Contract freelance web applications development for clients around the world.

• Participated in building a number of new products for Toptal SOA platform: Consultations, Blog Post requests, Talents knowledge sharing. Those improved value of the Toptal Platform for Clients, Talents and Toptal staff• Resolved cross-team/cross-service integrational issues• Mentored middle developer colleague, resulting in their professional growth and confidence• Focused more on backend side, done plenty of frontend work too

Full stack development of Ruby On Rails and EcmaSript6 projects for various clients around the world (Switzerland, UK, USA and more) via Upwork platform. Some projects:• Viasocket.com, a SAAS automation tool that makes it possible for end-users to define and utilize API flow solution without coding. I built first version, then improved the backend part, e.g. added asynchronous flow steps support and support for workflow steps' cycles and conditions.Stack: RoR, Angular, Sidekiq, Postgres• Enterprise document management product. I participated in building its frontend and a framework of front-end components. I also set up a comprehensive e2e testing workflow using Selenium, CircleCI and Docker. Stack: Ecmascript6, Bootstrap, Selenium, CircleCI, Docker• Testerpool, Deutsche-English bi-lingual web application that helps people organize testing sessions of their products. I improved and supported it. I also led a development team. Stack: Ruby On Rails, React, Ecmasctipt 6• Pricemate, an affiliate deals web app based on Discourse. Built a suite of Discourse plugins to match the required functionality and UI design. I also led a development team where we improved the product. Stack: Ruby on Rails, Discourse, Ember.js, ActiveCampaign, Google Cloud Platform• Rera.io, construction site management SAAS application. I supported and improved it. Stack: Ruby on Rails, Bootstrap• Multiplatform desktop application similar to Dropbox. Built it from scratch (with existing backend) using Electron. Stack: Electron, Angular, Typescript, Rust• Desktop application for running e2e tests defined in user's CSV files. Stack: Electron, React, Typescript, Selenium

Development of Kroogi, innovative site for artists (music, literature etc) and their fans with multiple payment models for content (pay-what-you-want and minimum price) and crowdfunding.• Developed application features• Built API for mobile application• Implemented performance optimizations• Maintained site infrastructure• Led engineering team• Migrated large database from MySQL to PostgreSQL

Development of both public online services and bespoke Web-based applications for clients in UK and Brazil using technologies of Ruby (on Rails), Java and open source.

Business applications development in dedicated centre for Deutsche Bank using J2EE and open-source technologies.

Business applications development for assorted Russian clients using in-house add-on for Microsoft Office, and development of that add-on.