• Participated in the design and development of an ETL (Extract, Transform, Load) system for a billing platform, using Java 8, SQL to automate data transfer and transformation processes, ensuring that all relevant billing information is centralized.• Achieved standardization of disparate replicator systems by developing a unified framework with Java 8, Spring, Oracle, which streamlined the creation process for new replicators and reduced development time.• Independently engineered an efficient process for configuring the replication system to expand our system's capabilities for broader third-party compatibility.• Conducted analysis and review of software components, identifying areas for improvement, proposing and implementing enhancements that led to optimized performance and system reliability.• Collaborated with a cross-functional team to discuss, test, and refine new features, ensuring their integration and functionality in alignment with project goals.

• Contributed to the development of a сlient side telecom support system designed to assist support workers in efficiently resolving user issues using Java 11, Quarkus, MySQL.• Collaborated with cross-functional teams to clarify requirements and conduct analysis for migrating the application to the latest API version of a third-party service in the short term.• Ensured operational continuity by developing and testing functionalities for the project's API migration with Java 11, Quarkus, MySQL, Mockito, WireMock. • Refined microservice interaction strategies, leading to 40% improvement in application response times.• Streamlined the framework for automated testing, driving development, bug fix, and code review processes; increased test coverage and reduced manual testing time in half using Java 11, Selenide.• Optimized the framework for automated testing using Java 11, Selenium, enabling seamless integration of new tests.• Facilitated new members integration by mentoring and promoting autotest framework, helping people to switch.• Authored clear technical documentation for new features, incorporating diagrams and code samples.• Introduced new features to stakeholders through interactive demos.

• Contributed to the enhancement and maintenance of the Learning Management System (LMS) and Human Capital Management (HCM) using Java 8, Spring, PostgreSQL.• Customized generation statistic reports system specifically to meet customer requirements, increasing HR manager efficiency.• Improved user experience by resolving 20+ high-priority bugs within a low SLA timeframe.• Added basic survey functionalities to enhance assessment options within the LMS using Java 8, Hibernate.• Developed a customizable profile feature for users to personalize their information and preferences