Alex

Web developer since 1998. He had met Ruby 12 years later while using Sinatra and Ruby on Rails. Madcap for algorithms. Linux administrator and Open Source ideology evangelist. In free time he explores the secrets of machine learning.

It seems that perfection is attained not when there is nothing more to add, but when there is nothing more to remove.

Antoine de Saint Exupéry

Skills

Backend &Frontend Development Deployment Teamwork Leadership Refactoring TDD Agile Team Building Linux Server Administration Remote Work Product Development

Projects

GOBL

GOBL
Global JSON Invoicing Standard

An open standard initiative for interoperable JSON invoicing across regulatory ecosystems.

Major contributions

  • XRechnung validation support in CI

Project Koch (NDA)

Project Koch (NDA)
global e-commerce platform

A large-scale commerce platform with distributed services and customer-facing workflows. Reliability and interoperability were essential to daily operations.

Major contributions

  • Architecture design and service hardening

Project Julia (NDA)

Project Julia (NDA)
digital education platform

A global learning platform serving millions of learners and thousands of courses. The system supports multiple partner types and course formats.

Major contributions

  • Ruby on Rails delivery across partner-facing modules
  • Flaky tests reduction

Hitdea

A logistics-focused platform with distributed services and custom operational modules.

Major contributions

  • SOA design and development
  • Deployment and workflow automation

SelectHub

A platform helping organizations evaluate and select software solutions.

Major contributions

  • Ruby/Rails upgrades and data migration support


See more technology which I know

Backend development


  • Ruby
  • Ruby on Rails
  • Sinatra
  • Jekyll
  • JRuby
  • TruffleRuby
  • Go

Databases


  • PostgreSQL
  • MySQL
  • SQLite
  • Redis

Frontend development


  • JavaScript
  • TypeScript
  • React
  • Next.js
  • CoffeeScript
  • ®Ember.js
  • Backbone.js
  • Marionette.js

Web technologies


  • Less
  • Sass
  • HTML Abstraction Markup Language
  • Slim Template Language
  • Scalable Vector Graphics
  • HTML5
  • CSS3
  • BootstrapBootstrap
  • Foundation Framework
  • Markdown

Testing


  • RSpec
  • minitest
  • Playwright
  • Selenium WebDriver
  • Selenium IDE
  • Shoulda Matchers
  • Cuprite - Headless Chrome driver for Capybara
  • Ferrum - high-level API to control Chrome in Ruby

Tools


  • Git
  • GitHub
  • Sidekiq
  • docker
  • Terraform

Search engine


  • Elasticsearch
  • Apache Solr
  • OpenSearch

Operating systems


  • GNU/Linux
  • Ubuntu
  • debian
  • Linux Mint
  • openSUSE
  • SSSSSlackware
  • Slax
  • Alpine

Cloud Computing


  • Heroku
  • DigitalOcean
  • Amazon Web Services
  • Google Cloud
  • Fly.io

Mathematical software


  • MATLAB

Project management software


  • Trello
  • Taiga

Linters &code formatters


  • RuboCop
  • ESLint
  • Prettier
  • Stylelint

CI (Continuous Integration)


  • GitHub Actions
  • Jenkins
  • Hound CI
  • Travis CI