In more then 13 years of his practical experience as a Ruby Software Engineer Oleksii participated in the development of many various projects covering different business domain areas. Among them are: app builder application (like WIX, widgets admin and client apps/APIs), video processing (events recreation, multi source view, made elaborated video processing conveyor), tools and goods renting/lending app (booking logic, payments), social networks (social network for bars/cocktails + payments + bartender app), reverse logistics, geolocational online game (worked with geo lat lon database extensions Postgis) and healthcare.

No matter whether Oleksii works with small single server application or complex multi-service architecture he always can find place for creative approach and engineering spirit bringing to life well elaborated and resilient software solutions.

Ruby. Also familiar a bit with Javascript/jQuery, Golang, Elixir, HTML/CSS

Ruby on Rails, Active Admin, Trailblazer Operation, dry-rb Validations

Postgres, Redis, a bit of MongoDB (courses only)

Paypal API, Stripe API, Paya.

Mostly REST, a bit of: gRPC, GraphQL

rSwag, rSpec, timecop, ffaker, Factory Bot, webmock

Cerner, Athenahealth, NextGen Healthcare, CharmHealth, DoseSpot, Dendi LIS, Tenovi

AWS

ImageMagick, ffmpeg

Upper-intermediate

Dnipro National University of Railway Transport

Master degree in Computer Science, IT systems engineer at Information Security

2006 - 2011

Linkedin

Stackoverflow

Github Pages

• Caelus is a weather monitoring app. Main feature of this app is periodic collection of current weather data from the weather APIs and physical weather monitoring devices which should send their current weather data to the application backend periodically too. Later on at admin panel this data can be observed, analysed and processed for example for some weather research purposes.
• Transportation Task Solution Backend API for transportation task solution. Home task of the Golang Course.
• BallGame JavaScript Game In Canvas with ES6 Classes and Modules. With some physics. And WebAudio sounds.
• Api Sketch ruby gem. It provides DSL to describe and create API documentation; consists of three main parts: API definitions DSL, documentation generator, API example responses server.
• Video Processor Simple Video Processor Server Api. Currently it supports only one operation video trimming.

• Programming
• DevOps
• AI, ML, BigData
• Guitars
• Running
• Snowboarding
• Swimming
• Space
• Science