- Designed system architecture of a subscription-based SMS service prioritizing performance and scalability using a combination of microservices and event-driven architectures.- Implemented core components of high-performance, scalable system using Java, Spring Boot while making use of technologies such as RabbitMQ, Redis, SQL Server and Elastic Stack.- Lead design, development, and deployment of solutions while mentoring fully remote team.- Decomposed solutions into actionable tasks, assigning responsibilities, and supervising execution.

- Architected and implemented VoIP systems using Java, Spring Boot, MySQL, Redis and Javascript delivering a flexible and easy-to-use call center management capabilities to major local companies.- Collaborated closely with customers, aligning technical solutions with their needs.- Took ownership of full development life cycle in multiple parallel projects.

- Managed and contributed to the development of subscription-based system built with Java, Spring Boot levereging a combination of Microservices and SOA architectures. Utilized MySQL, Redis and Elastic Stack to deliver value-added services to 1 million customers worldwide.- Designed software architecture and implemented core components of a feature-rich apart-hotel management system, aligning technology choices with timelines and deliverables. Key technologies included Java, Spring Boot, MySQL, Redis, RabbitMQ, GraphQL, Flowable BPMN, Microservices architecture, Event-driven architecture.- Architected a low-code platform and developed its core components, doubling development speed.- Planned and supervised development execution while mentoring and supporting fully remote team.- Lead the recruiting and interview process of new technical talent.

- Designed software architecture and implemented core of automated loan origination system using Java/Spring Boot. Researched and integrated new technologies to ensure timely delivery of the product.- Contributed to all stages of the development of a financial fraud detection system, including designing the system architecture and implementing backend components while collaborating closely with team.- Developed SMS gateway service providing the company with SMS sending capabilities. Key technologies included Java, Spring Boot, Apache Camel, ActiveMQ, SMPP.- Gave technical lectures and provided one-on-one support and mentorship to team members.

- Contributed to the implementation of billing system API developed using Java, Java EE and Spring Boot to deliver subscriber management capabilities to partner companies.- Took ownership of full development life cycle of HLR administration panel, implemented UI and backend components of the service, enabling the company teams to manage telecom-related subscriber attributes.- Collaborated closely with cross-functional teams ensuring synchronicity and quality of deliverables.

- Developed several internal full-stack applications, using Java, Java EE, Vaadin and PHP while leveraging MySQL and Oracle databases to enhance the effectiveness of the fraud department.- Contributed to development of USSD application providing mobile service pack and balance management capabilities to 1.5 million subscribers.- Contributed to all stages of software development, collaborating closely with cross-functional teams.