Eduard Grinchenko

Moscow, Russia

Member since January 8, 2015

Eduard is a talented software engineer with rich expertise in object-oriented analysis and design and experience participating in all facets of the software development lifecycle, from analysis and design to implementation and maintenance.

Eduard is now available for hire

Hire Eduard

Portfolio

Toptal and Toptal Clients
Java, Spring, AWS, Docker, AngularJS
37coins
Java, AWS, Hazelcast, Guice
Andiks
Java, Spring, MongoDB

Experience

Java, 7 years
Spring, 6 years
REST, 6 years
Design Patterns, 5 years
Spring Boot, 4 years
SQL, 3 years
Docker, 3 years
MongoDB, 2 years

Availability

Part-time

Preferred Environment

IntelliJ IDEA, Git, Gradle/Maven

The most amazing...

...thing I've coded is a system of calling chaining methods to calculate game object parameters in real time based on current state, affecting objects and actions.

Employment

Senior Java Developer
Toptal and Toptal Clients
2015 - PRESENT
- Built microservice architecture for logging delivery.
- Developed Spring Boot applications for a client-facing trading system.
- Developed JIRA, Confluence, etc. plugins for medical quality assurance.
- Supported and developed a big Spring ERP application for the US government.
- Developed and supported infrastructure for a bankruptcy service application.
- Developed and supported several admin applications based on AngularJS.
Technologies: Java, Spring, AWS, Docker, AngularJS
Team Lead/Architect
37coins
2015 - 2015
- Created an SMS wallet for bitcoins.
- Managed a team of three developers.
- Improved the architecture of the system.
- Created an API protocol for the Android application through REST calls and Google Cloud Messaging.
- Created a migration tool for migrating accounts from the old version of the product to a new one.
Technologies: Java, AWS, Hazelcast, Guice
Senior Java Developer
Andiks
2014 - 2015
- Participated in the development and server-side design of a new 3D browser game.
- Developed a system for real-time effects and a spells manager for a 3D battle server which controls all spells and effects applied to the game character.
- Implemented a shop service for the web-game server.
- Developed a task service for managing user intentions. It was a three-part project with a common module. I set up the building application with Gradle and Git submodules.
Technologies: Java, Spring, MongoDB
Java Developer
Budget Financial Technology
2012 - 2014
- Developed core elements of a QDP platform for managing a municipality.
- Built an analytic presentation module.
- Developed and supported a new concept for a UI based on Vaadin 7, and migrated from Vaadin 6 to Vaadin 7.
- Conducted complex refactoring of a core module for the QDP (Quick Development Platform).
- Implemented and maintained technology for new clients.
Technologies: Java, Spring, Hibernate, Vaadin
Java Developer
Fundcount
2011 - 2012
- Developed software for managing mutual funds.
- Developed and supported a social office project based on Liferay for our software users.
- Programmed for a version runner project for running software on a client host using WebStart, Vaadin and Spring.
- Created a new reports generator.
- Built unit tests for business methods.
Technologies: Java, Spring, Vaadin, Hibernate, JNLP

Experience

Browser-based 3D Game (Development)
Contributions to the back-end web development for this game.
Imandra (Development)
http://aestheticintegration.com/
Contributions to the back-end development of this project.
Why You Need to Upgrade to Java 8 Already (Publication)
https://www.toptal.com/java/why-you-need-to-upgrade-to-java-8-already
The newest version of the Java platform, Java 8, was released more than a year ago. Many companies and developers are still starting new applications with old versions of Java. There are very few good reasons to do this, because Java 8 has brought some important improvements to the language. I'll show you a handful of the most useful and interesting ones.

Skills

Languages
Java, Regex, Groovy, XML/XSLT, SQL, XPath, JavaScript, CSS, HTML, C++, Kotlin, Python, PHP
Frameworks
Vaadin, Spring Security, Spring Boot, Spring, AngularJS, Mockito, JUnit, Android SDK, Guice, Bootstrap, Swagger, OSGi, Apache Velocity, JSON Web Tokens (JWT), Hibernate
Libraries/APIs
Jackson, Java Collections, Socket.IO, Stripe, Apache POI, JAXB, SLF4J, GSON, Liquibase, jQuery
Tools
GitLab CI/CD, Maven, JIRA, Atlassian Confluence, NPM, Git, JIRA Plugins, Docker Compose, GitLab, Gradle, Apache, FreeMarker, AWS SDK, Google Cloud Messaging, Nginx, Apache Tomcat
Paradigms
REST, Design Patterns, Object-oriented Programming (OOP), AOP, Scrum, Concurrent Programming
Platforms
Docker, Google Cloud Platform, Windows, Amazon Web Services (AWS), Amazon, Android, Unix
Storage
MySQL, MongoDB, Microsoft SQL Server, PostgreSQL, Hazelcast, PostgreSQL 10.1
Other
Math, Lambda expressions, Project Management, log4j, Apache Commons, Liferay

Education

Master's degree in Computer Engineering
National Research University of Electronic Technology - Moscow
2011 - 2013
Bachelor's degree in Computer Engineering
National Research University of Electronic Technology - Moscow
2007 - 2011