• Engineered backend systems with Node.js and Express.js, improving system performance and reducing server response time by 150ms, which significantly enhanced platform speed. • Spearheaded the development of RESTful APIs using Express.js and integrated Swagger for documentation, accelerating the integration of Skiff’s encrypted products and streamlining cross-service communication. • Optimized database management with Mongoose and MongoDB, handling over 100 million database queries per month and reducing query response time, improving overall user experience. • Led the migration to a microservices architecture using Docker and Kubernetes, scaling services to accommodate increased traffic and reducing infrastructure costs by $150,000 annually. • Implemented service mesh solutions with Istio, improving microservice communication latency and enhancing security across services. • Integrated GraphQL to handle data queries more efficiently, speeding up data retrieval times and resource management. • Enhanced caching strategies using Redis, minimizing server load and improving data access times. • Built and optimized CI/CD pipelines with Jenkins, automating deployments and increasing release frequency. • Implemented distributed tracing with Jaeger, improving system observability and reducing debugging time.

• Developed backend services using Python, managing over 500,000 daily API requests to ensure reliable, high-performance operations. • Designed and implemented microservices with Flask and Django, supporting 3 client applications and improving the feature delivery pipeline. • Reengineered critical PHP components, reducing integration errors and improving system stability. • Deployed serverless functions with AWS Lambda, S3, SQS, and SNS, reducing infrastructure costs by 35%. • Provided consultation on Python data processing and automation, leveraging Pandas and NumPy to enhance data workflows. • Maintained and optimized backend services using Node.js (Express.js), incorporating performance enhancements and best practices. • Mentored a team of 4 junior developers, fostering skill development and boosting team efficiency. • Authored test cases using PyTest, PHPUnit, Mocha, and Chai, ensuring high code reliability and minimizing bugs. • Collaborated with frontend teams, integrating services with React, Angular, and Vue.js for a cohesive application experience. • Coordinated with Scrum teams to optimize sprint planning, daily updates, and issue resolution.

• Designed and deployed 10+ RESTful APIs within a microservices architecture using Node.js and Express.js, supporting over 1 million daily transactions and improving integration speed. • Automated client management systems with Node.js and Express.js, reducing manual tasks by 80% and improving operational efficiency. • Refined React components, enhancing frontend performance and user experience. • Actively engaged in Agile SDLC using SCRUM methodologies, contributing to sprint planning, daily stand-ups, and retrospectives. • Utilized PM2 for performance monitoring, minimizing downtime in microservices. • Managed and optimized 5+ MySQL databases, reducing backup time and improving database performance. • Created UML diagrams, streamlining development processes and reducing onboarding time for new developers. • Expanded backend functionality with PHP scripts, enhancing system flexibility and cross-platform compatibility.

• Developed an E-Cash Management tool handling $50 million in annual transactions, enhancing data security using Node.js, PHP, SQL, Vue.js, and Angular. • Applied MVC, Singleton, and DTO design patterns to build maintainable and scalable backend and frontend solutions, leading to efficient system development. • Optimized database performance using MySQL and MsSQL, cutting query time and boosting database efficiency. • Enhanced frontend with React.js, Vue.js, and Angular components, improving user engagement and overall interaction with the platform. • Conducted thorough integration, unit, system, and stress testing, ensuring system reliability and reducing post-release bugs. • Developed backend components with Node.js, Express.js, and RESTful APIs to handle traffic loads, improving response times. • Automated backend processes and data manipulation with Python scripts, optimizing system efficiency and supporting backend operations. • Utilized PHP with Laravel to improve backend maintainability and enable smoother development of E-Cash features.