Punith Kumar

Backend Software Engineer with 3.5+ years of experience specializing in Node.js, NestJS, and scalable API development. Proven expertise in building high-performance REST APIs, optimizing SQL & MongoDB queries (improving performance by up to 30%), and designing secure authentication systems using JWT and RBAC. Strong background in microservices architecture, data-intensive applications, and production-grade backend systems supporting web and mobile platforms.

Experienced in designing and implementing scalable microservices and event-driven architectures for high-availability systems. Adept at collaborating in Agile environments, delivering reliable backend solutions with a focus on performance, scalability, and maintainability.

Software Engineer - Doodleblue Innovations Pvt. Ltd. - Chennai

(2022-11 - 2026-03)

• Built and maintained scalable backend services using Node.js and NestJS supporting multiple production applications.
• Optimized SQL and MongoDB queries, improving API response times by ~30%.
• Designed reusable and modular backend components, reducing development effort by ~20% for new features.
• Implemented secure authentication and authorization systems using JWT and RBAC.
• Collaborated in Agile sprint cycles, ensuring timely delivery of high-quality features.
• Worked on production systems handling high-volume data and concurrent users.

Software Engineer - Intern - Doodleblue Innovations Pvt. Ltd. - Chennai

(2022-06 - 2022-11)

• Developed backend modules and proof-of-concept applications using Node.js and MongoDB.
• Designed scalable database schemas for backend systems.
• Assisted in debugging and testing, improving application stability and reliability.
• Recognized for strong problem-solving skills and ownership in deliverables.

Bachelor of Technology - Information Technology - St. Joseph's College of Engineering (2016-07 - 2020-04)