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Senior C/C++ engineer with 25+ years of experience in cross-platform software development (Windows/Linux) and POS integrations. Strong background in fiscalization and compliance-driven systems, including device drivers, receipt/printing pipelines, and transaction reliability for multi-country deployments (20+ markets). Expert in cashless payment drivers and payment workflows, as well as POS feature integrations such as loyalty systems and lottery flows. Hands-on experience bridging low-level components (C/C++, device protocols, Qt printing) with service/back-end layers (Go/Rust, REST) and operational data storage (PostgreSQL/MySQL). Known for building long-lived, maintainable production systems, deep debugging of complex field issues, and delivering stable solutions under strict legal and operational constraints. Hands-on experience with ESP32 and Raspberry Pi hardware/software development, including edge connectivity (Wi-Fi/BLE/MQTT), peripheral integration, and resilient device control. Applied OpenAI Codex CLI, Google Gemini CLI, VS Code, Cursor, and Google Antigravity to accelerate prototyping, refactoring, test scaffolding, and technical documentation in production workflows. CORE TECHNICAL STACK: •Domains: POS Integrations; Fiscalization & Compliance; Payments (EFT/POS, cashless/QR); Loyalty; Lottery; Receipt/Printing; Localization. •Languages: C, C++, C#, Java, Go, Rust (REST services), Delphi, JavaScript (POS/Kiosk business logic), Python, Lua, Tcl/Tk. •Frameworks/Libraries: Qt 5/6 (custom static builds); Boost. •OS: Windows, Linux. •Build/Tools: CMake, Git, MSVC, GCC, YACC/BISON. •Protocols/Device I/O: Serial/RS-232; TCP/IP networking; device/printer protocol integration; JSON/XML transaction payloads. •Embedded/IoT: ESP32 (ESP-IDF, FreeRTOS), Raspberry Pi (Linux edge services), UART/SPI/I2C, GPIO, MQTT, OTA updates. •Data/Storage: PostgreSQL; MySQL; Amazon S3 (receipt storage/optimization); Paradox (legacy). •AI Engineering Tools: OpenAI Codex CLI, Google Gemini CLI, VS Code, Cursor, Google Antigravity (code generation, debugging support, test scaffolding, documentation).

Experienced full-stack developer with 8+ years of programming expertise and a strong academic foundation (BSc & MSc in Computer Science). Proven track record delivering clean, efficient code across diverse projects, including embedded systems, QT cross-platform applications, and full-stack web solutions. Key Skills: C++, Go, Python, JavaScript, SQL, Git, Bootstrap, Embedded Development, QT I can adapt quickly to new technologies and project requirements, apply my skills in a wide range, and learn new concepts effectively. I'm looking for part-time contracts and temporary projects where I can leverage my skills that allow me to grow as a developer.

I have overall about 14 years of experience in software development. The programming languages I mostly prefer to work with are C++ and C#.NET - in these languages I have 5+ years of experience. Throughout my career I've worked in the following industries: - Finance / trading - Telecommunications - Automotive I worked on various fields: - HMI development for vehicles (Qt/C++) - UI development for Windows platforms (C#.NET, WPF) - Cross-platform (including, Windows, Linux, Android, iOS) UI Engine development (C++) - Backend development on Linux (C++) - Web development (Html5, Javascript) - Mobile development (Flutter, Qt)