Adarsh Kumar

Dynamic Software Developer with a proven track record at Optimiser, specializing in full-stack applications using React.js and Java Spring Boot. Expert in designing REST APIs and enhancing MongoDB performance. Adept at collaborating in Agile teams, driving project success through innovative solutions and effective communication. Passionate about leveraging technology to optimize user experiences.

• 5 Stars in Hackerrank (Problem Solving, Core Java)
• LinkedIn Certified MERN Stack Developer
• Zensar AI & Java Bootcamp | Barclays Job Readiness Program
• Scored 68 percentile in Aon Cocubes Technical Test

CRM System (Optimiser), 07/01/23 - Present

Tech stack: React.js, Spring Boot, Spring Data JPA, RabbitMQ, AWS SQS, MongoDB, AWS (EC2, S3, Lambda), Jenkins, FFmpeg, Video.js, Redis

• Engineered a scalable CRM platform using Spring Boot microservices for modular workflows, dynamic data handling, and log tracking.
• Designed dynamic form & page builders with drag-and-drop UI, integrated deeply with customizable entity-based backends.
• Developed a Google Calendar-style scheduler with Gmail/Outlook sync and appointment booking logic using REST APIs and OAuth2.
• Integrated video processing pipeline using AWS Lambda, S3, FFmpeg to generate HLS segments, and used Video.js for frontend playback.
• Implemented event-driven architecture using RabbitMQ and AWS SQS for field listeners, triggers, and workflow automation.
• Built a responsive frontend using React, Tailwind, and Bootstrap, interacting with Spring Boot APIs via secure endpoints (JWT-auth enabled).
• Tuned MongoDB queries and indexes for performance; set up CI/CD pipelines via Jenkins, and deployed services on AWS EC2.

E-Commerce Platform – TCS 

Duration: August 2021 – July 2023

Tech stack: Spring Boot, Node.js, Express.js, MongoDB, MySQL, Redis, SendGrid, Jenkins, CRED (payment gateway)

• Built and maintained a robust backend for a large-scale e-commerce application using Spring Boot and Node.js hybrid architecture.
• Developed RESTful APIs for catalog, cart, checkout, billing, and order processing, using Spring Data JPA with MySQL for relational data.
• Implemented automated billing and customer notification workflows using Spring Boot Mail Starter and SendGrid integration.
• Migrated legacy Java EE systems to modern Spring Boot microservices with improved performance and maintainability.
• Optimized Redis-based caching layers for cart and session management; contributed to Jenkins CI/CD setup and versioned deployments.
• Maintained ALM system for J&J with Spring Boot backend for software lifecycle tracking, bug reporting, and release planning.
• Participated in Agile ceremonies (daily stand-ups, sprint planning, reviews), performed code reviews and applied clean code principles.

Chat Web Application -

Tech Stack: React.js, Node.js, Socket.IO, JWT, Heroku

• Developed a real-time chat platform supporting 1:1 messaging and chat rooms using Socket.IO for persistent socket communication.
• Implemented JWT-based authentication, user status indicators (online/offline), and hosted the app on Heroku.

Ticket Booking System -

Tech Stack: Spring Boot, Spring Data JPA, MySQL, React.js, JWT, Redis, Swagger, RabbitMQ

• Developed a full-stack ticket booking platform using Spring Boot for backend services and React.js for frontend interfaces.
• Designed a robust relational schema using Spring Data JPA and MySQL to manage users, events, venues, schedules, and ticket reservations.
• Implemented secure user authentication and role-based access control using JWT, with separate workflows for users and admins.
• Created RESTful APIs for seat selection, ticket booking, cancellation, and payment handling, documented using Swagger/OpenAPI.
• Integrated Redis caching for frequently accessed event listings and seat availability to reduce DB load and improve performance.
• Ensured atomicity and data consistency during concurrent bookings using synchronized transactions and optimistic locking.
• Enabled asynchronous notifications (e.g., booking confirmations, reminders) via RabbitMQ-based event-driven architecture.
• Built admin modules for event management, booking analytics, and real-time dashboard for monitoring sales and occupancy.

• Hindi
• English
• Punjabi

Date of Birth: 04.03.1999