Hire the Best QT Developers
in Serbia

I help companies build fast, reliable, and maintainable software with Rust and C++ across desktop, mobile, and backend environments. My focus is on performance-critical applications, native systems, and cross-platform products that need to work cleanly on Windows, macOS, Linux, iOS, and Android. I’m comfortable taking a project from architecture and implementation to debugging, optimization, release, and long-term maintenance. What I can help with: Rust and modern C++ development Cross-platform desktop and mobile apps Native libraries, SDKs, and system-level components Performance optimization and memory/concurrency issues API integration and backend connectivity Codebase refactoring, stabilization, and bug fixing Build systems, CI/CD, and release workflows I care about writing clean code, communicating clearly, and delivering solutions that are practical in production, not just technically interesting. Whether you need a new product built from scratch, a legacy C++ codebase improved, or a Rust migration done safely, I can help move it forward. If your project needs strong native engineering with a product mindset, I’d be glad to work with you.

Are you building a connected device, industrial system, or embedded Linux product and need someone who can own it end-to-end. From bare metal firmware to the UI running on top? That's exactly what I do. I'm a Senior Embedded Software Engineer with 7 years of experience shipping real products across industries - medical devices, solar energy systems, public transportation, and industrial automation. What I can bring to your project: - Embedded Linux development (custom distros, Yocto, BSP bring-up, ARM/aarch64) - Firmware development in C/C++ with FreeRTOS on STM32, ESP32, ARM Cortex - Qt/QML application development for embedded and desktop targets - IoT connectivity: MQTT, WebSockets, REST, Modbus, BLE, NFC, AWS/Azure SDKs - Communication protocols: UART, I²C, SPI, RS-485, TCP/UDP - System design, state machines, driver development, and hardware integration

I solve low-level problems. I’ve worked on Chromium source, custom native compilers, and high-performance systems. My background includes 5 years as an SDET and DevOps, meaning I deliver production-ready code backed by automated testing and stable CI/CD pipelines. Key Projects: - Antidetect Browser: Optimized Chromium internals and process models to bypass detection bottlenecks. - CEF Integration: Engineered a high-speed bridge for the Elastic language to manage native/frontend execution flow. - Isometric Engine: Built a 3D-physics engine in Raylib with custom binary serialization. - Networking: Implemented low-latency state syncing via WebSockets. The Deal: I provide technical foresight. If your architecture creates debt, I’ll propose a sustainable path.

Hello, everyone! My name is Sergey. I am living in Belgrade, Serbia. I have 10 years of experience in software development. My skills: ✓ C++ ✓ Qt ✓ QML ✓ QSS ✓ PowerShell ✓ Multithreading, memory management ✓ GoF Design Patterns, SOLID ✓ Unit tests ✓ UI/UX design ✓ Data processing ✓ Web-scraping ✓ JSON, XML ✓ Arduino (mostly hobby) Tools and libraries I am working with: ✓ Qt ✓ STL ✓ Doxygen ✓ SVN ✓ Git ✓ Gitlab Benefits you get working with me: ✓ DOCUMENTATION: I am using a pseudocode approach during writing the code so that any developer supporting my code might easily understand what were my intentions about during writing it. ✓ WARRANTY: I understand that nobody can fully test an application in 1-2 days so that during 1 month after finishing the project you can feel free to contact me if you find any bugs and I will fix them without any payment. ✓ FREE FEATURE REQUEST: Sometimes customers forget to describe some tiny feature in the project task. During 1 month after finishing the project you can ask me to add some feature that was not described in the initial task if its development won't take more than 8 additional hours. Only 1 free feature is allowed. Have any questions? Want to discuss your project? Or just want to get an advice? Feel free to contact me at any time! ;)