Leonid G.

What I can do for you: - Backend and APIs: Django, DRF, Celery, PostgreSQL, Redis, Docker; real-time features over WebSocket. - Hardware and devices: SDR (HackRF, bladeRF), Bluetooth Low Energy, Raspberry Pi; Python wrappers for C libraries. - Real-time data: signal processing, streaming pipelines, live charts. - Faster Python: profiling, Cython, moving heavy work out of the GIL. - Desktop and Android apps: PySide / Qt, Kivy, Android builds of native libraries. Recent work: - A spectrum-monitoring platform for Windows, macOS, Linux and Android: SDR drivers, signal detection, a server with secure device connections and a web dashboard. - A real-time ECG viewer for a custom two-channel medical scanner. - Performance optimization of a PySide6/QML application. - Open-source libraries python_hackrf and python_bladerf, published on PyPI. How I work: - I ask questions first, then send a short plan with an estimate before writing code. - You get regular progress updates and working builds, not just a final delivery. - Clean, documented code that another developer can pick up. - Based in Belgrade (CET): full overlap with Europe, mornings with the US East Coast. Send me a short description of your project, and I will reply with questions and a plan.