• Developed efficient back-end applications using Spring Boot, Java, and micro-services resulting in an increasing feature delivery by 25%• Successfully integrated third-party APIs and services to enhance the functionality of the applications, contributing to the overall save manual work up to 30%• Developed and implemented logging library adopted department-wide enabling the creation of unified reporting that enabled error detection time to be reduced by 50%• Collaborated with cross-functional teams to deliver new functionality to production, ensuring seamless integration and continuous improvement of the applications.• Provided mentorship and assistance to junior developers increasing their coding productivity, and professional growth.

• Designed and developed the back-end part of the system for management regulatory reference information, • Integrate the system with existing company infrastructure (billing, customer management systems, and product catalogs).• Identified and resolved 95% of defects and bugs during the tests, preproduction, and production, thus guaranteeing the adequacy and quality of the application.• Actively involved in all stages of the application development cycle.

• Re-engineered applications utilizing contemporary methodologies and libraries resulting in enhanced throughput, scalability, and security.• Actively participated in the technical decision-making process in the software development process and implemented these solutions.• Led the development process of the back-end team, ensuringg alignment with goals and timelines.

• Developed services such as card payment service, messaging service, report service in collaborationwith devOps and testers teams. Took part in the application lifecycle from development (coding,tests writing, bug solving, docs writing) to production deployment. Technologies: Grails, Spring boot,Hibernate, Postgres, Linux.

Payment transaction service development, coding, testing. Technologies: Java, Spring, Oracle DB,tomcat, ActiveMQ