Jatin Singh

MERN Stack Developer with 2+ years of experience designing, developing, and deploying scalable full-stack web applications using MongoDB, Express.js, React.js, and Node.js. Skilled in building secure REST and FHIR APIs, JWT and OAuth 2.0 authentication, third-party integrations (AWS S3, Adobe Acrobat Sign, payment gateways), and Dockerized microservice deployments in Agile teams. Proven track record delivering production healthcare applications end to end.

Associate Software Engineer at Hale HealthCare IT Labs (2024-07 – Present)

• Developed and maintained scalable full-stack healthcare web applications using the MERN stack (MongoDB, Express.js, React.js, Node.js), serving multiple user roles in production.
• Designed and built REST and FHIR APIs in Node.js/Express.js for OpenEMR (EHR) integration, enabling seamless interoperability of patient data across systems.
• Implemented secure authentication and authorization using JWT and OAuth 2.0 with role-based access control (RBAC).
• Integrated Adobe Acrobat Sign for e-signatures, AWS S3 for secure document storage, payment gateways, and transactional email services.
• Optimized MongoDB and MySQL schemas, indexes, and queries, improving API response times and report performance.
• Dockerized backend services to standardize development and deployment environments across the team.
• Collaborated in Agile/Scrum sprints using Jira, participating in sprint planning, code reviews, and estimation.

Software Engineering Intern at Hale HealthCare IT Labs (2023-12 – 2024-06)

• Built responsive frontend interfaces with React.js, Material UI, and reusable component architecture for web and mobile-facing platforms.
• Developed backend REST APIs and database models (MongoDB, MySQL) powering web and mobile applications.
• Integrated frontend components with backend APIs, implementing state management, form validation, and API error handling.
• Performed debugging, unit testing, and performance optimization across the full stack, reducing recurring production bugs.
• Contributed to end-to-end full-stack feature development and bug fixes using Git and Agile workflows.

B.Tech in Information Technology – Kalinga Institute of Industrial Technology (KIIT) (2024)