Oleksandr B.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 8, 2026.

Senior C/C++ engineer and system architect, 20+ years. I design and build performance-critical products end to end: real-time audio/video media pipelines, Windows kernel drivers, cross-platform services and Qt clients, embedded (STM32/ESP32), and NPU/edge optimization where it matters. Primary language is C/C++; I also work in Python, C#, Java, JavaScript, Go, Swift, Kotlin, Dart and mobile native layers when the product needs it. ✅ Typical work for me: streaming platforms (including WebRTC at native level), virtual audio/camera drivers and low-level Windows audio stacks, media pipelines on desktop and SBC, networking services, and full products where I own architecture from requirements to shipping. I have my own frameworks and reusable modules, so many parts don't start from zero. Last years I work both as singleton architect/developer and as tech lead in small teams ✅ I start from business intent, then architecture, then code. Module boundaries and interfaces first; implementation after. AI coding tools I use a lot for speed, but only inside a fixed style: DI, TDD, invariant core you can trust. Without that, every new requirement turns into a rewrite. With it, agents write volume and the product stays maintainable ⭐ Domains in more detail: H.264/H.265 pipelines, FFmpeg, NDI, CUDA/AMF/QuickSync/Rockchip VPU, NPU paths; native WebRTC and signaling; KMDF virtual devices; Qt6 desktop/mobile; ESP32/STM32 firmware and USB/UVC. Debugging is a strong side: rare multi-thread and network bugs, kernel and user mode, WinDBG/gdb. Looking for long-term product work where architecture and delivery both matter