Harish Kumar
I’m a full stack engineer with 5+ years of experience building and shipping production web applications using React.js, TypeScript, and Node.js/Express, with MongoDB, MySQL, and PostgreSQL.
About
I’m a full stack engineer with 5+ years of experience building and shipping production web applications using React.js, TypeScript, and Node.js/Express, with MongoDB, MySQL, and PostgreSQL. I enjoy owning features end to end—from designing reusable UI components and REST APIs to integrating third-party services and handling role-based access—while keeping quality high through testing, debugging, and secure implementations.
In my day-to-day work, I troubleshoot across the frontend, backend, and database layers to find root causes and deliver stable fixes. I also use AI tools like Claude and ChatGPT to accelerate scaffolding, debugging, refactoring, and documentation, while reviewing and validating everything myself so the final output is dependable.
- 5 years' experience
- Joined November 2026
Industry experience
- Software & Internet
- Professional Services
- Travel & Hospitality
Work experience
Owned and shipped product features end to end across React.js frontends, Node.js/Express.js APIs, and SQL/NoSQL databases, continuing improvements after release. Built responsive, reusable React components using hooks and Redux to maintain UI consistency and speed delivery across modules. Designed and implemented RESTful APIs and integrated internal and third-party services for real-time data exchange. Modeled and optimized PostgreSQL, MySQL, and MongoDB queries for high-volume data such as user activity, bookings, and transactions. Implemented secure JWT authentication and role-based access control for customer, staff, and admin roles. Built admin and internal tools for bookings, listings, and membership packages to reduce operational manual work. Debugged production issues across frontend, backend, and database layers, identifying root causes and shipping stability improvements.
Certifications and awards
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