- Completed a business-critical task to establish our own development process, resulting in a 50% reduction in development costs and increased efficiency in delivering new features.- Redesigned the local setup and deployment (CI/CD) scenarios for the app, resulting in a threefold reduction in onboarding time. Additionally, deployment time has decreased by up to five times.- Refactored non-flexible and hard-coded parts of the application, and made possible to increase number of new customers by 30%.- Designed an architecture for a new version of the main application that supports multi-tenancy and is capable of serving 100 times more customers while keeping infrastructure costs to a minimum.Implemented several new features and successfully released into production.

- Successfully integrated one of the 20 external API service providers into application core.- Created Docker based local development environment and made possible to work in any OS.- Automated a part of workflow by writing Gitlab pipelines for building base Docker images.- Participated in refactoring high load API app with 2M+ SQL queries per second and 100K+ active sessions.

- Improved dev workflow and CI/CD processes and significantly minimized human made errors in production releases by 90%.- Redesigned product licensing system that helped to reduce number of unlicensed usage by 70%.- Integrated our support platform with Zendesk API, doubling our support team's effectiveness and increasing customer satisfaction.- Reviewed security and recoverability of production infrastructure by configuring access levels, backup system and monitoring, which resulted reduction in sites downtimes up-to 90%.- Migrated end-user documentation to cloud platform (GitBook), also configured it for keeping internal documentation which helped to increase company's knowledge base which is also positively affected working efficiency of staff.

Developed and maintained main website. Designed internal infrastructure, micro-services for different parts of the system (image processing, CMS system, search system, etc).