Services
Android App Development Warsaw
Kotlin-powered Android apps built to handle real-world scale — from first release to millions of Play Store installs.
The Challenge
Android's device fragmentation is brutal: thousands of screen sizes, OS versions, and manufacturer quirks that can turn a clean design into a support nightmare. Teams that don't plan for this end up with an app that works great on the developer's Pixel and breaks everywhere else.
On top of that, Google Play's review process, background execution limits, and battery-optimisation rules change often enough that apps built without ongoing platform expertise quietly degrade — slower launches, killed background jobs, and rising uninstall rates nobody notices until it's a crisis.
Our Approach
We build Android apps in Kotlin with Jetpack Compose, targeting a defined device and OS support matrix agreed with you upfront — so there are no surprises in the field. Architecture follows Google's recommended app architecture (MVVM + Repository pattern) from day one, keeping the codebase testable as the team and feature set grow.
We agree on device coverage and release checks for each project. Test results, video reports and shared task trackers keep clients informed about quality, open issues and release readiness.
What's Included
Kotlin & Jetpack Compose
Modern, fully native Android UI — declarative, testable, and fast to iterate on.
Play Store Readiness
Store listing, staged rollouts, and Play Console health checks so releases ship with confidence.
Device Fragmentation Testing
Real-device testing across manufacturers and OS versions, not just the emulator that happens to work.
Enterprise-Grade Security
Encrypted local storage, certificate pinning, and Play Integrity API for apps handling sensitive data.
Technologies We Use
KotlinJetpack ComposeCoroutinesRoomHiltWorkManagerJUnitFirebase
Our Development Process
01
Discovery & Device Matrix
We agree on the exact OS versions, screen sizes, and manufacturers the app needs to support, then design the architecture around it.
02
Design System Setup
A shared Jetpack Compose component library ships first, keeping every later screen fast to build and visually consistent.
03
Sprint-Based Development
Two-week sprints, each ending in a build you can install and test on your own device.
04
Device Lab QA
Testing on agreed devices and OS versions, supported by automated checks and documented results before release.
05
Staged Rollout & Support
We launch with a staged rollout, watch crash-free rates and ANR reports, and ship fast-follow fixes as needed.
Related Projects
Our first collaboration with Sparkler Soft and Sergey on Azarium, a real estate investment app with crypto payments, was an excellent experience. The team successfully delivered the entire product from concept to launch, including two mobile applications, an admin panel, backend infrastructure, and AWS DevOps. Throughout the project, they demonstrated strong technical expertise, a highly professional approach, and consistent attention to quality. The execution was excellent, and the final outcome met our expectations in every respect. Communication was seamless, efficient, and maintained at the highest standard throughout the engagement. We highly value this cooperation and confidently recommend Sparkler Soft and Sergey as a reliable and capable technology partner.
Direct client feedback · June 2026
Frequently Asked Questions
We agree on a minimum SDK version with you based on your actual user base — typically covering 95%+ of active devices — and test against it throughout development, not just at the end.
Start Your Android Development Project
Tell us about your project and get a free estimate within 48 hours.