Олександр

Oleksandr Dyrda
Senior / Lead Flutter Engineer | BLE / IoT | Connected Devices | SDK Development
Ukraine (Remote, CET overlap) | [открыть контакты](см. выше в блоке «контактная информация») | [открыть контакты](см. выше в блоке «контактная информация») | Telegram: @oleksandrsokolov788

PROFESSIONAL SUMMARY
Senior / Lead Flutter engineer with 5+ years of production mobile development, specialized in applications that communicate
with physical devices. Hands-on experience includes two custom BLE/GATT integrations built with flutter_blue_plus for Transtek
medical devices, plus a native Polar Verity Sense integration through Kotlin and the official Polar SDK. Strong in Flutter
architecture, asynchronous state, transport reliability, native platform bridges, diagnostic tooling, code review, mentoring, and AI-
assisted engineering.

CORE EXPERTISE
Flutter / Dart: Clean and modular architecture, state BLE / GATT: flutter_blue_plus, scanning, services/characteristics,
management, isolates, streams, async patterns notifications, MTU, binary protocols
Protocol Reliability: CRC32, ACK/NACK, multi-frame assembly, Native Integration: Android/Kotlin, iOS/Swift, MethodChannel,
retries, timeouts, reconnect and recovery EventChannel, native SDK bridges
Connected Devices: Blood pressure monitors, smart scales, Product Engineering: REST, WebSocket, Firebase, SQLite/Drift,
Polar wearables, ESP32 sensors, UVC/IR cameras offline-first, Git, CI/CD, store publishing
Leadership: Architecture ownership, code reviews, technical AI Tooling: OpenAI/GPT integrations, Cursor/Claude/ChatGPT
interviews, mentoring, documentation workflows, structured AI automation

SELECTED BLE AND CONNECTED-DEVICE EXPERIENCE
Transtek Blood Pressure Monitor - Custom BLE Protocol
Flutter, Dart, flutter_blue_plus, BLE/GATT, binary protocol
• Designed and implemented the complete device protocol in Flutter: discovery, connection lifecycle, service and characteristic
resolution, initialization/handshake, command exchange, notifications, packet assembly and typed parsing.
• Handled binary payload validation, measurement synchronization, timeouts, retries, reconnect behavior and production
diagnostics for real medical-device states.
• Integrated decoded blood-pressure results into the application measurement workflow and backend delivery pipeline.
Transtek / Lifesense Smart Scales - Custom BLE Protocol
Flutter, Dart, flutter_blue_plus, BLE/GATT, body-composition data
• Implemented a separate end-to-end protocol for connected scales, including pairing/registration, device identification, session
orchestration, measurement requests and notification handling.
• Decoded weight, impedance and body-composition packets into typed domain models and integrated them with patient
measurement flows and API synchronization.
• Built explicit connection-state handling and recovery paths instead of relying on ideal BLE behavior.
Polar Verity Sense - Native SDK Integration
Flutter, Kotlin, Polar BLE SDK, MethodChannel, EventChannel
• Built and maintained the Flutter-to-Kotlin bridge for concurrent HR, PPG, PPI, accelerometer, gyroscope and magnetometer
streams.
• Worked on capability detection, SDK mode, stream lifecycle, typed errors, offline recordings, device storage operations,
listener reattachment and high-frequency event delivery.
• Added diagnostic state reporting and recovery logic for background, session and device-mode transitions.

ADDITIONAL RELEVANT PROJECTS
UVC4Flutter / Infrared Camera Integration
Flutter plugin, Android native, UVC, camera SDK, real-time frames
• Integrated external USB/UVC and infrared cameras with Flutter, including native Android boundaries, frame geometry,
lifecycle handling and real-time overlays.
ESP32 Motion and Environmental Sensors
Flutter, BLE, IMU, multi-device orchestration
• Built reusable BLE modules for ordered IMU/environment packets, session aggregation and backend compute integration.

Oleksandr Dyrda | Senior Flutter / BLE Engineer
PROFESSIONAL EXPERIENCE
Lead Flutter Engineer / Technical Lead - Scutum Security Ecosystem
Remote | Mobile Security | iOS / Android
• Led Flutter engineering across security products, making architecture decisions, reviewing code, improving standards and
stabilizing production releases.
• Built secure authentication, encrypted storage, anti-theft flows, permission-sensitive features and native integrations for iOS
and Android.
• Handled App Store and Google Play publishing, subscriptions/licensing, review blockers and security-policy constraints.
• Conducted technical interviews and live coding, mentored Junior and Trainee developers, and supported onboarding and
internal knowledge sharing.
Lead Flutter Engineer - Clinical Device BLE SDK
Remote | NDA | Medical / HealthTech
• Built a production Flutter SDK for medical telemetry devices with GATT communication, binary frames, MTU tuning, multi-
frame assembly and session orchestration.
• Implemented sequence validation, CRC32 integrity checks, ACK/NACK recovery, retries and timeouts for unstable or
undocumented firmware behavior.
• Decoded waveform and pulse telemetry and built session recording, live traces and diagnostic tooling for device-level
debugging.
Senior Flutter Engineer - Connected Health and Product Engineering
Remote | Flutter / Android Native / IoT
• Developed Oranta Mobile, a connected HealthTech platform integrating medical devices, wearables, UVC/infrared cameras,
sensor pipelines, local persistence and backend compute APIs.
• Worked across Flutter, Kotlin, REST, WebSocket, Firebase, SQLite/Drift, offline outbox patterns, PDF reporting and real-time
telemetry.
• Stabilized legacy codebases, corrected asynchronous flow problems, improved performance and refactored complex features
into maintainable modules.

ADDITIONAL PRODUCT AND AI PROJECTS
Oranta Job Agent and AI Automation
Python, FastAPI, LangGraph, Playwright, Flutter client
• Built an approval-gated AI workflow for job ingestion, scoring, artifact generation, browser automation, CRM and audit logging.
• Use AI tools daily for codebase analysis, implementation planning, debugging, tests and documentation while keeping
validation and architecture decisions explicit.
Keyora / AutoPass Secure Vault
Flutter, Drift, Argon2id, AES-GCM, Android/iOS/macOS/browser integration
• Developed a zero-knowledge credential vault with encrypted storage, cross-platform autofill, secure synchronization and
native platform extensions.

KEY ACHIEVEMENTS
• Built multiple production BLE integrations spanning direct flutter_blue_plus protocols and native vendor SDK bridges.
• Turned undocumented or unstable device behavior into observable, testable and recoverable mobile workflows.
• Shipped production applications for Android and iOS and led technical quality through reviews, mentoring and hiring.
• Worked effectively across mobile UI, transport layers, firmware-facing protocols, local persistence and backend delivery.

EDUCATION AND LANGUAGES
Computer Science - self-directed engineering track. English: B2. Ukrainian: Native. Russian: Native.

Oleksandr Dyrda | Senior Flutter / BLE Engineer