At present, I am part of Google Cloud Platform team at Google and working on various projects of improving Google Cloud Console, increasing scalability and reliability of Google Cloud Platform.

At part of Alexa Natural Language Understanding (NLU) team at Amazon I was responsible on improving scalability and latency of Amazon Alexa service.

At MyHeritage, I was responsible for improving the front-end part of the web application and creating front-end team in Kyiv, Ukraine (hiring, onboarding).

Twinfield is an international web service for online accounting offered by Wolters Kluwer. Twinfield facilitates the collaboration between accountants and entrepreneurs by offering a state-of-the-art cloud application that allows both parties to work on the administration in a smart, simple, secure and connected way. Established in 2001, Twinfield has a strong and growing client base in the Netherlands, UK, Germany, Belgium, and the Caribbean, that all use bookkeeping software on a daily bases.

Initially, as Regional Director, I was responsible for managing Ukrainian developers, guiding and controlling the development process, shaping requirements.

Later, as Software/Solution Architect, I was responsible for making architectural decisions for bringing the Twinfield application into a cloud. Are of responsibility covered both for backend and front-end parts, providing consistent solution covering visual appearance and streamlined development process. Besides it, he was constantly performing hands-on developing by implementing critical and new components, training other developers.

Used technologies: ASP.NET MVC, C#, AngularJS, CQRS/ES, MS SQL, RabbitMQ.

DevelopEx is an outsourcing company, that provides services to worldwide clients. As part of DevelopEx, I participated in such projects:

AuctionFloor - Huge ERP project with multiple modules and complex backend made for auction house who makes live auctions. The system includes such modules as inventory module, payment, accounting, checkout, shipping, live auction software etc. It is integrated with several 3rd party APIs (eBay, USPS, UPS, FedEx, ACH payments, Paypal, CC processing gateways) and has two bidding templates (AJAX and C++) and real-time TCP/IP server software to make live auctions.

Error report - Web-module for help desk system which allows filing help desk and inventory reports to support people.

Web Order - Business management system which allows to automate purchase processes in an enterprise and integrated with 3rd party applications.

Prospero - trending component with complex graphs drawing for 3rd party application.

FlowCharting - charting component to use as DotNetNuke module.

At Frontex I was working on Xcelerix: non-relational (entity-relational) in-memory database.

Targeting as ultra-fast information storage, Xcelerix used entity relational schemes to provide determined selection time for data queries, that in standard relation-based database system would require exponential growing time. Also, Xcelerix provided support to as many OS as possible, including Windows, Mac OS, different distributions of Linuxes, HP-UX. Technologies

Main technologies used in development were C++, Perl, and Java.

In "AMI Ukraine" I was working on PersonPro - personnel management system. Enterprise-level Ukrainian fully customizable solution that handles all processes of HR: gathering, storing, publishing information, handling complex queries about personnel, preparing customizable reports, including documents of strict accountability.

Technologies used: Delphi, ODBC

I contributed to developing Obex Web application for B2B telemarketing. A distributed system, that allows customers to plan and implement telemarketing process and calculate profits. Used AJAX to accelerate system, minimize risks of concurrent modifications and make the system more user-friendly.

Technologies used: PHP, MySQL, Design Patterns.

In Alitel I was working on VoIP billing system based on Radius server. Started as the first developer of this system, and continued as head developer of a small group of developers. Mastered C++ Unix programming, database management, multi-threaded, and time-sensitive development. Also learned how to manage a group of developers (code review, planning, etc).

Technologies used: C++ (gcc), MySQL, Radius RLM, CGI.

At Lider LLC, I was working on System for stock-taking for car-selling warehouses. The main purpose of the system was to store information about the stock status and do complex queries on searching product analogs.

Technologies used: MS Access, Delphi, BDE (Paradox).