Sr. C++ Developer (DirectX)

Aristeem  is  looking for a highly skilled Senior C++ Developer experienced in Windows graphics capture and real-time video processing. You will design, optimize, and maintain high-performance capture modules for screen and video pipelines, working closely with GPU APIs, hardware encoders, and complex multi-threaded systems.

Tech Stack

C++17/20, WinAPI, COM, DirectX 11/12, DXGI, WGC, D3D11on12, NVENC, AMF, QSV, Media Foundation, FFmpeg, ETW, PIX, RenderDoc, CMake, MSVC.

Responsibilities

• Develop and optimize image capture modules using DXGI Desktop Duplication API, Windows Graphics Capture, and fallback methods via GDI/DWM.
• Work with DirectX 11/12, shared textures, GPU–CPU synchronization, and zero-copy frame transfers.
• Implement cursor capture, HDR→SDR conversion, scaling, and color correction.
• Integrate with hardware encoders (NVENC, AMF, QSV) and media pipelines (Media Foundation, FFmpeg).
• Support multi-monitor setups, HiDPI, and virtual displays (IDD).
• Ensure optimal performance (≥120 FPS at 4K), resolving bottlenecks and thread race conditions.
• Develop internal SDK interfaces and logging tools (ETW/WPA).
• Participate in architectural discussions and code reviews.

Requirements

• 6+ years of professional experience in C++17/20 development.
• Deep understanding of WinAPI and COM.
• Proven experience with DirectX 11/12, DXGI, IDXGIOutputDuplication, and Windows Graphics Capture (WGC).
• Strong knowledge of multithreading, atomic operations, and GPU/CPU synchronization.
• Experience with Media Foundation, FFmpeg, or hardware video encoders (NVENC/AMF/QSV).
• Proficiency in profiling and debugging tools (ETW, PIX, RenderDoc, WPA).
• Understanding of WDDM, DWM, and Flip Model.
• Ability to write clean, efficient, and leak-free multi-threaded code.

Nice to Have

• Experience developing virtual displays or Indirect Display Drivers (IDD).
• Familiarity with zero-copy frame sharing (D3D shared handles, keyed mutex).
• SIMD optimization (SSE/AVX) for color space and format conversions (e.g., RGBA↔NV12, I420).
• Knowledge of OBS / obs-studio architecture or plugin development.
• Experience with streaming systems (WebRTC, RTSP, RTMP, HLS).
• Understanding of H.264/H.265 codecs, bitrates, and latency presets.

Personal Qualities

• Strong systems thinking and attention to low-level details.
• Commitment to quality, performance, and stability.
• Ability to justify technical decisions and collaborate effectively in a te

We offer

• Competitive Salary
• 15 paid vacation days and 7 sick leaves
• Rezervation if needed
• Blackouts equipped office (heating and electricity)