- Implemented calendar as the main tool for mass management of various group events- Implemented constructor of template variables- Implemented constructor of system triggers, for multi way user notification, with runtime context and configurable templates of emails, pushes and system events- Implemented email sync mechanism via imap- Participated in transformation of the administrative part to the GraphQL- Refactor numerous services of the app with dry-validationand many more.

- Manage small developers team- Migration two servers from heroku to vps- Implemented postgres backups jobs with WAL logs and dumps- Config vps for staging- Cooperate with outsourced devOps for implementation of new cluster infrustructure based on docker- Implemented Rspec and TDD- Implemented CI & CD- Refactor core of applications for better extandability and addition of new products- Implemented cross PR review- Implemented Code Freeze, bugfixing, git flow- Introduced ReactJs/Redux- Implemented AWS Lamda for resizing images on the flyRuby on Rails, Postgresql, ReactJs + redux, Backbone.

- Manage team, 1 frontend, 2 backend- Planning month goals and splitting them into sprints with product manager- Implemented Rspec and TDD, raised test count from 0 to 1500, coverage ~ 80%- Implemented CI/CD with Dron- Packing app in docker and deploy with docker- Full refactoring of Payment System- Refactoring user model- Implemented cross PR review- Implemented Code Freeze, bugfixing, git flow- Implemented RabbitMQ instead queue based on Sidekiq- Developed 2 microservices in addition to main app- Developed new app with ReactJS, RoR, Docker for administration puproses- Developed alpha version of WebRTC server, with Phoenix/Elixirand many, many more

Appodeal receives offers from ad networks & RTB exchanges and compares them in real time. Automatic blacklisting, looking up optimal ad networks, tracking user behavior (interests, demographics, machine learning).

Universal internet platform for supporting enterpreneurs.Responsibilities: - divide large service on creation of bank accounts and the creation of remittances into two; - configure asynchronous communication between services by Rabbitmq;- configure ElasticSearch (gem Chewy) to give data on query.- refactoring;- test coverage about 95%.Build new features:- issue a credit card tied to a personal bank account;- opening a deposit entity or individual contribution;

Investing platform, backend.Responsibilities: ‒ development of an investment platform from scratch; ‒ database design; ‒ TDD (RSpec); ‒ compliance with the code style rubocop; ‒ continues integration; ‒ deploying with Capistrano; ‒ interaction with API (Vanare.com, Plaid.com);Scrum methodology, planning poker, task tracker Jira.

Develop internet shops, delivery service with spree commercial.‒ development of commercial projects using Spree. ‒ the development of custom solutions for the Spree. Task tracker Redmine.

My responsibilities include rebuild order form with ruby and angular, create service for interacting with accounting program, create personal cabinet with order history and contact book. Develop e-commerce internet store. Logistic app, develop and support.