Contact information

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Work experience

Senior Full-Stack Engineer

from 09.2018 to now (8 years 3 months)

Senior Ruby on Rails Engineer
Dnipro, Ukraine (GMT+3) | Remote
English: C1 (Advanced) |

Professional Summary
Senior Ruby on Rails Engineer with 10 years of commercial experience building scalable, high-performance web applications and complex backend systems.

Strong expertise in architecture, design patterns, performance optimization, microservices, and mentoring developers. Experienced in leading small teams, conducting code reviews, and delivering high-quality products in fast-paced environments. Worked across Fintech, Hospitality, Healthcare, and Logistics domains.

Tech Stack

Backend
Ruby 3.3+ • Rails 7+ • Sidekiq • Solid Queue • Dry-rb • Sinatra
PostgreSQL • Redis • ClickHouse • Elasticsearch • MongoDB • Kafka • RabbitMQ
REST • JSON:API • OAuth 2.0 • gRPC • GraphQL
RSpec • Docker • Kubernetes • CI/CD

Frontend
Hotwire (Turbo) • React • TypeScript • ViewComponent

Cloud & Tools
AWS • Google Cloud • Heroku • GitHub/GitLab • Jira • Monday.com

Professional Experience

Senior Ruby on Rails Developer
B2B Tax Optimization Platform (Hospitality, UK client)
January 2023 — Present

Leading backend development for a rapidly growing B2B platform serving hotels, cafes and restaurants
Designed and implemented multiple 3rd-party API integrations, significantly expanding product capabilities
Optimized performance by resolving N+1 queries and other bottlenecks
Established Git flow, code review processes and improved development quality
Actively involved in task estimation and technical decision making
Ruby on Rails Developer
Bloomer Health — Healthcare Marketplace (USA)
April 2021 — January 2023

Developed core therapist-patient matching system with complex business rules and verification flows
Designed and maintained scalable database architecture
Conducted regular code reviews and participated in client meetings
Ruby on Rails Developer
Drive — Logistics & Driver Matching Platform
July 2018 — March 2021

Built microservices and advanced search/filtering APIs for driver matching
Implemented complex logic based on multiple parameters (licenses, visas, languages, etc.)
Integrated several external APIs and payment systems
Ruby on Rails Developer
Finance Tracker — Stock Market + Social Platform
October 2016 — December 2018

Built the project from scratch, including social network features and real-time stock data integration
Implemented user roles, multilingual support and notification systems
Languages

English — C1 (Advanced)
German — B1
Russian / Ukrainian — Native

Education

ДНУ

Программирование, программист, Дніпро
Higher, from 2001 to 2006 (5 years)

Knowledge and skills

• MS Office
• PHP
• GitHub
• QA
• Apache HTTP-сервер
• Laravel
• Контекстная Реклама в Интернете
• PostgreSQL
• Управління ІТ-проєктами
• Ruby on Rails
• IT project management
• React
• Node.js
• DigitalOcean
• MS Project
• Jira
• Trello
• Redmine
• Адміністрування ОС Linux
• UNIX
• Адміністрування Ubuntu Server
• Адміністрування Linux Server
• Nginx
• Адміністрування Apache
• Web development
• IT-рекрутинг
• PhpMyAdmin
• PuTTY
• WinSCP
• Ruby
• Docker
• REST
• JavaScript
• AJAX
• HTML
• MySQL
• Git
• Postman
• CSS
• Bootstrap
• Знання принципів MVC
• Користувач ОС Linux
• Здатність до навчання
• Python
• SQL
• JQuery
• Google Optimize
• OpenAI
• Claude API
• Geminy

Language proficiencies

• English — above average
• Ukrainian — fluent

Additional information

Senior Ruby on Rails Engineer
Dnipro, Ukraine (GMT+3) | Remote
English: C1 (Advanced) |

Professional Summary
Senior Ruby on Rails Engineer with 10 years of commercial experience building scalable, high-performance web applications and complex backend systems.

Strong expertise in architecture, design patterns, performance optimization, microservices, and mentoring developers. Experienced in leading small teams, conducting code reviews, and delivering high-quality products in fast-paced environments. Worked across Fintech, Hospitality, Healthcare, and Logistics domains.

Tech Stack

Backend
Ruby 3.3+ • Rails 7+ • Sidekiq • Solid Queue • Dry-rb • Sinatra
PostgreSQL • Redis • ClickHouse • Elasticsearch • MongoDB • Kafka • RabbitMQ
REST • JSON:API • OAuth 2.0 • gRPC • GraphQL
RSpec • Docker • Kubernetes • CI/CD

Frontend
Hotwire (Turbo) • React • TypeScript • ViewComponent

Cloud & Tools
AWS • Google Cloud • Heroku • GitHub/GitLab • Jira • Monday.com

Professional Experience

Senior Ruby on Rails Developer
B2B Tax Optimization Platform (Hospitality, UK client)
January 2023 — Present

Leading backend development for a rapidly growing B2B platform serving hotels, cafes and restaurants
Designed and implemented multiple 3rd-party API integrations, significantly expanding product capabilities
Optimized performance by resolving N+1 queries and other bottlenecks
Established Git flow, code review processes and improved development quality
Actively involved in task estimation and technical decision making
Ruby on Rails Developer
Bloomer Health — Healthcare Marketplace (USA)
April 2021 — January 2023

Developed core therapist-patient matching system with complex business rules and verification flows
Designed and maintained scalable database architecture
Conducted regular code reviews and participated in client meetings
Ruby on Rails Developer
Drive — Logistics & Driver Matching Platform
July 2018 — March 2021

Built microservices and advanced search/filtering APIs for driver matching
Implemented complex logic based on multiple parameters (licenses, visas, languages, etc.)
Integrated several external APIs and payment systems
Ruby on Rails Developer
Finance Tracker — Stock Market + Social Platform
October 2016 — December 2018

Built the project from scratch, including social network features and real-time stock data integration
Implemented user roles, multilingual support and notification systems
Languages

English — C1 (Advanced)
German — B1
Russian / Ukrainian — Native