Experience

Inpay

• Denmark
• Financial Services
• 100 - 200 Employee

• Senior Full Stack Engineer

  • May 2021 - Present



Coupa Software

• United States
• Software Development
• 700 & Above Employee

• Senior Performance Engineer

  • Jan 2014 - May 2020

  Optimize system performance Build and Establish performance engineering tools and framework Scale product performance by optimizing application code, platform and infrastructure Scale product performance to support multi tenant deployments, and very large single tenant deployment in SAAS Establish system performance benchmarks, performance dashboards Proactively identify performance bottlenecks in product pre release and customer environments Implement performance best practices Used technologies: - RoR, Sinatra, Gin-gonic, Gorilla, Iron, GrapeAPI, AWS, Haml/Sass/CofeeScript, JQuery, Webpack, Microservices; - Cucumber & Rspec, Sidekiq, ElasticSearch, Redis, Capistrano, Git; - Monit; - RoR 3-5; - MySQL, Cassandra, Sphinx, Redis, RabbitMQ, AWS, Chef, Git, God; - Implement performance best practices; - AWS (EC2 for single instance, Lamba for croned tasks, AWS Push Notification Service, Route 53 for setting DNS records, S3 for backup and assets, Elastic IPs, SES for mailer, SQS for service messaging, IAM for identity and access management, Elastic Beanstalk with autoscaling); Show less



Herokey GmbH

• Germany
• Software Development
• 1 - 100 Employee

• Senior Software Engineer

  • May 2017 - Aug 2018

  Development tickets management system. Used technologies: - RoR4-5, AWS, Sidekiq, Heroku, Google Cloud Services; - Haml/Sass/CofeeScript, JQuery, AngularJS, VueJS; - Cucumber & Rspec & Capybara; - PostgreSQL; - ElasticSearch & PostgreSQL search, Redis, Mina, Git, Monit, God; - Optimize system performance; - Memory leaks detection and fixies, speedUp and full refactoring applications; - Implement performance best practices. Development tickets management system. Used technologies: - RoR4-5, AWS, Sidekiq, Heroku, Google Cloud Services; - Haml/Sass/CofeeScript, JQuery, AngularJS, VueJS; - Cucumber & Rspec & Capybara; - PostgreSQL; - ElasticSearch & PostgreSQL search, Redis, Mina, Git, Monit, God; - Optimize system performance; - Memory leaks detection and fixies, speedUp and full refactoring applications; - Implement performance best practices.



WiseWeb

• Kiev Region, Ukraine

• Senior Software Engineer

  • Aug 2015 - Sep 2017

  Development web-apps and utilities on Rust, Ruby, jRuby Used technologies: - RoR, Sinatra, Gin-gonic, Gorilla, Iron, GrapeAPI, Heroku, AWS, Haml/Sass/CofeeScript, JQuery, Webpack, Microservices; - Cucumber & Rspec, PostgreSQL, Sidekiq, ElasticSearch, Redis, Capistrano, Git; - Monit; - RoR 3-5; - MySQL, Cassandra, Sphinx, Redis, RabbitMQ, AWS, Chef, Git, God; - Implement performance best practices; - AWS (EC2 for single instance, Lamba for croned tasks, AWS Push Notification Service, Route 53 for setting DNS records, S3 for backup and assets, Elastic IPs, SES for mailer, SQS for service messaging, IAM for identity and access management, Elastic Beanstalk with autoscaling); - Optimize system performance; - Memory leaks detection and fixies, speedUp and full refactoring applications; Show less



SalesDoubler

• Ukraine
• Advertising Services
• 1 - 100 Employee

• Senior Software Engineer

  • Sep 2014 - Dec 2015

  Development web-apps and utilities on Go, Rust, Ruby, jRuby Used technologies: - RoR, Sinatra, GrapeAPI, Heroku, AWS, Haml/Sass/CofeeScript, JQuery; - Cucumber & Rspec, PostgreSQL, Sidekiq, ElasticSearch, Redis, Capistrano, Git; - Monit; - RoR 3-5; - MySQL, Cassandra, Sphinx, Redis, AWS, Chef, Git, God; - Implement performance best practices - AWS (EC2 for single instance, Lamba for croned tasks, AWS Push Notification Service, Route 53 for setting DNS records, S3 for backup and assets, Elastic IPs, SES for mailer, SQS for service messaging, IAM for identity and access management, Elastic Beanstalk with autoscaling). Show less



