Responsibilities & achievements

● Integrate new payment systems, solution for parsing web pages with captchas, A/B testing. ● Implement rollback DB migrations on CI servers viaAnsible, Puppet, and Makefile. ● Take part in the investigation and development of workers analytic system and workers analyticsystemand workers locking system. ● Design exception handling for GraphQL API. ● Improve developer experience: upgrade rails from 5to 6 version, upgrade rubocop from 0.49 to0.81, introduce left hook to auto-check robocop, create bash tool to ease access all service from the host machine to vagrant, switch working with translation in development to Crowding branches.

Responsibilities & achievements

● Switch endpoints from RestAPI to GraphQL. ● Switch frontend part from Stimulus to React. ● Code refactoring (switching to more clear architecture with Commands, FormObjects, Services, Page Objects patterns). ● Cover all written code via tests using only a TDDapproach. ● Configure Semaphore CI, Percy and Heroku.

Responsibilities & achievements

● Responsible for initial project setup, architecture design, implementations and most features. ● Mentor colleagues, reviewing patches. ● Configure AWS: creating subdomains for every account via route 53 API, configuring s3 bucket,cloud front, ec2 instances, creating BASH scripts for CD server.

Responsibilities & achievements

● Design and develop new features, data fixes, performing unit and integration testing. ● Tune SQL queries, especially related to HierarchicalQueries. ● Delivering System Build via git.