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senior
Registration: 24.03.2025

Sergey Kastornov

Specialization: Ruby on Rails Fullstack Engineer
- Ruby on Rails Fullstack Engineer - Strong development experience more than 24 years - Certified Professional Scrum Master - I - Good skills in communication and team work - Deep knowledge of OOD, design patterns and refactoring concepts - Fast adaptation for the new programming languages and technologies - Advanced skill of English
- Ruby on Rails Fullstack Engineer - Strong development experience more than 24 years - Certified Professional Scrum Master - I - Good skills in communication and team work - Deep knowledge of OOD, design patterns and refactoring concepts - Fast adaptation for the new programming languages and technologies - Advanced skill of English

Skills

Ruby on Rails
Javascript
SQL
Ruby
PHP
Node.js
Rails
RSpec
Minitest
React
Vue.js
AngularJS
CoffeeScript
jQuery
Slim
Capybara
Capistrano
Sinatra
HAML
HTML
CSS
Sidekiq
Resque
RabbitMQ
DelayedJob
Backbone
XML
xPath
Google API
CodeIgniter
Windows API
DOM
MFC
WPF
AWS
Heroku
Webrick
Unicorn
Puma
Nginx
Apache
Passenger
Docker
CircleCI
PostgreSQL
Redis
MySQL
MongoDB
Oracle
RubyMine
Visual Studio
Git
Mercurial
SVN
CVS
Jira
RedMine
TTP
TargetProcess
Bugzilla
OOP
Agile Scrum
TDD
BDD
Design Patterns (GoF)
MVC

