Matvey Shmarenkov

Experience

1. 12.2025 — 08.2026

   Backend Developer

   EnergyTime

   International IT services integrator since 2011: cloud migration, infrastructure, cybersecurity, digital workplace. Self-employed contract. The product — DynamicComfy, a multi-tenant platform for accessing ComfyUI on a shared GPU server. I owned the backend, the control panel and the infrastructure.

   • ◆Built the platform from scratch, giving the team parallel isolated work on a single GPU server.
   • ◆Implemented per-user Docker container orchestration through the Docker SDK — startup, reuse, bind mounts, TTL cleanup — cutting environment provisioning to about 10 seconds with no administrator involved.
   • ◆Moved the model library into shared read-only storage, saving terabytes of disk on duplicate weights while keeping working directories and output isolated.
   • ◆Built an HTTP/WebSocket reverse proxy with JWT authorisation and roles, putting the GPU server behind a single entry point instead of exposed container ports.
   • ◆Added a tool-calling chat assistant and a separate MCP server, allowing txt2image and image-to-video runs from natural language and connections from external AI agents.
   • ◆Deployed local LLMs (Qwen2.5-32B, Llama) on an NVIDIA A100 via vLLM/llama.cpp and OpenWebUI, giving the team in-perimeter model access without external APIs.
   Python 3.11FastAPIasync SQLAlchemy 2.0PostgreSQL 16Docker SDKDocker ComposevLLMOpenWebUICUDAReactTypeScriptpytest
2. 03.2025 — 05.2026

   Fullstack Developer · part-time

   Freelance — Shum CRM

   Attendance tracking for a network of children’s theatre studios. Sole developer: backend, Telegram bot, integrations, infrastructure.

   • ◆Designed and shipped an attendance CRM, moving ~1000 students from hand-filled spreadsheets to check-in through a Telegram bot.
   • ◆Built a FastAPI REST service — ~20 endpoints, layered architecture, 6 PostgreSQL tables — as the single source of data for the bot, reports and sync.
   • ◆Implemented two-way Google Sheets sync validated against the ORM schema, keeping teachers on familiar spreadsheets while removing drift from the database.
   • ◆Automated student-by-date reports with HTML rendering and Excel export, cutting period summaries down to a single action.
   • ◆Launched and maintained the system in production for a year; its backend became the base for the next AI-agent version of the product.
   PythonFastAPIPostgreSQLSQLAlchemyAiogramGoogle Sheets APIpandasDocker Compose
3. 2025

   Backend and IoT · team of two

   LocKey — Samsung Innovation Campus, RTU MIREA

   Room access control through a smart lock. First place at the project defence. I owned the backend, the IoT module and part of the Kotlin mobile app.

   • ◆Built the MVP: a FastAPI backend drives ESP32 locks over a persistent WebSocket, with doors opened from the mobile app against a booking code from an external CRM.
   • ◆Designed two-layer access verification — an HMAC-SHA256 booking signature plus a TOTP-style lock code with ±1 step tolerance — ruling out forgery and code reuse without storing bookings in the database.
   • ◆Wrote ESP32 firmware with a fail-open mode so a backend outage cannot trap people inside; covered every access scenario with pytest.
   Python 3.12FastAPIWebSocketsasync SQLAlchemyPostgreSQLpytestESP32 (C++/Arduino)Kotlin