Karim Abbes

- Designed and implemented HyperledgerLab2, a framework for automating the deployment of a Hyperledger Fabric testbed on Kubernetes clusters provisioned via OpenStack. - Automated infrastructure provisioning with Terraform and enabled deployment of containerized applications using Helm charts and Kubernetes. - Integrated Hyperledger Caliper to benchmark network performance and evaluate metrics such as throughput and latency, achieving up to 1,000 transactions per second with LevelDB and a 9-second average latency for write transactions. - Evaluated the impact of configuration variables (e.g., organizations, peers per organization, batch size) on system performance, optimizing for enterprise-grade scalability. - Enabled flexible configuration of blockchain networks for research experiments, with capabilities for customization and performance evaluation in distributed environments. Key Technologies: Hyperledger Fabric, Kubernetes, OpenStack, Terraform, Hyperledger Caliper, Helm, Docker, LevelDB, CouchDB Thesis Summary: This thesis focused on automating the deployment and performance evaluation of Hyperledger Fabric networks in a production-grade cloud environment. It addressed challenges in deploying distributed systems and benchmarking their performance using configurable testbeds. Key contributions included designing a scalable, flexible framework for provisioning cloud resources, deploying blockchain networks, and automating performance measurements.

During my time at Loyalty Partner Solutions GmbH, a leading provider of customer management solutions in retail, transportation, and aviation, I contributed to the development and enhancement of their flagship software platform, the Loyalty Management Suite (LMS), which powers renowned loyalty programs like PAYBACK, Deutsche Bahn’s bahn.bonus, and Lufthansa’s Miles & More. Key Contributions: - Designed and developed a concept for integrating Java applications with Siebel CRM, enabling seamless communication between systems. - Created and implemented JUnit tests to ensure robust functionality and reliability of Siebel Business Components. - Developed a Java framework to streamline the integration and utilization of system outputs, enhancing efficiency and maintainability. This role allowed me to sharpen my skills in Java development, CRM integration, and test-driven development while contributing to industry-leading loyalty solutions.