Was involved in development of data management and analysis solution based on big data technologies.The stack of technologies was based on (but not limited to) Java, Spring Framework, Oracle, HBase, Solr.Also took part in migration projects to Spring Boot technology.

Was involved in building scalable multitenant Platform + multitenant application on it’s base.• Cassandra – as main storage• ElasticSearch – fulltext search, composite indexes, faceted/filtered search• RabbitMQ – messaging to communicate between decoupled larger modules• Java EE, Spring, etc. + Gradle builds + Python UI/REST tests + JUnits• Apache CXF – REST services to communicate Platform<>App backend; App backend<>App frontend• Java EE, Spring, etc. – main backend lang, modules initialization, plumbing layers...• Strebernate/Streckson - own ORM-like frameworks• Tomcat/Jetty - app servers• Amazon AWS / own rented data-centers for hosting solution

SQL language parser with syntax error reporting, to be used in SQL code editor.Worked part-time.

Took part in Big Data engines performance testing.Later I was involved in the development of computerized, networked inventory and revenue management system for a vending machine industry. That system helps making a myriad of merchandising, pricing, inventory and supply decisions in real time, every day and across various market segments and geographically dispersed store locations.The stack of technologies was based on (but not limited to) Java, Spring, Oracle, Hadoop.

Worked part-time.

Upgrade ANTLR grammars for NetBeans support.Worked part time.

Designed Java-based infrastructure, including several services using Spring Framework and Tomcat web servers.Managed Java team learning.Organized Java development for distributed team.

Took part in development of project for support IKEA Family discount program, including back-end and front-end services.Technologies used were Java Servlets, Flash components, Postgre database. Project was in production stage, used by IKEA in many countries.Worked as part of Scrum team with strict schedule and planning.

Developing ANTLR grammars for Verilog and VHDL languages.Worked in parallel to main job.

Worked as a Java/C# developer.Participated in research projects. Worked on adoption of web UI chart components in customized pages. Worked mainly as Java developer.One of project was ANTLR-based C#-to-Java code translator.