Sami Ullah

Senior Software Engineer

• Job Details:Built React + TypeScript dashboards for enterprise workflow monitoring, improving SLA compliance and operational visibility. Developed Node.js and PHP backend microservices to support enterprise applications with high concurrency and low latency. Migrated legacy monolithic systems to cloud-native microservices on AWS (Lambda, SQS, DynamoDB, API Gateway) with Docker + Kubernetes deployment. Implemented REST and GraphQL APIs for internal and external integrations, handling millions of requests monthly. Optimized database queries and caching strategies with Redis and PostgreSQL, reducing response times by 35%. Mentored engineers on React best practices, full stack architecture, and test-driven development.

Senior Full Stack Engineer

• Job Details:Developed merchant-facing dashboards with React + Next.js, integrating Node.js backend APIs for real-time transaction monitoring and fraud detection. Designed and implemented microservices architecture using Node.js with event-driven pipelines (Kafka, SQS) for high-throughput payment processing. Automated deployments using Docker, Kubernetes, and GitLab CI/CD, reducing release time by 40%. Improved system performance with Redis caching, optimized database queries, and asynchronous processing. Implemented secure OAuth2/JWT authentication for APIs to protect sensitive payment data.