Muhammad Murta za

Led end-to-end architecture and delivery of a multi-tenant SaaS platform using TypeScript, Node.js, and React. Mentored mid-level engineers and established strict code review standards. Refactored legacy Express.js monoliths into modern NestJS microservices, reducing API response times by 30% and improving scalability under high traffic. Built real-time notification and live-editing experiences using WebSockets (Socket.io) with concurrent connections and zero downtime. Integrated AI-driven features with LangChain, OpenAI APIs, and DeepEval, linking Node.js microservices with LLMs for evaluation, hallucination control, and response accuracy. Optimized PostgreSQL and MongoDB schemas and indexing, cutting execution times by 45%. Reduced AWS costs by adding Redis caching for heavy API requests, lowering Node.js CPU load by 25% during peak traffic.

Modernized a legacy platform into a type-safe React/TypeScript and NestJS ecosystem, improving frontend delivery speed by 40%. Designed and secured REST and GraphQL APIs using JWT, OAuth2, and RBAC for multi-tenant, access-controlled environments. Built automated test suites from scratch using Jest and Cypress, reaching 88% code coverage and reducing production regressions by over 50%. Containerized development and production environments with Docker and AWS ECS, and automated CI/CD pipelines with GitHub Actions. Worked closely with product and business stakeholders to translate requirements into technical roadmaps in an Agile setting.

Developed and maintained secure Node.js and Express backend services alongside React frontends for administrative workflows and high-volume transaction processing. Implemented authentication and authorization layers using JWT and RBAC to secure REST APIs and protect sensitive user data across distributed systems. Integrated AWS S3 for secure media hosting and improved Node.js runtime memory management by identifying and fixing critical memory leaks in production. Authored reusable, component-driven React libraries (Redux, SASS) and collaborated in Agile sprints to accelerate UI development across internal management tools by 20%.