Leonid Dolgirev

[email protected] Telegram LinkedIn GitHub Portfolio Moscow

Backend Engineer | Python, Kafka, ClickHouse | High-Load APIs | ML/LLM Infrastructure & AI Agents | 5+ Years

Experience

Center for Research in Big Data Systems and Information Technologies

Jul 2026 – Present

Moscow | IT department — ML/LLM infrastructure

Software Engineer

  • Ship AI-agent features in production: internal BPM platform for task management (used by humans and AI agents), MCP (Model Context Protocol) integration, AI-assisted test/code-review pipelines
  • Built the company's engineering infrastructure from scratch: GitLab with GitLab Runner, CI/CD pipelines, and deployment of internal services

Stack: Python, FastAPI, Docker, GitLab CI/CD, Nginx, PostgreSQL, vLLM

EdgeCenter (ex-Gcore)

Apr 2025 – Jun 2026

Moscow | cloud / OpenStack platform

Python Engineer

  • Stream OpenStack telemetry (Neutron, Trove, Nova, Octavia) through Kafka into ClickHouse at ~10,000 events per 30 seconds
  • Cut Tornado API error rates with a failure-intercept module that returns correct responses
  • Fixed Ceph volume deletion timeouts for large storages (10+ TB) in the Go management API
  • Added AI-assisted test and code-review pipelines to the existing suite
  • Own platform on-call (Sentry, Prometheus), handling 7–10 incidents per week

Stack: Python Tornado, Go, PostgreSQL, ClickHouse, MariaDB, OpenStack, Kafka, Docker

CDNvideo (Beeline)

May 2021 – Apr 2025

Moscow | CDN / streaming data platform

Middle Python Developer

Oct 2022 – Apr 2025
  • Built ClickHouse data-integrity monitoring that detects duplicates at up to 1,000,000 rows/s ingest
  • Shipped an event-driven metrics platform (Kafka, Vector, PostgreSQL, Aiohttp) for core service KPIs
  • Accelerated the authorization service (Tornado, PostgreSQL) by 30% and reduced peak-load errors
  • Integrated MobileID 2FA on Django across 8,000+ user accounts
  • Rewrote a legacy module and cut incidents by 25%
  • Mentored two developers to full productivity within one month

Junior Python Developer

May 2021 – Oct 2022

Promoted to Middle within 1.5 years

  • Operated real-time collect → parse → load pipelines into ClickHouse

Stack: Python Aiohttp, Tornado, Django, PostgreSQL, ClickHouse, Redis, Kafka

Skills

Languages: Python, Go, SQL
Technologies: ClickHouse, Kafka, PostgreSQL, Redis, MariaDB, Aiohttp, Tornado, Asyncio, Docker, SQLAlchemy, Pytest, OpenStack, Sentry, Prometheus, Git, REST APIs, AI agents, LLM tooling
AI / LLM: MCP (Model Context Protocol) integration, AI agent orchestration, LLM tooling, AI-assisted development (tests, code review)
Methodologies: Distributed systems, high-load APIs, data pipelines, on-call / observability, AI-assisted development

Education

Volgatech (PSTU)

Sep 2023 – Nov 2027

Bachelor of Science, Intelligent Telecommunication Systems and Networks

Languages

Russian — native; English — professional working proficiency

Additional Information

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