Sai Krishna Chirumamilla is a results-driven Software Development Engineer II at Amazon, based in Dallas, Texas, with extensive experience in architecting, implementing, and automating large-scale enterprise systems. He specializes in hardware security, cryptographic systems, and cloud infrastructure, managing fleet-wide operations across thousands of hardware security modules. At Amazon, Sai has led numerous initiatives that enhanced system performance, reliability, and security. His work includes designing an enterprise-grade security recovery key system, developing a fleet-wide cryptographic key rotation framework, and implementing a two-person authorization model for privileged operations across multiple command-line tools. His automation frameworks have saved significant engineering effort, while his performance optimization projects have delivered major efficiency improvements and cost reductions for enterprise customers. Sai’s technical expertise spans Python, Java, Rust, R, and SQL, alongside frameworks such as Spring, Flask, and RShiny. His cloud and DevOps proficiency includes AWS services like Key Management Service, MSK, ECS, and Lambda, as well as Docker and CI/CD pipelines. He has deep experience in cryptography, distributed systems, capacity planning, and system performance tuning. Before joining Amazon, Sai worked at Infosys and HHAeXchange, where he developed large-scale data analytics and automation solutions that improved operational efficiency, reduced manual workload, and increased business performance. He holds a Master of Science in Computer Science from The University of Texas at Dallas and a Bachelor of Science in Electronics and Communications Engineering from K L University in India.