contact
marcin[at]brzozowski.dev linkedin.com/in/mabrzozowski Prefer to keep it secure? PGP 0xE00C109A07093B12