Rahul.K
Core Philosophy

Engineering IdeasIntoReliable Systems

Rahul Kumar

Rahul Kumar · Software Engineer

BIOGRAPHY

I'm Rahul Kumar, a Computer Science graduate (B.Tech – 7.53 CGPA) from Netaji Subhash Engineering College. I combine strong problem-solving skills (450+ DSA problems on LeetCode & GfG)with hands-on experience in building scalablefull-stack applications using modern technologies.

I specialize in designing clean, efficient, and scalable systems—ranging fromMERN applications toSpring Boot microservices with real-time event flows using Kafka, Redis caching, and optimized SQL/NoSQL database structures.

My technical arsenal includes:
  • Frontend: React.js, Tailwind CSS, Bootstrap
  • Backend: Node.js, Express, REST APIs, Java & Spring Boot (Microservices)
  • Databases: MongoDB, MySQL, SQL, NoSQL
  • Languages: Java, JavaScript, C++
  • Tools & Concepts: Git & GitHub, Postman, CI/CD, Authentication & Authorization, System Design, OOP

I am actively looking forentry-level developer roles where I can apply my technical knowledge, contribute to real-world projects, and grow under experienced mentors. My blend ofanalytical thinking (from DSA and platform problem-solving) andpractical development experience across diverse projects makes me ready to deliver value from day one.

20+

Projects Completed

800+

DSA Problems Solved

Skills

Programming Languages

JavaJavaScriptSQL

Backend Development

Spring BootSpring MVCSpring SecuritySpring Data JPAHibernateNode.jsExpress.jsMicroservicesREST APIsJWT AuthenticationRBACSSO (Azure AD)

Frontend Development

React.jsNext.jsHTML5CSS3Tailwind CSSBootstrapjQuery

Databases

MySQLMongoDBRedisPostgreSQL

Cloud & DevOps

AWS (EC2, S3, Lambda, SQS, API Gateway, CloudWatch, IAM)AzureDockerGitHub ActionsCI/CDNginxKubernetes (Basics)

Tools & Platforms

GitGitHubPostmanMavenIntelliJ IDEAVS Code

Core Computer Science

Data Structures & Algorithms (600+ Problems)Object-Oriented Programming (OOP)DBMSOperating SystemComputer NetworksSystem DesignAPI SecurityAuthentication & AuthorizationAgile / Scrum

Education

Bachelor of Technology in Computer Science & Engineering

Netaji Subhash Engineering College, Kolkata

Relevant Coursework: Data Structures & Algorithms, DBMS, Computer Networks, OOPs, Operating Systems, Software Engineering

2022 – 2025
CGPA: 7.53

Diploma in Electrical Engineering

Government Polytechnic College, Muzaffarpur

Developed strong analytical skills through electrical circuit design and power systems coursework

2019 - 2022 | CGPA: 8.04

All India Secondary School Examination (Class X)

Mother's Pride International School, Begusarai (CBSE)

Foundation in mathematics and science that paved way for engineering

2019 | Percentage: 84%

Experience

Assistant System Engineer @ Nexucon Consultancy Services Pvt Ltd

Nov 2025 - Present · On-site · Kolkata, West Bengal, India

  • Developing enterprise-grade backend applications using Java, Spring Boot, Node.js, React.js, MySQL, and MongoDB.
  • Architecting secure RESTful APIs and microservices for Accounting, CRM, and Employee Management Systems, serving complex business workflows.
  • Implementing JWT Authentication, Spring Security, Azure AD SSO, and RBAC to ensure secure, role-based access across enterprise applications.
  • Building financial reporting, taxation, banking reconciliation, workflow automation, and analytics modules while optimizing database performance and scalability.
  • Leveraging Docker, GitHub Actions, and Azure Cloud to streamline CI/CD pipelines and deliver reliable, production-ready deployments.

Backend Development Intern @ NextEdge Labs LLP

Apr 2025 – Oct 2025 · Remote

  • Developed and maintained RESTful APIs using Node.js, Express.js, and MongoDB for production-ready backend services.
  • Designed database schemas, implemented validation middleware, and optimized API performance for scalable applications.
  • Built secure authentication and authorization using JWT, ensuring protected user access and session management.
  • Collaborated with senior developers in an Agile environment, contributing to feature development, bug fixes, code reviews, and Git-based version control.
  • Gained hands-on experience with backend architecture, API integration, error handling, and CI/CD development workflows.

Frontend Development Intern @ Oasis Infobyte

Jul 2023 - Aug 2023 · Remote

  • Created 3 interactive web projects including a temperature converter and todo application
  • Implemented DOM manipulation and event handling for dynamic user experiences
  • Participated in weekly code reviews, improving code quality by 25%
  • Completed student internship program with focus on practical web development skills

Web Development Intern @ CipherByte Technologies

Aug 2023 - Sep 2023 · Remote

  • Developed responsive web interfaces using HTML5, CSS3, and JavaScript that improved user engagement
  • Collaborated on a team project to build a customer feedback portal with form validation
  • Gained hands-on experience with Bootstrap framework and version control using Git
  • Completed training modules on React.js fundamentals and REST API concepts

Academic Projects

2022 - 2025 · Netaji Subhash Engineering College

  • AI Image Generator: MERN stack application with 1000+ generated images
  • Sorting Visualizer: React application demonstrating 5+ algorithms with custom controls
  • E-commerce Platform: Full-stack implementation with cart and product management

Professional Experience

2025 – Present · Full-Stack Development & Backend Engineering

  • Microservices Development: Implemented scalable Spring Boot microservices with Kafka event streaming and Redis caching.
  • Backend API Engineering: Built secure REST APIs in Java, Node.js & Express with JWT-based authentication.
  • Database Design: Designed optimized data models using MongoDB, MySQL, and NoSQL principles for high-performance workloads.
  • Frontend Integration: Developed and integrated responsive React.js UI with backend services and real-time updates.
  • Version Control & Collaboration: Worked with Git, GitHub workflows, code reviews, and CI/CD pipelines.