Engineered a digital booking platform for managing boat reservations for Agapi, working across both frontend and backend systems. Focusing on improving system usability, security, and reliability across frontend and backend components. Resolving complex UI and integration issues, enhancing overall user experience. On the backend, implementing role-based authorization mechanisms for management services, strengthening access control and platform security. Supporting ongoing platform improvements to ensure stable performance and alignment with business requirements.

Developed and maintained financial integrations at Lendo Integrations, a platform that enables users to compare loan offers from multiple banks. Designed and implemented secure integrations with external banking systems, ensuring reliable data exchange in a highly regulated environment. Developed microservices to support communication, service orchestration, and reliability across multiple partners. Contributed to infrastructure design, helping maintain performance, fault tolerance, and system stability. Supported API development, testing, and regular system improvements to ensure system stability, data accuracy, and reliable platform performance.

Contributed to a large-scale content and advertising platform (partner of Huawei and Xiaomi) that delivers personalized news and ads across multiple countries. Focused on performance, scalability, and using data to improve the system. Built and improved APIs and integrations to handle high traffic loads efficiently. Implemented monitoring and anomaly detection using Prometheus, SQL, and Grafana to improve system reliability and observability. Built a service that generates automatic business reports from about 100GB of daily data. Implemented caching strategies with Redis and S3 to reduce delays and significantly improve system performance.

Built and enhanced backend services for a high-load marketing communications platform at OZON Tech, enabling automated and real-time notifications for customers, sellers, and internal users. Participated in building the platform from scratch, contributing to architecture, core system design, and production release. Designed and enhanced microservices for message delivery, implemented role-based access control for internal services, and evaluated algorithms through benchmarking and testing to improve performance. Contributed to message generation and delivery workflows, ensuring efficient communication across the platform.

Engineered core features for GetMark, a platform for goods tracking and compliance that enables businesses to integrate with government services and comply with state regulations. Implemented complex SQL logic to support key platform features and ensure accurate processing of business operations. Improved system reliability through troubleshooting, bug fixing, and ongoing enhancements. Documented use cases, workflows, and status flows for business objects, improving customer support, process transparency, and overall service quality. Participated in the project from its early stages, contributing to the platform's stability and operational efficiency.