Involved in architecting and building the frontend SPA for Kleene users (with ClojureScript, React and Datascript) Built a bunch of connectors (data extraction jobs) to third-party systems as part of managed and automated ETL engine. Later was involved in architecting and implementing an automated system for delivering such connectors. Reworked the entire backend framework used to build services under the Kleene platform. Was responsible for architecting the internals of Kleene's platform (system design and inter-services communication) Built the whole cloud (AWS) infrastructure from scratch, including resources provisioning (ECS clusters and services, S3, EFS, Kafka, SQS, RDS, Clodwatch, ALB, CloudFront, etc.), autoscaling and CI/CD pipelines using AWS CDK and Cloudformation. Set up and configured the Elasticsearch cluster for logging. Worked on automated end-to-end tests using Cypress and required infrastructure for them (Cypress dashboard integration, triggers, etc.)

Developed GraphQL based microservices. Architect and developed automated payout system for Stripe. Tech stack: - Clojure - Datomic - GraphQL (lacinia-pedestal) - Stripe API

Created a web application that helps parents find activities for kids and a back-office web application for activity providers and business holders. Worked tightly with a web designer and marketing team to improve UX. Integrated web applications with our own REST API and third-party services like Google Analytics, Google Maps, Sentry, Segment, Auth0. Tech stack: - ClojureScript - Reagent - Re-frame - React - NodeJS

Created user interfaces for the biggest Russian cloud platform. Worked with two different fields of tasks: 1 B2C cloud storage. Cloud file storage aka Dropbox, Google Drive. Worked on rendering optimization (users folders could rich the 16 000 files), uploading files and folders on demand. Improved user auth flow. Worked on the internal unit testing framework. Developed the API documentation pipeline and CLI (to manage pipeline) on top of apiblueprint (https://apiblueprint.org), gulp.js and GitHub webhooks. 2 B2B cloud services (aka Amazon S3). Created web interfaces to manage cloud storages for business on top of S3 protocol. Worked on landing pages for the marketing team.

Developed the user interfaces and services for the biggest marketplace in Russia. Created interfaces for the whole purchase process. From order creation to delivery services integration. Moved whole YandexMarket infrastructure from XScript platform to NodeJS. Developed SPA for purchase and order refund processes. Tech stack: - NodeJS - Express - Backbone - i-bem - XSLT

Developed front-end of internal ERP system Architected data storage (MySQL database) Integrated email client in own ERP system

Developed many different websites (outsource company) Improved company open source projects (https://www.drupal.org/project/single_page_website)