Roman Parashchenko

The company develops custom turnkey software solutions and also provides its technical staff to expand the client's teams. In addition, the company develops its products in the field of education, event organization, and automation of IT company processes. *** Technologies: *** - Ruby 3.x, Rails 7.x, Node - React/Redux, React Native - REST API (JSON:API), JWT Sessions, SSO SAML - Postgres, Redis, Prometheus, Grafana, Loki - Terraform, Terragrunt, AWS, Linode, Helm, Kubernetes, GitHub Actions, Sentry

The company empowers logistics providers with a digital suite (Internal Rate Lookup, External Quote Engine, Booking Shop) to streamline operations, boost sales, and increase profitability. *** Technologies: *** - Ruby 3.x, Ruby on Rails 7.x, Rails Engines, Sidekiq, Angular - Postgres, PostGIS, ElasticSearch, Redis, Memcached, Prometheus, Grafana - Terraform, Terragrunt, AWS, Helm, Kubernetes, Sentry, Fastly, GitHub Actions

A Dutch Central Bank-registered liquidity provider, empowers European institutions to offer digital currency trading to their clients. They act as both a market maker on exchanges and a direct liquidity provider off-exchange, ensuring competitive bid/ask prices for clients. *** Technologies: *** - Ruby 2.x, Rails 6.x, Sidekiq, RabbitMQ, React/Redux - Elixir, OTP, Phoenix LiveView, Kafka - PostgreSQL, Timescale, Prometheus, Grafana - Terraform, AWS, GKE, Helm, GitHub Actions, Cloudflare, Sentry

The largest event and job platform for students and graduates in Switzerland. *** Technologies: *** - Ruby 2.x, Ruby on Rails 5.x, Thin, Sidekiq, oAuth2, REST (JSON:API) - Rails UJS, jQuery, CoffeeScript, React/Redux, Babel, Elm - Postgresql, Redis, ElasticSearch, Airbrake, Scott, CircleCI, GitHub - Heroku, AWS, Kubernetes (GKE)

The company, a leading crowdsourcing platform with over 6 million users globally, provides businesses with cost-effective data solutions like training data for AI, text creation, surveys, and more, in 18 languages. *** Technologies: *** - Ruby 1.9.3, Ruby on Rails 4, Nginx, Backbone.js/Marionette.js - MySQL, MongoDB, RabbitMQ - GitHub, Jenkins

The company provides an online service that allows an event organizer to market, sell, and distribute tickets to an event using SMS text messaging technologies. *** Technologies: *** - SOAP API (Java), Ruby Enterprise Edition, Ruby on Rails 2.3, Passenger, Prototype.js - MySQL, Jira Studio, Jenkins, SVN