• Played a pivotal role in championing the adoption of Cloud Native solutions for a streaming service with over 10,000 customers, ranging from large corporations to small startups.• Achieved $600,000 annual savings and ensured GDPR compliance by automating the deletion of unused customer code from the S3 bucket, while also deploying fixes across 26 regions.• Ensured service availability in two private/air-gapped secret regions by authoring a comprehensive System Security Document that encompassed the entire service ecosystem.• Eliminated 1600 system security issues, by automating the deletion process of unused/stale environments within the service.• Upgraded Runtime Environment of one of the key/strategic products within the service, greatly impacting the release of a new major version.• Leveraged knowledge: Java, Apache Flink, Kubernetes, Docker, AWS, Ruby, Golang

• Developed the backend system for a carsharing service that processes 1 million rides per week.• Tracked down the key weak points of a backend system by analyzing 500 terabytes of log entries.• Optimized car assigning algorithm by 20 million times by reducing the time complexity from O(n²) to O(log n).• Boosted geoscopical data querying by 400% by integrating GeoHash, which improved time complexity from O(n) to O(log n).• Designed a real-time MapReduce system, that tracks the riding behavior of a user.• Leveraged knowledge: C/C++, in debugging with gdb, Git, PostgreSQL, Postman.