Work experience

Senior Ruby Fullstack Developer
09.2021 - 12.2024 |DataArt
Ruby on Rails, PostgreSQL, RSpec, Minitest, React, JavaScript, Slim, AWS, Git
Project: Customer car parks booking web application dedicated team ● Communicated with the customers during developing ● Developed architecture solutions ● Developed and supported Ruby on Rails source code using design patterns and test coverage using RSpec and Minitest ● Developed and supported React source code for front-end
Senior Ruby developer, Scrum master
08.2019 - 07.2021 |Hinterview
Ruby on Rails, PostgreSQL, RSpec, Vue.js, Vuetify, Pug, JavaScript, Sidekiq, Git, Heroku
Project: Employee recruitment web application ● Integrated Scrum framework to team processes ● Trained the team in Scrum methodology ● Conduct correspondence with third part components support for their correct work ● Communicated with the customers during developing ● Developed architecture solutions ● Developed and supported Ruby on Rails source code using design patterns and test coverage using RSpec and Minitest ● Developed and supported Vue.js source code for front-end.
Senior Ruby Developer
12.2018 - 07.2019 |Anadea
Ruby on Rails, PostgreSQL, RSpec, JavaScript, Git
Projects: 1. Main company web application 2. Flights booking web application 3. Travel booking web application
Senior Ruby Developer
11.2018 - 12.2018 |OnePoint
Ruby on Rails, PostgreSQL, RSpec, React, JavaScript, Git
Project: Crypto exchange web application
Team Lead / Senior Ruby Developer / Node.js Developer
12.2017 - 10.2018 |SumatoSoft
Ruby on Rails, PostgreSQL, RSpec, React, JavaScript, Git, Node.js, AWS
Project: Companies detailed information web application Environment: Ruby on Rails, PostgreSQL, RSpec, React, JavaScript, Git. ● Acted as a projects team lead ● Discussed current tasks ● Planned project development ● Communicated with the customers during developing ● Developed architecture solutions ● Developed and supported Ruby on Rails source code using design patterns and test coverage using RSpec and Minitest ● Developed and supported React source code for front-end Project: Financial help web application Environment: Node.js, PostgreSQL, AWS, React, JavaScript, Git. ● Acted as a projects team lead ● Discussed current tasks ● Planned project development ● Development of architecture solutions ● Development and support of Node.js source using design patterns
Senior Ruby Developer
08.2017 - 11.2017 |OnTheSpot
Ruby on Rails, MySQL, JavaScript, RSpec, Sidekiq, Opal, Docker, Git
Project: Gyms network web application ● Supported application infrastructure in Docker Cloud ● Communicated with the customers during developing ● Developed architecture solutions ● Developed and supported Ruby on Rails source code using design patterns and test coverage using RSpec and Minitest ● Developed and supported React source code for front-end
Ruby Team Lead / Senior Ruby Developer
05.2016 - 08.2017 |iTexus
Ruby on Rails, PostgreSQL, MySQL, JavaScript, AngularJS, RSpec, Minitest, Capybara, Resque, Git
Projects: 1. Financial consults web application 2. Real estate agency web application 3. Mobile clinic web application 4. Women accessories web application ● Acted as a projects team lead ● Discussed current tasks ● Planned project development ● Coordinated work with other companies which work on projects, managed and trained junior developers ● Communicated with the customers during developing ● Developed architecture solutions ● Developed and supported Ruby on Rails source code using design patterns and test coverage using RSpec and Minitest ● Developed and supported React source code for front-end
Senior Ruby Developer
10.2015 - 02.2016 |CodeSWAT
Ruby on Rails, PostgreSQL, RSpec, JavaScript, CoffeeScript, AngularJS, Slim, Capybara, Resque, Git
Project: Venture investment web application
Senior Ruby Developer
04.2015 - 10.2015 |Pointsource
Ruby on Rails, Sinatra, PostgreSQL, RSpec, JavaScript, CoffeeScript, AngularJS, HAML, Sidekiq, DelayedJob, Git
Project: Recruitment marketing web application
Senior Ruby Developer
01.2015 - 04.2015 |Altoros Development
Ruby on Rails, PostgreSQL, RSpec, JavaScript, JQuery, HAML, Resque, Git
Project: Crypto community web application
Ruby Team Lead / Scrum Master
07.2014 - 01.2015 |Syberry CIS
Ruby on Rails, Sinatra, MongoDB, JavaScript, Backbone, JQuery, HAML, RSpec, Resque, Nginx, Git
Project: Walt Disney company web application in Russia ● Acted as a projects team lead ● Discussed current tasks ● Planned project development ● Communicated with the customers during developing ● Developed architecture solutions ● Developed and supported Ruby on Rails source code using design patterns and test coverage using RSpec and Minitest ● Developed and supported React source code for front-end
Ruby on Rails Developer / Senior PHP Developer
10.2013 - 06.2014 |HipWay
Ruby on Rails, PHP, Zend Framework, PostgreSQL, JavaScript, JQuery, RSpec, Sidekiq, Nginx, Git
Projects: 1. Travel web application 2. Travel club web application ● Acted as Scrum master and coach ● Integrated Scrum framework to team processes ● Trained the team in Scrum methodology ● Conduct correspondence with third part components support for their correct work ● Communicated with the customers during developing ● Developed architecture solutions ● Developed and supported Ruby on Rails source code using design patterns and test coverage using RSpec and Minitest ● Developed and supported Vue.js source code for front-end.
Ruby on Rails Developer
09.2012 - 09.2013 |Anakreon
Ruby on Rails, PostgreSQL, JavaScript, Jquery, RSpec, RabbitMQ, Mercurial
Project: Online education community web application
Project Manager / System architect / senior PHP developer
11.2006 - 08.2012 |Belsource
PHP 5, MySQL, Smarty, JavaScript, JQuery, HTML+CSS, XML, SVN, MS Office
Projects: 1. Coins investment web application 2. Bullions investment web application 3. Wine and spirits shop web application ● Developed specifications ● Conduct correspondence with customers ● Assigned tasks to developers ● Conduct correspondence with site servers support ● Made tasks code review ● Developed architecture solutions ● Developed and supported PHP source code
C++ developer
04.2006 - 11.2006 |UTL
C++, DOM, Windows API, Microsoft Visual Studio
Project: Wi-Fi connection clients for the company “Boingo Wireless” ● Developed Wi-Fi connection client
C++ developer
10.2005 - 04.2006 |UTL/Intellisoft
C++, Windows API, XML, XSLT, Microsoft Visual Studio
Project: Reports from TTP tracking system for the company “UTL”/”Intellisoft” ● Developed XML tree creation for reports data ● Developed XSLT templates for XML reports data representation
.NET and C++ Developer
07.2005 - 08.2005 |Intellisoft
C++, STL, C#, Windows API, ASP.NET, XML, XSLT, SOAP, Microsoft Visual Studio
Project: Online Surveys System for the company “OTF Group” ● Developed server part improvements for surveys representation and functionality ● Developed client part improvements for surveys creation ● Developed surveys import from the client to the MS Word
C++ and .NET Developer
07.2005 - 08.2005 |Intellisoft
C#, ASP.NET, XML, Microsoft Visual Studio
Project: Enterprise system for the company “ Acer” ● Developed parts of system
C++ developer
04.2004 - 12.2004 |Sakrament
C++, STL, Windows API, Microsoft Visual Studio
Project: TTS (Text-To-Speech) engine for the company “Sakrament” ● Adapted of the Sakrament TTS engine for Symbian OS
C++ developer
05.2000 - 02.2004 |MAMT
Borland C++ Builder 6.0
Project: ERP (Enterprise Resource Planning) system for the factory “Severstal” ● Developed forms for the factory “Severstal” processes and documents flow

Educational background

Computer Systems and Networks
1996 - 2001
Belarusian State University of Informatics and Radioelectronics

Languages

RussianNativeBelarusianNativeEnglishAdvanced