Олег

[open contact info](look above in the "contact info" section)
Oleg Tiurikov [open contact info](look above in the "contact info" section)
Ukraine
[open contact info](look above in the "contact info" section)

Senior Android Developer | Java Backend Development

PROFESSIONAL SUMMARY
Senior Android Developer with 7+ years of experience delivering production applications in digital security and
precision agriculture. Strong in Kotlin/Java, Jetpack Compose, Coroutines/Flow, clean architecture, offline-first
systems, geospatial visualization, billing, and application reliability. Uses ChatGPT, Codex, and Claude for
implementation, refactoring, debugging, code review, tests, documentation, and custom AI workflows. Expanding into
Java backend development with Spring Boot, REST APIs, backend services, and automated tests.

CORE SKILLS
Languages & UI Kotlin, Java, Jetpack Compose, View Binding, custom views, animations

Architecture Clean Architecture, MVVM, MVI, MVP, Navigation Component, Hilt

Data & Async Coroutines, Flow, LiveData, Room, WorkManager, Retrofit/OkHttp, gRPC, Protobuf

Platforms Mapbox Maps SDK, Firebase, Google Play Console, Google Play Billing

Quality & Security Unit testing, Sentry, encryption/decryption, backup and synchronization

Cryptography JCA/JCE (javax.crypto), Google Tink (Streaming AEAD), AES-GCM, RSA, HMAC, PBKDF2,
Argon2id, X25519, Ed25519

AI Development ChatGPT, Codex, Claude, prompt engineering, custom skills and workflows

Java Backend Java, Spring Boot, REST APIs, Spring Data JPA, Hibernate, SQL, JUnit, Mockito, Docker

PROFESSIONAL EXPERIENCE
Senior Android Developer Feb 2025 - Jul 2026
OneSoil
• Developed precision-agriculture features using interactive Mapbox maps and raster, symbol, line, and annotation
layers.
• Built real-time geolocation tracking and map-based navigation with smooth position updates.
• Integrated weather data, satellite imagery, and NDVI/NDWI vegetation indices to support field analytics.
• Created field-linked notes and media annotations plus weather and precipitation overlays.
• Implemented offline workflows with local caching, background synchronization, and conflict handling.
• Integrated Google Play Billing for purchases and subscriptions, including verification and entitlement management.

Android Developer Mar 2019 - Dec 2024
X-Torus
• Delivered Android applications end-to-end, from implementation through release and ongoing support.
• Defined coding rules and development guidelines to improve consistency across software projects.
• Built features for financial records, personal-data processing, statistics, and chart-based visualization.
• Implemented image/avatar editing, custom UI and animations, inter-app integrations, and third-party application porting.
• Implemented cryptographic workflows for sensitive data: authenticated encryption, key derivation, digital signatures,
and secure key exchange.
• Added backup workflows, unit tests, and Sentry crash monitoring.
• Maintained and enhanced projects originally developed by other team members.

EDUCATION & LANGUAGES
M.S., Artificial Intelligence Systems Languages
National University Zaporizhzhia Polytechnic, 2020-2022 English - C1
Ukrainian - Native
B.S., Software Engineering English Studies
National University Zaporizhzhia Polytechnic, 2016-2020 English Center Polyglot, 2020-2026

Oleg Tiurikov | Senior Android Developer | Java Backend Development