spi4ka@gorbunovalexey.ru ~ $

Alexey Gorbunov

Senior Backend Engineer / Tech Lead | Go, Python

📄 Download CV in PDF

🎯 About me

Backend engineer with 13+ years of experience. Currently leading backend development on Timeweb Cloud’s corporate mail platform — Go services distributed across 30+ mail spoolers, with AI features built on OpenAI and YandexGPT. Previously tech lead of a 10-engineer team on a multi-tenant website builder serving 281,000 sites, where I rebuilt the publishing pipeline in Go around incremental rebuilds and cut the fleet from 6 instances to 2. Earlier: payment processing, order handling and market-data ingestion for a trading platform. 10+ years on products for international markets (Finland, Canada); working language English.

💼 Experience

Timeweb Cloud — Senior Backend Engineer / Tech Lead

August 2025 — present

Leading backend development (5 engineers, 2 QA engineers) on corporate mail for Timeweb Cloud and Timeweb Hosting — mail hosting on customer domains for B2B and B2C, plus a whitelabel tier where the customer runs the product fully under their own domain, logo and naming.

  • Took ownership of a three-year-old codebase; stabilized it and resumed feature delivery
  • Moved cross-service communication from REST to gRPC; built out the services needed to reach feature parity with market alternatives — whitelabel proxy agent, mail collector, a new spam-filter service, LDAP and app-password services
  • Refactored the distributed mail pipeline across 30+ spoolers: Dovecot → inotify watcher → RabbitMQ → agent → storage, with the API reading over gRPC
  • Refactored the event-driven core onto a 3-node RabbitMQ cluster with quorum queues: ~1,500 queues, ~1,500 consumers and ~150 messages/s sustained (10M+ per day)
  • Developed AI features: RAG assistant for customer support, email processing, subject-line generation, translation and rephrasing, LLM-assisted antispam layered on rspamd, and MCP integration
  • Built the LLM layer: OpenAI + YandexGPT with automatic failover, per-user model routing, rate limiting, retries and cost alerting
  • Security: authentication, CORS/CSP/XSS hardening, remediation of bug-bounty findings

Stack: Go · gRPC · RabbitMQ · LLM · RAG · MCP · Observability

Craftum (Timeweb Cloud) — Team Lead / Tech Lead

May 2021 — August 2025

Tech lead of a team of 10 on a multi-tenant website builder: 281,000 sites on the platform, 140,000 paid and live.

  • Rebuilt the site publishing pipeline in Go as a RabbitMQ consumer with incremental rebuilds — only pages modified since the previous publish are regenerated. Cut the fleet from 6 instances/24 workers to 2/10
  • Expanded the publishing feature from a simple “Publish one page” into “Publish whole site”, “Publish diffs”, “Publish collection” and “Publish collection items”; one collection change can cascade into a rebuild of 10,000+ pages
  • Shipped AI features: text generation, image search and generation, translation, and an AI page builder that generated native Craftum blocks from a prompt — constrained generation into the product’s own block schema
  • Initiated and led the split of a Flask monolith into 15 FastAPI microservices — core migration in ~3 months by 2 engineers, then extended by the growing team through new services rather than rewrites
  • Introduced CI/CD from scratch.
  • Owned the e-commerce module, the collections system and international expansion

Stack: FastAPI · Go · Python · PostgreSQL · Microservices · RabbitMQ · CI/CD · Team management

KAD Division — Python Senior Developer

May 2021 — December 2021 · part-time, parallel to the Timeweb Cloud/Craftum role

Trading platform: acted as the payment provider for the client, extending an existing payment service; built order processing and settlement for binary options. Market data ingestion from Polygon. SaaS platform honkio.fi: server architecture on Flask and PyMongo, React.js integration.

Stack: Flask · PyMongo · React.js · Payments · Market data

Self-employed — Senior Developer / Tech Lead

October 2019 — April 2021

Led development and launch of large web and mobile projects from scratch: architecture, technology choices, team organization and hiring.

  • automarketby.ru — a car marketplace. Microservices architecture (FastAPI, Golang), Nuxt.js frontend
  • coffee-star.ru — an API for a vending-machine network’s mobile apps, with integration to Chinese servers for automated order fulfillment (FastAPI, Golang)
  • trans-tech.ru — a document-management system for translators and clients, including military organizations, with customization and partial-component installation (FastAPI, MongoDB, PostgreSQL, Vue.js)
  • stroykapp.ru — a CRM for document management in construction government procurement (Django, PostgreSQL, MongoDB, Nuxt.js)

Stack: FastAPI · Golang · Django · Nuxt.js · Vue.js · PostgreSQL · MongoDB

Earlier experience

  • SoCall (Senior Programmer, 2017–2019) — internal ERP for a call-centre, web-phone over Asterisk/Vicidial, bizon365/chat2desk integrations
  • SoftDev (Senior Programmer, 2016–2017) — backend/frontend for Finnish startups on the honkio API (happs.fi, enfo.fi, workpilots.fi and others)
  • ETVnet (Middle Programmer, 2015–2016) — Canadian streaming platform, backend for afisharu.com, kodi.tv add-on
  • Tensor (Middle Programmer, 2013–2015) — big-data import/export, analytics dashboards

🛠 Technology

Backend

  • Languages: Go (Golang), Python
  • Frameworks: Gin, Django, Flask, FastAPI
  • Databases: PostgreSQL, MySQL, MongoDB, Redis
  • Queues: RabbitMQ, NATS
  • APIs: gRPC

AI / ML

  • LLM APIs, RAG, MCP

DevOps / Infrastructure

  • Docker, Docker Swarm, Kubernetes
  • CI/CD, Nginx, Observability
  • Linux

Other

  • Team management, mentoring
  • Microservices architecture

📫 Contact

🌍 Languages

  • Russian — native
  • English — B2 (Upper-Intermediate)

Open to interesting remote or consulting opportunities.