Open to opportunities

Serge Rr

@sergerr

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Lead Flutter Developer and architect specializing in secure, high-load mobile apps across regulated domains.

Poland

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What I'm looking for

I’m looking to lead Flutter and mobile architecture for secure, high-performance products—owning technical direction, performance engineering, and scalable data/communication design—while mentoring engineers and partnering with product, QA, and design.

I’m a Lead Flutter Developer with 15+ years delivering complex, high-load mobile products and 5+ years building production-grade Flutter applications in regulated, security-critical domains like cybersecurity and healthcare.

I architect scalable systems using Clean Architecture, MVVM, and BLoC, optimizing performance through profiling and stress testing. I focus on secure communication, BLE integrations, and offline-first data layers, while strengthening quality with automated test coverage and code/request protection strategies.

I also bring a strong native Android background (Kotlin/Java) to build platform-channel modules and performance-critical features. I enjoy technical leadership—mentoring and onboarding engineers—and driving product quality across enterprise and startup environments.

Experience

Work history, roles, and key accomplishments

Current

Lead Flutter Developer

Current

ScienceSoft

Apr 2023 - Present (3 years 3 months)

Owned end-to-end architecture and technical direction for a secure encrypted messaging platform. Led performance profiling, stress testing, and implemented code and request protection strategies, while mentoring engineers.

Retrofit SQLite Cryptocurrency FFMPEG Flutter_secure_storage Secure Messaging Performance Profiling Security

Flutter Software Engineer

GlobalLogic

Mar 2020 - Apr 2023 (3 years 1 month)

Designed core architecture and delivered features for a BLE-connected blood glucose monitoring app used to track readings, trigger alerts, and sync with clinicians. Improved database performance and API efficiency and performed stress testing and edge-case analysis.

Dart Kotlin Java Firebase Sqflite Performance Profiling

Senior Android Developer / Architect

GlobalLogic

Apr 2018 - Feb 2020 (1 year 10 months)

Designed and implemented end-to-end architecture for PoC products including a face-recognition car configuration tool, an AR/object-detection app for industrial sensors, and a BLE sensor-diagnostics tool. Built native C++ libraries for device-data documentation generation and developed custom Android views with BLE integrations.

Android C++Android View Object Detection

Android Developer

EPAM Systems

Jan 2017 - Mar 2018 (1 year 2 months)

Developed new functionality and UI for a multi-provider media streaming portal used across services like Netflix and HBO. Worked within a team of 30+ supporting mobile services.

Indie Android Developer

Freelance

Jan 2011 - Jan 2017 (6 years)

Designed and shipped Android games as an independent developer during 2011 to 2017. Managed the full development cycle for indie Android game releases.

Android Development

Software Engineer

Savushkin Product

Jan 2011 - Jan 2017 (6 years)

Developed and supported internal Android and Qt/C++ desktop-embedded software for a large food and beverage manufacturer. Worked on ongoing product support and development from 2011 to 2017.

Android C++