Full-Stack Developer | Java Spring Boot + React.js | SaaS | REST APIs | JWT | MySQL | MongoDB | Clean Code | On-Time Delivery |

I am Rahul Kumar, a Computer Science graduate and a Full-Stack Developer specializing in building scalable, real-world SaaS applications using Java Spring Boot and React.js.
I have hands-on experience developing enterprise-level systems, including multi-tenant SaaS platforms, e-commerce applications, and secure authentication systems. I hold a Pre-Placement Offer (PPO) — which reflects the quality and industry relevance of my work.
I focus on delivering clean, maintainable, and high-performance solutions that solve real business problems.
Services Offered:
— Full-Stack Web Development (Spring Boot + React.js)
— REST API Design & Third-Party API Integration
— Secure Authentication (JWT, RBAC — Permission-Based Authorization)
— Scalable Backend Systems & Microservices Architecture
— Responsive UI Development (React.js, Tailwind CSS, HTML5, CSS3)
— Database Design & Optimization (MySQL, PostgreSQL, MongoDB)
— SaaS Platforms, Admin Dashboards, E-Commerce Systems
— Bug Fixing, Code Optimization & Performance Improvements
Projects Delivered:
— Multi-Tenant SaaS POS & Inventory System (database performance improved by 40%)
— SaaS Hotel Management Platform (Microservices architecture)
— Aadhaar e-KYC Verification System (real-time processing under 2 seconds)
— Full-Stack E-Commerce Application (Redux Toolkit + Spring Boot)
— Smart Contact Manager with secure authentication & CRUD APIs
Tech Stack:
Java | Spring Boot | Spring Security | Hibernate | JPA | React.js | Redux Toolkit | REST APIs | JWT | RBAC | MySQL | PostgreSQL | MongoDB | Docker | Git | Tailwind CSS | HTML5 | CSS3
Certifications:
— Programming in Java — NPTEL (IIT Certified)
— Java Full Stack Development — Udemy
I am committed to writing clean code, meeting deadlines, and delivering reliable solutions. I aim to build long-term professional relationships through consistent quality and clear communication.
Send a message — let's discuss your project today.

Work Terms

Availability: Full-time, 40+ hours per week. Available across IST and flexible for international time zones including EST, CST, and GMT.
Communication: I provide daily or milestone-based updates on project progress. I respond to messages within a few hours during working hours.
Project Approach: Every project begins with a detailed discussion of requirements, timelines, and deliverables before work starts. I share progress regularly and welcome feedback at every stage.
Revisions: Reasonable revisions are included until the deliverable matches the agreed requirements. Client satisfaction is the final goal.
Payment: I prefer milestone-based payments for fixed-price projects to ensure transparency and trust on both sides.
Preferred Projects: Full-stack web applications, REST API development, SaaS platforms, e-commerce systems, admin dashboards, and backend services.
Tools Used for Collaboration: GitHub (code sharing & version control), Postman (API documentation), Google Meet or Zoom (calls), and any project management tool preferred by the client.
I bring professionalism, clean code, and on-time delivery to every engagement. Let's build something reliable together.