</> SOFTWARE DEVELOPER

Hi, I'm Nandha
Kishore.

I build scalable, multi-threaded backend applications & REST APIs. Passionate about translating complex logic into real-world productivity solutions using Java, Spring Boot, and PostgreSQL.

View Projects → Resume GitHub
Nandha Kishore KB NK Logo

Chapter I
About Me

I am a Software Developer specializing in core backend technologies. I have demonstrated expertise in Data Structures & Algorithms (DSA), object-oriented programming, and applying standard design patterns to architect robust, multi-tenant enterprise systems.

I actively focus on system design principles, aiming to write clean, maintainable code that scales. Beyond coding, I am an active open-source contributor and a content creator producing educational analyses of self-improvement literature.

Fast Facts

  • Solved 300+ problems on LeetCode and HackerRank.
  • CGPA of 9.19 in B.E. Computer Science and Engineering.
  • Certified in GitHub Foundations and Docker.
  • Open Source enthusiast with multiple clean-code Java projects.

Chapter II
Technical Arsenal

Languages

Java C Python SQL

Technologies

Spring Boot Spring Security Hibernate REST APIs JDBC PostgreSQL SQLite

Tools & DevOps

Git GitHub Docker Postman Maven VS Code

Architecture & Core

Multi-Tenant MVC & DAO Design Patterns DSA & OOPS DBMS & OS

Chapter III
Featured Projects

Architectural blueprints and backend systems engineered for scalability,
security, and performance.

Mini SaaS Billing REST API Architecture

Mini SaaS Billing REST API

Mar 2026 - Jun 2026

JAVA SPRING BOOT POSTGRESQL DOCKER
  • Architected a secure, multi-tenant SaaS REST API utilizing Spring Security for Role-Based Access Control (RBAC) and Hibernate Session Filters to ensure strict data isolation across corporate clients.
  • Optimized system performance and response times by engineering asynchronous background PDF generation (Spring @Async, Thymeleaf) and resolving JPA "N+1" query issues via JOIN FETCH eager loading.
  • Streamlined deployment and database management by automating schema migrations with Flyway and containerizing the PostgreSQL environment using Docker.
Source Code
WealthWise Behavioral Finance Tracker

WealthWise Behavioral Finance Tracker

Jan 2026 - Feb 2026

JAVA SQLITE JDBC MVC ARCHITECTURE
  • Developed a personal finance application to translate wealth-building principles into actionable metrics by tracking and categorizing income streams across functional quadrants.
  • Engineered complex financial algorithms in Java, including a dynamic 'Fastlane Score' for financial independence, Future Value time-to-goal projections, and lifestyle inflation detection.
  • Achieved strong user outcomes during beta testing (15 users), driving a 10x increase in savings rates for highly active users through algorithmic bucket recommendations.
Source Code
Wisdom Journal App

Wisdom Journal & Habit Tracker

Dec 2025 - Jan 2026

JAVA JDBC DAO & MVC SINGLETON PATTERN
  • Developed a productivity application utilizing the MVC architecture and DAO design pattern to track habits, calculate streaks, and maintain daily journals.
  • Engineered custom streak-calculation algorithms that handle dynamic scheduling and a real-time 'Habit Score' algorithm utilizing weighted averages over 30-day historical data.
  • Deployed to 20+ active users, achieving an 85% reported improvement in productivity and successfully tracking user habit streaks exceeding 100 consecutive days.
Source Code

Chapter IV
Education & Certifications

Academic Journey

B.E. in Computer Science and Engineering

Sep 2023 - May 2027

KPR Institute of Engineering and Technology, Coimbatore

CGPA: 9.19

Higher Secondary Education

Jun 2021 - Apr 2023

Einsstein Matric Higher Secondary School, Namakkal

Percentage: 98.5%

Certifications & Interests

GitHub Foundations

Issued by GitHub

Docker For Absolute Beginners

KodeKloud

Project Management

LinkedIn Learning

Content Creator

Producing educational video analyses of self-improvement books.

Expanded architecture diagram