Ivan B.

I deliver high-performance solutions across different domains - from desktop applications and video processing to backend systems and telecom integrations. Recent wins: - Production billing system in pure C with GraphQL/AWS integrations — 3+ years in production - Built coordinate transformation system meeting government geodetic standards (C++/C#) - Full-stack call center monitoring system (C++17 + Angular, ~300 calls/day) - Speech-to-Text integration for call centers (Asterisk, Deepgram) - 30% memory reduction in production video player (VLC to FFmpeg optimization) - 5x faster document processing (IBM Doors module) Full technical stack: Languages: C++ (11/14/17), C, C#/.NET, Python Windows/Desktop: MFC, WinAPI, COM, GDI, Qt, multithreading VOIP/Telecom: Asterisk, dialplans, AEAP, FreePBX, OpenSIPS, SIP Web & Databases: Angular, Node.js, MariaDB, PostgreSQL/PostGIS, MS SQL Server Video/Media: FFmpeg, H.264, MP4v2, video pipeline optimization Build & Tools: CMake, Make, Ninja, WiX, NSIS, Docker, Terraform, Git, Valgrind, gdb, cppcheck, Grafana, Claude Code OS: Windows (7, 10, 11), Linux (CentOS, Ubuntu, Debian, Raspbian) Detail-oriented - I read existing code carefully, before touching it and prefer conservative, targeted fixes over rewrites. Comfortable debugging complex legacy codebases.