● Developing a stack of scalable microservice applications with Golang for centralized accounting system, utilizing different technologies and approaches.● Created Gitlab-Ci pipelines with integrated tests and linters, implementing deployment as a continuous process with ease of quality and stability control.● Contributing to the development of single-page front-end application with Angular, created task management and media subsystem.

● Played a critical role in developing backend part of internal project management and corporate social application.● Designed custom cross-domain authorization system. ● Created a backend-driven ui library, providing delivery of new features without modifying front-end and mobile application, contributed to developing js and ios implementations.● Serving as lead of CI/CD group, designed processes, implemented Jenkins pipelines with integrated auto-testing and static analyzers, which decreased average deployment time from several days to 2 hours. Designed and forced using of code and documentation conventions. Reduced average number of production bugs by 4 times.● Designed customizable notification system, allowed auto creating notifications by subscriptions to internal workflow processes.● Contributed to performance optimization, reworked data structures and SQL queries, decreasing average latency by 40%.

● Contributed to developing and maintaining internal ERP system of pharmacy chain company. Implemented various internal modules and third-party integrations.● Designed an attribute-based access control system for organisation group of 200 units with more than 10k employees combined.● Created full stack web application with React/Redux as front-end for managing customer bonuses. Implemented monitoring, third-party reporting and integration with customer support.● Implemented new transportation logistic module with mobile app and fuel expense monitoring, that reduces total logistic expenses by 15%.

● Worked as a lead developer in developing and maintaining internal ERP system of wholesale company. Successfully implemented ERP solutions, customized modules, and integrated third-party applications to enhance system functionality and meet specific business requirements.● Designed an alcohol movement control system, allowed online monitoring and reporting on every stage to meet the industry regulations.● Reworked warehouse workflows, automated logistic tasks and documentation processing, leading to increased productivity and reduced average order processing time by 40%● Successfully mentored junior developers, providing guidance and support in their professional growth and technical skill development● Managed a cluster of MS SQL servers, configured maintenance plans and performance monitoring. Optimized requests, leading to improved performance of reporting system by 2 times.

● Contributed to developing application for restaurants, with POS functionality (integration with cash register, bank terminals, scales etc.), back-office (product calculation, warehouse management, official reporting), and a mobile application with manager analytics.