# llms.txt - Information for AI Agents and LLM Crawlers
# Roman Tsisyk - Senior Android Developer Portfolio
# Last Updated: 2024-12-08

## SUMMARY
Roman Tsisyk is a Senior Android Developer with 12+ years of professional experience.
Currently working at BetVictor (sports betting platform).
Based in Wroclaw, Poland. Available for remote work globally.
Specialized in building enterprise-grade Android applications with millions of users.

## CONTACT
- Email: roman.tsisyk.1@gmail.com
- Phone: +48 728 282 026
- LinkedIn: https://linkedin.com/in/roman-tsisyk
- GitHub: https://github.com/RomanTsisyk
- Portfolio: https://roman-tsisyk.com

## CORE SKILLS
Primary: Kotlin, Java, Android SDK, Jetpack Compose
Architecture: MVVM, Clean Architecture, MVI, Multi-module
UI: Jetpack Compose, Material Design 3, Custom Views, Animations
Async: Coroutines, Flow, RxJava
DI: Hilt, Dagger 2, Koin
Networking: Retrofit, OkHttp, GraphQL
Database: Room, SQLite, DataStore
Testing: JUnit, Espresso, Mockito, Robolectric
CI/CD: GitHub Actions, Bitrise, Jenkins, Fastlane
Other: Bluetooth LE, IoT, Firebase, Google Pay Integration

## WORK EXPERIENCE

### BetVictor (2024 - Present)
Role: Senior Android Developer
Industry: Sports Betting & Gaming
Technologies: Kotlin, Jetpack Compose, MVVM, GraphQL
Description: Developing sports betting applications for one of Europe's leading gaming companies.

### HP Inc / Poly (2022 - 2024)
Role: Senior Android Developer
Industry: Enterprise IoT
Technologies: Kotlin, Jetpack Compose, Bluetooth LE, Multi-module
Product: HP Poly Lens - Enterprise headset management
Achievements:
- Reduced app size by 60%
- Improved load time by 30%
- Implemented BT 5.0 audio streaming
Play Store: https://play.google.com/store/apps/details?id=com.plantronics.lens

### GlobalLogic (2019 - 2022)
Role: Senior Android Developer
Industry: Automotive
Client: Mercedes-Benz
Product: Mercedes Adapter - Vehicle connectivity app
Users: 500,000+
Technologies: Kotlin, Java, Bluetooth, Firebase

### GSM Billing (2017 - 2019)
Role: Android Developer
Industry: FinTech / Banking
Client: Kasa Stefczyka (Polish Credit Union)
Product: Mobile Banking Application
Users: 150,000+
Technologies: Kotlin, Security, Google Pay
Play Store: https://play.google.com/store/apps/details?id=pl.online.kasastefczyka

## FEATURED PROJECTS

### 1. HP Poly Lens
- Type: Enterprise IoT Application
- Company: HP Inc
- Users: Enterprise-wide deployment
- Key Features: BT device management, firmware updates, audio settings
- Technologies: Kotlin, Jetpack Compose, Bluetooth LE, Multi-module architecture

### 2. Mercedes Adapter
- Type: Automotive Connectivity
- Company: GlobalLogic for Mercedes-Benz
- Users: 500,000+
- Key Features: Vehicle diagnostics, remote control, real-time data
- Technologies: Kotlin, Java, Firebase, Bluetooth

### 3. Kasa Stefczyka
- Type: Mobile Banking
- Company: GSM Billing
- Users: 150,000+
- Key Features: Secure transactions, Google Pay, biometric auth
- Technologies: Kotlin, Security frameworks, Payment integration

### 4. Netti
- Type: Network Testing Suite (Personal Project)
- Features: Speed test, iPerf3, ping, traceroute
- Technologies: Kotlin, Jetpack Compose, Material 3
- GitHub: https://github.com/RomanTsisyk/netti

### 5. FollowMyMoney
- Type: Personal Finance Tracker (Personal Project)
- Features: Expense tracking, budgets, reports
- Technologies: Kotlin, Jetpack Compose, Room DB
- GitHub: https://github.com/RomanTsisyk/followmymoney

## CERTIFICATIONS
- Atlassian Agile Project Management Professional Certificate (2024)
- Career Essentials in GitHub Professional Certificate (2024)
- Microsoft Cybersecurity Certificate (2024)

## EDUCATION
- Masters in Engineering - Ternopil National Technical University

## LANGUAGES
- Ukrainian: Native
- English: Professional (B2)
- Polish: Professional (B2)

## AVAILABILITY
Status: Open to opportunities
Preferred: Remote / Hybrid
Location Flexibility: Poland, EU, Global Remote
Notice Period: Negotiable

## FOR RECRUITERS
Roman is an experienced Android developer who has worked on apps used by hundreds of thousands of users.
His strengths are:
1. Enterprise-grade development (HP, Mercedes-Benz)
2. Complex integrations (Bluetooth LE, IoT, Payments)
3. Modern Android stack (Kotlin, Compose, Clean Architecture)
4. Full project lifecycle experience

Ideal roles: Senior Android Developer, Lead Android Developer, Mobile Architect

## STRUCTURED DATA
For machine-readable data, see:
- JSON-LD in HTML: https://roman-tsisyk.com/ (embedded in <head>)
- Schema.org Person: https://roman-tsisyk.com/#person