Ivan Achkasov

Java Software Developer @Claryfi

High loaded financial application with a million users and 100+ financial transactions per second- Developed new features for a high-performance product processing over 100 financial transactions per second, supporting low-latency requests through caching and efficient use of RDBMS- Increased test coverage from 15% to 65%, adding robust test rules- Implemented integrations with external APIs, including OAuth for secure authentication and AWS S3 for scalable storage- Built data collection and delivery features to facilitate accurate financial reporting for the accounting team- Standardized the codebase by introducing consistent structure and coding rules- Collaborated on resolving a critical code issue that led to financial losses in the thousands- Analyzed and resolved database performance issues caused by inefficient indexing- Delivered over five new API integrations for client solutions.