• Helped young startup make real their business models• Participated in the creation of INCARD - a digital business card. • Creation of INPET - smart tags for your pets• Proposed technology stacks and application architectures

• Maintained and developed B2B BigData application for the USA market. • Refactored from scratch two big complex and RAM-costly parts of the application, resulting in an acceleration of 3-4 times.• Mastered ”Debugging”, since there were a lot of bugs • Ensured the operation and communication of microservices • Wrote more than 500 tests (Integration tests, E2E controller tests, and mainly Unit tests) (Test coverage 85%+ )• Made successful deployments to production. • Systematic Code Reviews. • Participated in Agile Scrum (Planning, Grooming, Retrospectives) and was involved in the whole process of system and software development.

• Communicated closely with clients and team to increase development productivity.• Worked closely with technologies such as Nest.js and ElasticSearch to develop microservices.• Offered solutions to speed up the loading of thousands of products and improve UX, which subsequently resulted in acceleration by 4-5 times.• Developed and maintained Telegram bots which were used by more than 10,000 people all over Ukraine

• Contributed to developing companies' websites with Javascript / JQuery and MsSQL.• Led a team of 3 juniors in the creation of a commercial project for ExpressBank ”Sales Management Software, warehouse management system”.• Implemented from scratch the next features: multi-warehouse, multi-currency, automatic detection of expired products, inventory process to identify excess or missing products, auto-generated reports (journal of transferred, deleted, sold, purchased products) giving you information on allrelated products