Development of Yandex Bank transaction products.

Development of Yandex Market billing services. Focused on the payment control project for partners. This is a system that manages millions of money transactions per month.Implementation of projects:- buy now pay later- payment by invoice for juridical persons- international billing for Israel- netting- inter-contractual netting- partial netting. I came up with the project on my own and presented it to the company. The total impact of the project was more than $5 million.I spend a lot of time ensuring the stability of the system:- development of monitoring to track the status of the system- development of automatic reconciliations between 4 major Yandex Market subsystems- assistance in passing an audit- development of universal Orders reports and Payments reports for shopsOrganizing and speaking at internal team meetups.Stack: Java 17, Quartz, Spring Boot, Kotlin, PostgreSQL, Liquibase, Logbroker, YTsaurus, internal tools for monitorings and CI/CD

Development and support of the private software for retail (GK Software Frameworks).Development of reports for stores (JasperReports).Writing and fixing SQL queries.Fixing bugs, code reviews, refactoring.Stack: Java 7 (Java 8), PostgreSQL, ORM - TBi proprietary library.Large distributed team. Most of team members was outsourced.

Project: CCM - Customer Care Management - CRM for mobile operators. One of the core parts of billing system. It implements program logic (server part) for working with product offerings, products, services and resources, that a telecom operator provides to customers. CCM is a master system for managing owner profiles, which includes data on products, resources, and owner (subscriber) attributes. Used technologies: Kotlin/Java, Oracle, Apache Karaf, Hibernate, Zookeeper, Jira, Confluence, Bitbucket, Teamcity

Group classes (up to 10 people) with schoolchildren from the 9th to the 16th years in the directions:- 3-d modeling (Blender) - primary and secondary school;- C# programming - senior school;- general computer literacy and website building - junior school;