Arnab Mandal

MERN Stack Full Stack Developer with experience of building scalable, high-performance web applications using React.js, Node.js, Express.js, and MongoDB. Proven expertise in RESTful API design, state management, authentication (JWT), performance optimization, and end-to-end application delivery.

Full Stack Developer - Resourcedekho - India

(2023-02)

• Developed, tested, and deployed full-stack web applications using the MERN stack, serving 1,000+ daily active users.
• Built reusable and responsive UI components in React.js using Hooks and Context API, improving frontend maintainability.
• Designed MongoDB schemas using Mongoose, optimized queries and indexes, and reduced API response times by 40%.
• Led the end-to-end development of the ATS (Applicant Tracking System) Score feature, building both backend logic and frontend dashboards for resume analysis and candidate scoring.
• Architected and implemented core ATS scoring algorithms to evaluate resumes based on skills, experience, and keyword matching, improving recruitment workflow efficiency.
• Took ownership of core project modules, independently handling feature development, integration, and deployment.
• Mentored junior developers and assisted team members in debugging, API integration, and frontend development.
• Collaborated closely with product managers, designers, and QA teams in Agile sprints, contributing to sprint planning and technical decision-making.
• Implemented secure authentication and authorization using JWT and role-based access control.

Programmer Analyst Trainee - Cognizant - India

(2021-08 - 2022-05)

• Worked on enterprise-grade applications with strict performance, scalability, and reliability requirements.
• Fixed backend and frontend defects, reducing production issues by 30%.
• Participated in CI/CD pipelines, UAT cycles, and production deployments.
• Collaborated with cross-functional teams to deliver high-quality releases on schedule.
• Created technical documentation and support runbooks to improve maintainability.

B.Tech - Computer Science and Engineering - Lovely Professional University (2017 - 2021) Punjab, India