* Leading development team of 100+ devs/qa/managers.* Led transformation of infrastructure to IaC approach. Migrated from dozens of scripts to Ansible playbooks and Terraform configs. Significantly sped up introducing of infrastructure changes and diminished errors rate* Redesigned development team structure from project teams to feature teams, to be more agile and be able to quickly respond to business directions changing

* Designed and launched a service to manage hundreds of internal services' domains, networks and - visualize relationships between them* Rebuilt internal ERP system while maintaining old version working with migrating functionality to the new system* Created PHP department in the company, 3 full self-contained teamsHired and mentored more than 20 developers

* Built backend for inouse CRM system with realtime chat that holds hundreds simultaneous connections* Created analytical reports system for chat operators* Redesigned a service for routing user traffic between resources to be able to easy create, visualize and follow complex rulesUsed technologies: Ruby on Rails, RSpec, PostgreSQL, Redis, RabbitMQ, ReactJS

Worked on the high load dating website with more than 50 million registered users and about 1 million daily active users (https://fotostrana.ru).* Successfully led the team of developers: product timing, code reviews, mentoring.* Developed multiplayer game and related social mechanics.* Developed internal tools: mass mailing engine for notifications, event scheduling engine, statistics for notifications, admin panel to manage promo actions for users, etc.* Developed seasonal promotions, monetization mechanics and A/B tests.* Maintained and improved existing services.* Wrote technical documentation before new services developed.Used Technologies: PHP, Memcached, Redis, Daemons, MySQL, Sphinx, MongoDB, RabbitMQ, PHPUnit, Selenium, Nginx, Apache, Git, Gitlab, Redmine