• Developed a caching mechanism for a high-traffic endpoint handling 300,000 requests per minute, cutting database calls by 83% and enhancing API performance by 16% utilizing Flask, Redis, Celery, Kafka and Event-Driven Architecture.• Contributed to the development of the Direct Payment module for the roaming OCPI protocol, establishing a highly profitable partnership with 5 major PTPs and enhancing ChargePoint's market position. Utilized microservice architecture, Python, Flask, Golang, DDD, Kafka, PostgreSQL, and Celery as the backend.• Collaborated on the second version of the EV Roaming API which improved performance by 31% compared to the previous version, using Python, Kotlin, microservice architecture, Domain-Driven Design, Event-Driven Architecture, Kafka, MongoDB, Elasticsearch, Kibana, Sentry, Docker, Kubernetes, and Argo CD in the backend.• Enhanced the performance and response time of a data-Intensive endpoint by 5% through preventing scanning a table with more than 100 million records in each request using Python, Celery, MySQL, Kafka, Event-Driven Architecture, and partial data synchronization solution.• Expanded the test coverage by 11% for one of the Roaming APIs and added integration tests for some of the existing endpoints through pytest.• Partnered with the Product Owner to break down features, prioritize tasks, and improve sprint efficiency by 15%.• Facilitated the professional development of 3 junior developers through mentorship and guidance during my free time, demonstrating a commitment to fostering talent and knowledge within the tech community.