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Dmitrii Bainak

@dmitriibainak

Android Architecture Consultant at Bit Gate Fintech Technologie, designing the native Android foundation for GateX’s React Native migration.

Serbia

Message

At Bit Gate Fintech Technologie, I led the initial architectural design for GateX’s migration from React Native to native Android. I also established an AI-first development workflow and served as the team’s technical reference for native Android architecture.

At NatLex Ltd., I rewrote a large offline-first construction-management app used by Strabag project teams, moving it to Kotlin, Jetpack Compose, Coroutines, Flow, Retrofit, OkHttp, and Room. I designed local data handling for tens of GB of storage, background sync, and switching accounts or backend environments while previous sync work continued.

I authored roughly 50 Room database migrations and led and mentored two junior developers as they grew into mid-level and senior roles. Earlier, I built Android features for Tutor. Mathematics and worked on PACS architecture and medical imaging at Karlsruhe Institute of Technology (KIT).

Experience

Work history, roles, and key accomplishments

Current

Android Architecture Consultant / AI-First Process Lead

Current

Bit Gate Fintech Technologie

Mar 2026 - Present (6 months)

▪ Led initial architectural design for the migration of GateX app from React Native to native Android, guiding a team with no prior native Android experience through the foundational structure of a ground-up rebuild;

▪ Established an AI-first development workflow to accelerate onboarding and build-out, helping the team ramp up on native Android patterns and practices from scratch;

▪ Served as th

Senior Android Developer

"NatLex" Ltd

Feb 2019 - Jan 2026 (6 years 11 months)

▪ Owned Android development for a large, offline-first construction-management application used by Strabag project teams, built around thousands of dynamic, per-project document templates.

▪ Rewrote the app from the ground up in a modern Kotlin stack (Jetpack Compose, Coroutines, Flow, Retrofit, OkHttp, Room), replacing a legacy Java/RxJava/XML/Dagger 2/Realm codebase, and evolved the architectur

Junior Android Developer

Trinity Digital

Sep 2018 - Oct 2018 (1 month)

Built Android features for 'Tutor. Mathematics,' an ed-tech platform connecting tutors with students preparing for Russia's national math exams.

Trainee

Karlsruhe Institute of Technology (KIT)

Nov 2016 - Apr 2017 (5 months)

▪ Designed and implemented system architecture for a PACS (Picture Archiving and Communication System) infrastructure supporting the USCT-3D ultrasound research project.

▪ Installed and configured the PACS server and integrated client-side software, including DICOM viewer and reconstruction tooling.

▪ Applied Java and MATLAB to medical imaging and digital image processing tasks.