Backend developer of digital mobile operator izi. Currently using tech. stack: Java 8-17, Spring (Boot, API Gateway, WebFlux, Data JPA), Hibernate, ProjectReactor, Quarkus, Mutiny, Flyway and Mongock migrations, PostgreSql, MongoDB, Rabbit MQ, Kafka- Developing new, maintaining and refactoring existing microservices, bugfixing, creating new features according to business requirements. Also participating in moving functionality from the core modular monolith into separate microservices according to business domains. E.g. I've refactored content service based on Quarkus framework with reactive stack (RestEasy, Mutiny) and Mongo database (ripped of all blocking instructions and upgraded library version to the latest) which results in increasing stability from 98.7% to 99.5% according to load tests. - I've created a new push notification service using the Firebase Admin SDK as a replacement for the legacy FCM API and added a push token validation mechanism, which reduced the number of 'dead' tokens. Altogether, this led to a threefold decrease in the time required for broadcasting push notifications- Mentoring and onboarding new colleagues, code review.

Developing server side of medical information system. Deployed Absible for remote configuring hardware and software on customer's computers. Customers of our software are big goverment and private companies such as NC Kazakhstan Temir Zholy JSC, Eurasian Resource Group and others.Разработка серверной части для медицинской информационной системы. Внедрил использование Ansible для удаленной настройки рабочей инфраструктуры на компьютерах заказчиков. Пользователями ПО являлись крупные государственные и частные компании в транспортной и недродобывающих секторах (КТЖ, ERG и др.).Stack/Стэк: Spring Boot, Security, JPA, MVC, PostgreSql, Docker, Docker Compose, Ansible.

Developing software for customers (individuals, goverment sector) based on - for backend: Java SE, Spring (Core, MVC), Hibernate- for fronend: JSP + Ajax- database MySQL- mobile: AndroidFinieshed 3 projects.Разработка ПО для заказчиков(физические лица, гос. сектор), используя следующие технологий:- бэкенд: Java SE, Spring (Core, MVC), Hibernate- фронтенд: JSP + Ajax- база данных: MySQL- мобильная разработка: AndroidЗавершил 3 проекта.

Developed and maintaned the billing system of JSC "Kazakhtelecom".Particularly, developed web-application for service dealers of Kazakhtelecom integrated with 3d party services.Занимался разработкой и сопровождением биллинговой системы АО "Казахтелеком". Разработал веб-приложение для дилеров услуг АО "Казахтелеком".Stack/Стек - Java SE, Struts, Spring MVC, Hibernate, Oracle 10g/11g, ColdFusion