Sergii Khomenko

Lead Software Engineer · Odesa, Ukraine

Web development since 2006, Ruby on Rails since 2009. Most of my work is on data-heavy backends: billing at Shopify, loyalty at PAR, HR compliance at PeopleForce.

GitHub LinkedIn hello@xoma.me

Work

  1. 2024–now
    PeopleForce, Lead Software Engineer

    Tech lead for HR products Performance, Pulse and Kadry.

  2. 2023–2024
    Svitla Systems, Senior Software Engineer

    Rails upgrades, partitioning and SQL tuning for PAR Punchh.

  3. 2018–2022
    Shopify, Software Engineer

    Moved terabytes of billing data to Vitess sharding.

  4. 2013–2018
    Provectus, Ruby Tech Lead

    Led backend teams at Figure Eight and ThreadSuite.

  5. 2006–2013
    PHP and Ruby on Rails developer in Odesa.

Projects

  1. Ruby gem
    llm_cost_tracker

    Rails gem that tracks LLM costs by tag and enforces budgets.

  2. Confluence app
    Legilio

    Confluence app for OpenAPI docs with Swagger UI or Redoc.

Also

Education
Master's degree in Computer Systems and Networking

Odesa I. I. Mechnikov National University, 2008

Languages
English, Ukrainian, Russian