Rafał Niski

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ABOUT ME

Senior Android Developer

Rafał is a lead Android engineer with 12+ years of experience building production-grade Android systems using Clean Architecture, Kotlin, Coroutines, and Jetpack Compose. His background includes payments, real-time communication, hardware-integrated systems, and automotive applications, with hands-on architectural leadership.

Polish, English

Warsaw (+02:00)

Joined November 2017

EXPERTISE

Android

10 years experience

I'm an Android developer with five years of professional experience, including custom apps created for companies such as Jagermeister and...

I'm an Android developer with five years of professional experience, including custom apps created for companies such as Jagermeister and McDonald's. Among other things, I specialize in networking, beacons, and location services.

Realm Dagger Model-View-Presenter RxJava MVVM Espresso

Kotlin

10 years experience

When starting a greenfield project I prefer to write it in Kotlin, which gives me many opportunities to keep the codebase clean, scalable...

When starting a greenfield project I prefer to write it in Kotlin, which gives me many opportunities to keep the codebase clean, scalable and maintanable.

10 years experience

8 years experience

10 years experience

8 years experience

8 years experience

REVIEWS FROM CLIENTS

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SOCIAL PRESENCE

GitHub

AndroidTraining

Android application with implementation of developer.android.com training features.

Java

InstaTagViewer

Browse your favourite tags on Instagram fast and simple!

Java

EMPLOYMENTS

Lead Android Developer

Volvo Cars

2020-06-01-2025-12-01

Designed and enforced a multi-module Android architecture based on Clean Architecture, separating presentation, domain, and data ...

Designed and enforced a multi-module Android architecture based on Clean Architecture, separating presentation, domain, and data layers with strict dependency inversion and no direct framework dependencies in domain code.
Implemented presentation modules using Volvo’s PARCH pattern, explicitly separating View, Orchestrator, Presentable, and Observable, and enforcing unidirectional data flow from domain to UI.
Implemented a socket-based real-time chat using Quiq, handling connection lifecycle, message delivery guarantees, reconnection logic, and foreground/background transitions.
Built roadside assistance flows that collect and transmit vehicle data (VIN, location, driving state) to back-end services, handling permission, consent, and error scenarios on the client side.
Implemented client-side orchestration of EV charging sessions with ChargePoint chargers, handling session start/stop, charger state changes, and recovery from partial or failed sessions.
Implemented EV charging payments, including Visa tokenization, RFID card support, automated invoicing, and ChargePoint account linking with fallback and reconciliation logic.
Built smart home charging flows optimized for cost or carbon footprint, including user consent screens and gRPC-based communication with third-party energy optimization services.

Android

MVVM

Kotlin

Android

MVVM

Kotlin

Clean Architecture

Jetpack Compose

Senior Android Developer

OUTFRONT Media

2018-01-01-2020-06-01

Implemented an Android-based runtime for digital signage and programmatic advertising devices responsible for decoding, schedulin...

Implemented an Android-based runtime for digital signage and programmatic advertising devices responsible for decoding, scheduling, and rendering video and image content on large-format displays.
Developed software targeting custom Android hardware connected via HDMI, handling device boot, display configuration, and long-running unattended operation.
Designed and implemented synchronization logic to split a single advertisement into multiple segments and render them frame-aligned across adjacent displays.
Optimized media playback pipelines to minimize startup latency, reduce dropped frames, and maintain consistent playback timing across synchronized screens.
Implemented programmatic advertising support, integrating real-time ad delivery workflows, content scheduling, and playback control for dynamically served campaigns.

Android

Java

Streaming

Android

Java

Streaming

Kotlin

Aosp

Senior Android Developer

SafeTrek

2017-08-01-2018-01-01

Developed a Wear OS application from scratch, enabling personal safety workflows, including timed check-ins and automated escalat...

Developed a Wear OS application from scratch, enabling personal safety workflows, including timed check-ins and automated escalation when the user didn’t confirm safety.
Built a battery-efficient location tracking service optimized for wearables, balancing accuracy and power usage under strict background and connectivity constraints.
Integrated REST APIs for session management and event reporting, ensuring reliable delivery and graceful handling of offline and intermittent connectivity cases.
Created custom UI components for small screens using Canvas, focusing on readability, fast interactions, and reliable input under stress conditions.

MVVM

Kotlin

Clean Architecture

MVVM

Kotlin

Clean Architecture

Wearable data

PROJECTS

Heal - On-demand Doctor VisitsView Project

2017

Heal is a Uber-like app for requesting doctors to your home. I implemented the new design, created a whole scheduling system in the app, ...

Heal is a Uber-like app for requesting doctors to your home. I implemented the new design, created a whole scheduling system in the app, and fixed issues before releasing the app to Google employees.

Android

TravelBankView Project

2018

TravelBank is an expense app, powered by budgets. You can capture receipts on the go and track business expenses for reimbursement or tax...

TravelBank is an expense app, powered by budgets. You can capture receipts on the go and track business expenses for reimbursement or tax purposes. I was responsible for creating a new feature for booking flight tickets.

Android