System Design Developer in Kazan, Tatarstan, Russia

Billing system for private air passenger transport
- Developed the architecture of a client-side web application
- Developed system of High Order Components for rapid development
- Implemented bill preview component
- Developed JSON API for a client-side application
- Developed UX/UI
- Test coverage
Technologies: ES6, React, Redux, MaterialUI, Webpack, Jest, Sinon, Enzyme, Groovy, Grails

eCommerce service for finding gifts with a paid products placement
- Developed an architecture of the web application
- Developed a domain data model with business analysis
- Developed UI/UX
- Developed and optimized SQL queries
- Developed a billing component
- Developed an AB-testing framework
- Developed a listing algorithm based on product's CTR
- Developed in-house CMS
Technologies: ES6, Webpack, React, Redux, JQuery, Spring Boot, WebFlux, JDBC, PostgreSQL, Thymleaf, Docker

Analytical system for government roads traffic
- Developed the architecture of the decentralized web application with guaranteed delivery of a data packet from dedicated nodes with a poor internet connection
- Implemented routes of a data flow
- Implemented UI components
- Organized stress tests
Technologies: Apache Camel, ActiveMQ, Docker, Spring, Hibernate, Vaadin

Online Queue is a system that helps organize the queue of people in government organizations. I used JavaScript to display the queue state and playback synthetic speech. On the back end, I used Java.

Highway state monitoring system helps get operating information about incidents that happen on roads. The system consists of several amounts of subsystems that communicate with each other by enterprise bus with a SOAP interface. I developed one subsystem for the administration of the system. Front end created with Vaadin.

The application is similar to Jira or Redmine with adoptions for the business needs of a police department.

The system provides workflow with document digital signature. This application helps reduce the costs of making decisions in the company.

Uni-media is a portal with legal digital content with DRM protection. The front end was created using HTML and JavaScript (jQuery). The back end is powered by PHP and the core features (DRM) are implemented with C++ modules.