8 years building native Android apps — Kotlin, Jetpack Compose, clean architecture.
I've been building Android apps since 2018 — that's 8 years of shipping products from first sketch to Google Play release. I've taken more than a dozen apps through the full lifecycle, both in teams and solo.
I care about clean code, deliberate architecture and performance, without losing sight of the UX details that decide whether an app is a pleasure to use. I reach for new tools in the Android ecosystem when they genuinely raise the bar — not for novelty's sake.
I make fluent use of AI in my daily work — Claude (Claude Code) and ChatGPT — from generating and refactoring code to building my own skills and agents that automate my workflow. I treat AI as a real engineering tool, not a gimmick.
Native Android end-to-end — from architecture to release.
Selected projects. The list keeps growing.
Scan a textbook, AI creates the questions
An app that turns a parent into a home teacher. Scan a page from a textbook and AI (Bielik, a Polish LLM) generates ready-to-ask questions to quiz your child's knowledge — in seconds, no prep. Parent–child mode, a motivating learning streak, and questions read aloud (TTS). Kotlin + Jetpack Compose with a shared Kotlin Multiplatform (KMP) core — shipped on both Android and iOS, with automated releases from CI.
I deliver Android projects for clients across industries — some as Tech Lead: leading the team, code reviews, mentoring junior developers. I design the architecture (Clean Architecture, MVVM, MVI, SOLID) and own quality, performance and UX. Kotlin, Jetpack Compose, Coroutines/Flow, Hilt, CI/CD. Most engagements are covered by a non-disclosure agreement (NDA) — I can't disclose details or client names.
Built and maintained Android apps for a retail chain — including the app for Żabka's autonomous self-checkout store. Kotlin, MVVM, Coroutines/Flow, LiveData, Hilt + Koin, DataStore, Clean Architecture, MQTT, Navigation Component.
Google Play ↗Worked on and developed an Android app for a cooperative society. Kotlin, MVVM, Coroutines/Flow, Hilt, Room, REST.
Google Play ↗Led the design and development of a medical CTG app for doctors and nurses to interpret cardiotocography (CTG) readings — a domain demanding precision and reliability. Kotlin, MVVM, Coroutines/Flow, Hilt, DataStore.
Google Play ↗Where my Android journey began. I designed and implemented key features across a range of apps for the Polish State Forests, working with product managers and stakeholders. Java, Kotlin, MVC/MVVM, SQL, Firebase, REST.
Open to B2B collaboration, remote.
hello@petermikolajewicz.dev