Alex M.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

Full-stack developer with over 10 years of experience, familiar with Gitlab and Jenkins. I understand a lot of how Stripe works. I'm a core contributor of "stripe-ruby-mock" gem - open source project. Have an experience with Shopify integration: login via Shopify, scopes, processing webhooks, other API actions. My github username is alexmamonchik. Have a great experience with building API. Prefer to use Grape framework + ActiveRecord. But Rails API is also fine. Core competencies: Back-end development: Ruby(Ruby on Rails, Grape, Sinatra), In past - PHP (CakePHP, CodeIgniter); Database development: MySQL, PostgreSQL, MongoDB; Front-end development: HTML5, CSS3, HAML, ERB, CoffeeScript, RABL; JavaScript: jQuery, Angular JS, Vue JS ;