CommPeak

• Hong Kong
• Telecommunications
• 1 - 100 Employee

• Full Stack Engineer

  • Mar 2014 - Apr 2015

  Development web-apps and utilities on Rust, Ruby, jRuby Used technologies: - RoR, Sinatra, GrapeAPI, AWS, Haml/Sass/CofeeScript, JQuery, Microservices; - Cucumber & Rspec, MySQL, Sidekiq, ElasticSearch, Redis, Capistrano, Git; - Monit; - RoR 3; - MySQL, Sphinx, Redis, RabbitMQ, AWS, Chef, Git, God; - Implement performance best practices; - Optimize system performance; - Memory leaks detection and fixies, speedUp and full refactoring applications; Development web-apps and utilities on Rust, Ruby, jRuby Used technologies: - RoR, Sinatra, GrapeAPI, AWS, Haml/Sass/CofeeScript, JQuery, Microservices; - Cucumber & Rspec, MySQL, Sidekiq, ElasticSearch, Redis, Capistrano, Git; - Monit; - RoR 3; - MySQL, Sphinx, Redis, RabbitMQ, AWS, Chef, Git, God; - Implement performance best practices; - Optimize system performance; - Memory leaks detection and fixies, speedUp and full refactoring applications;



shappe

• Germany
• Technology, Information and Internet

• CTO

  • Sep 2013 - Mar 2014

• Team Lead Manager

  • Jul 2012 - Sep 2013

  Development online medicine appointment systemDuties:- Build development team;- Duties management;- Creation build processes with Agile, Scrum;- Development web-application from a scratch (architecture);- Development test infrastructure;Used technologies:- Rails 3;- Haml/Sass/CofeeScript, Cucumber & Rspec, MySQL, MongoDB, sidekiq, Redis, Capistrano, Git, Monit;- Development an support production environments (dedicated servers).



The English Home Company

• Retail
• 1 - 100 Employee

• Senior Web Programmer

  • May 2013 - Jan 2014

  Creating web-application, hosting deployment, testing, online payment systems implementation. Creating web-application, hosting deployment, testing, online payment systems implementation.



Ooma, Inc.

• United States
• Telecommunications
• 300 - 400 Employee

• Full Stack Engineer

  • Apr 2013 - Jan 2014

  Development and support communication managment system Used technologies: - Ruby, RoR3, Sinatra, GrapeAPI, AWS, Haml/Sass/CofeeScript, JQuery; - Cucumber & Rspec, PostgreSQL, Sidekiq, ElasticSearch, Redis, Capistrano, Perforce; - Monit. Development and support communication managment system Used technologies: - Ruby, RoR3, Sinatra, GrapeAPI, AWS, Haml/Sass/CofeeScript, JQuery; - Cucumber & Rspec, PostgreSQL, Sidekiq, ElasticSearch, Redis, Capistrano, Perforce; - Monit.



Cargo-Boss

• Moscow, Russian Federation

• Middle Software Engineer

  • Jan 2011 - Sep 2013

  Development an online freight auction Development online auction web-app with using ROR framework (2 and 3 versions). Used technologies: - Rails 2-3; - Erb/Sass/CofeeScript, Cucumber & Rspec, MySQL, MongoDB, resque-scheduler, Redis, Capistrano, Git, Monit; - Creating and servicing environment on Centos for developed app. Development an online freight auction Development online auction web-app with using ROR framework (2 and 3 versions). Used technologies: - Rails 2-3; - Erb/Sass/CofeeScript, Cucumber & Rspec, MySQL, MongoDB, resque-scheduler, Redis, Capistrano, Git, Monit; - Creating and servicing environment on Centos for developed app.



Freelance

• Middle Software Engineer

  • Jan 2010 - Jan 2013

• Junior Software Engineer

  • Jan 2005 - Jan 2010

  Creating small web-applications, unix systems (live-streaming video, statistics collector, etc.), technical support hosting of unix based applications.



Ciklum

• Middle Software Engineer

  • Mar 2010 - Sep 2010

  Creating RoR - project. Creating RoR - project.