Senior Full Stack Engineer with 4+ years of experience designing and building scalable, distributed applications using Node.js, React.js, Express.js, MongoDB, PHP, Redis, AWS, and Docker. Proven track record delivering high-performance REST APIs, microservices, real-time systems, and cloud-deployed platforms across healthcare, e-commerce, and inventory domains. Strong foundation in system design, caching strategies, asynchronous processing, CI/CD automation, and production troubleshooting, with hands-on experience improving API response times by up to 40% and reducing infrastructure costs through containerization and query optimization. ⸠4+ Years of Full-Stack Development Experience ⸠REST APIs with Payment Gateway & WhatsApp Webhooks ⸠API Performance +40% via Caching & Query Tuning ⸠Microservices Architecture, incl. Tax Calculation Service ⸠AWS Deployment â EC2, S3, Load Balancer, IAM ⸠Docker & Jenkins CI/CD for Redis & PDF-Gen Services ⸠Redis Caching for High-Traffic Product/Catalog Data ⸠System Design, Queueing & Background Job Processing