• Developed and maintained backend systems using Node.js as the primary technology stack, utilizingExpress.js as the web framework.• Implemented and optimized RESTful APIs, ensuring efficient data retrieval and manipulation, andadhering to industry best practices for security and scalability.• Leveraged the Knex.js query builder to interact with a MySQL database, ensuring efficient and reliabledata storage and retrieval.• Utilized Objection.js, an ORM (Object-Relational Mapping) library, to simplify database interactionsand enhance code maintainability.• Integrated GraphQL into the existing backend infrastructure, allowing for more flexible and efficientdata querying and manipulation.• Collaborated with the front-end development team to design and implement API contracts and ensuresmooth communication between the front-end and backend systems.

• Developed a comprehensive CRM system using Java Spring as the backend technology, ensuringefficient data storage, retrieval, and manipulation.• Utilized Spring MVC framework to build robust and scalable RESTful APIs, enabling seamlesscommunication between the backend and frontend systems.• Implemented user authentication and authorization mechanisms using Spring Security, ensuringsecure access to sensitive data and functionalities.• Integrated Jasper Reports, a powerful reporting engine, to generate dynamic and customizable reportsfor client information and analysis.• Collaborated with stakeholders to gather requirements, design database schemas, and implementdata models, ensuring accurate and relevant data representation.