Product delivery service

Sphere Software is an outsource company where I'm working on the Gett Enterprise project. Gett Enterprise is an application for corporate clients and contains a lot of features that help companies to manage and optimize taxi expenses.- Fixing bugs and reducing technical debts.- I participated in the implementation of a few significant features and algorithms that have to optimize company expenses. Such as grouping similar rides to make them use one single car or optimizing the order of stop points. - Working on simplification and standardization of certain parts of business logic.- Analysis requirements and planning of current sprints.- Participating in making architectural decisions.

Finservice company is providing a SaaS tool for credit brokers. It's a big Rails application that brings together a large number of banks and other credit service providers.- Developing and maintaining a big Rails application: - Splitting to independent parts to reduce complexity and interdependencies. - Improving, refactoring, and implementation of new features.- Analysis requirements and planning of current sprints.- Participating in making architectural decisions.

The company provides a SaaS solution for corporate travel. The main application allows companies to organize their travel processes (choose an itinerary, get approves, book and so on). The reliable system consists of a few monolith and small applications which communicate with each other.- Developing and maintaining a big Rails application: * Splitting to independent parts to reduce complexity and interdependencies. * Developing private and public API. * Improving, refactoring and implementation of new features.- Developing and maintaining a few Rails/Grape applications: * Rails/ReactJS/MapBox application - the tool which allows seeing on a map where employees are in their corporate traveling and contact them in emergency cases. * Grape/Sinatra application - event sourcing application which collects all data about users' trips and stores their history. All stages of a particular trip from draft to booking. * Sinatra application - service intended for rendering representation of itineraries of booked trips.- Analysis requirements and planning of current sprints.- Developing tools for internal company needs using Ruby, Elixir, ReactJS: * Slack-based client for GDS terminal. It allows support and QA engineers to communicate with GDS terminal using Slack messaging. * Ruby gems and libs, such as API clients for example.- Participating in making architectural decisions.

SaaS platform that helps to control of a retail chain of drugstores. It contains over 1500 stores.- Developing and maintaining of two big rails applications: * POS-terminal. It was deployed to all POS terminals for over 1500 stores. * A back office which lets managers update the POS from a single location. The application allows managers to control selling processes: manage products, pricing, inventory control, purchase returns, discounts and so on. Huge monolith with many background processes.- Improving architecture and design of applications.- Improving, refactoring and implementation of new features.- Participation in making architectural decisions.- Reworked the data exchange system between suppliers and the application.- Urged teammates to follow TDD, wrote tests and created TDD and CI environment for all applications.Rails, Mysql, Sidekiq, Redis

Duriana is a mobile marketplace for all things.- Began as a single developer, finished as a team leader.- Reworked the backend API: it was a single file Sinatra application with over 3000 lines of code and over 40 endpoints without any test and became a well-structured application with tests.- Created from scratch testing environment.- I have migrated the application from the MongoDB database to PostgreSQL database.

JetRadar is a travel search engine that allows users to compare airline prices and offers, specializing in low-cost airfare.- Developing and maintaining a few Rails application: * Participating in the development of a search engine. * Building a system of collecting, processing and exporting user search data. * Participating in the implementation of event-based statistic system that was used for internal purposes (RabitMQ, Ruby). * Developing and maintaining complicated 'smart' mailings and subscriptions.- Improving, refactoring and implementation of new features. - Analysis requirements and planning of current sprints.- Participating in the introduction of agile processes: * Helped the team to start using SCRUM and agile practices. * I was in the role of a SCRUM master.Ruby, Ruby on Rails, MySQL, MongoDB, Redis, RabbitMQ.

Built a social network and expert system for scientists who work in the field of nanotechnology. Built a multiparameter search for measurement results of a nano microscope including the search for similar images of the measurements results and other data.Ruby on Rails, PHP, Javascript, jQuery, PostgreSQL, mySQL, C++.

Developed the interface of an Internet-advertizing broker (clx.ru).PHP,CakePHP, pgSQL, Javascript, jQuery.

Developed web-applications and services for clients.ActionScript, Flex, AIR, PHP (Bitrix, CakePHP, WebORB, Doctrine), MySQL, Javascript, jQuery.

Developed and supported websites garant-ic.ru, russia-ic.com. Administered UNIX servers and workstations.PHP, MySQL, Javascript, prototype.js.