* Created backend REST APIs using Java to manage information for over 25000 Amazon sellers globally, ensuring accurate and

timely calculation of Amazon fees for various promotional campaigns.

* Facilitated the allowlisting of Egypt sellers by integrating Amazon’s distributed systems, S3, and AWS Lambda, enabling

access to currency conversion features on Amazon’s seller website, thus expanding Amazon’s operational capabilities.

* Enhanced software development efficiency and robustness by reducing 50% of development hours through the design and

implementation of a compliance flags migration strategy from DynamoDB to AWS Appconfig.

* Migrated services from an AAA-based system to a cloudAuth based system maintaining 100% service availability.

* Handled on-call operations, maintained CI/CD pipelines and resolved high-severity tickets, ensuring service availability

with minimal downtime and enhanced reliability through post-incident analysis and preventive measures.

* Implemented comprehensive JUnit tests, improving code coverage from 70% to 95%, ensuring greater reliability and

robustness of the cloud-based application.

* Ensured system stability by establishing integration tests for distributed systems, verifying inter-system functionality.