Mohamed Arafa

•Engineered a high-concurrency Microservices Architecture using NestJS, TypeScript, and RabbitMQ, decoupling data ingestion from processing to handle high-throughput event-driven workflows withexponential backoff retry mechanisms. •Implemented Redis caching and distributed locking strategies (Redlock) for read-heavy endpoints, reducing PostgreSQL database load by 40% and achieving sub-millisecond response times under concurrent access. •Designed polyglot persistence layers using PostgreSQL (transactional data), MongoDB (document storage), and Elasticsearch (full-text search), selecting each database for its optimal use case. •Orchestrated containerized deployments using Docker and AWS ECS (Fargate) with auto-scaling policies triggered by CPU/memory utilization thresholds. •Established CI/CD pipelines using GitHub Actions to automate linting, building, and unit testing (Jest), enforcing quality gates that prevented broken code from reaching production. •Defined strict API contracts using Swagger/OpenAPI with Bearer Auth, facilitating seamless frontend collaboration and reducing integration errors.

•Completed a 3-month Full Stack Development internship, gaining hands-on experience across the full software development lifecycle from architectural design to deployment. •Developed RESTful APIs and server-side logic using Node.js, integrating frontend interfaces with backend services and database systems.

Full Stack Development internship

Social Hakers Academy Internship