Hi, my name is

Dhiraj Kumar.

I build robust backend systems.

Software Engineer at Oracle Health with 3 years of experience. I specialize in designing, developing, and optimizing scalable backend architectures using Java and Spring Boot.

Say Hello!

3+

Years Exp

10k+

App Installs

300+

DSA Solved

8.2

CGPA

01. Professional Journey

Software Developer 1 @ Oracle Health

Oct 2022 — Oct 2025

  • ▹ Maintained healthcare applications for Patient Access (PA) and Soarian Scheduling (S2).
  • ▹ Utilized Spring Boot and SQL Server (OLTP/OLAP) to optimize database handling.
  • ▹ Applied SOLID, KISS, and DRY principles to ensure high-quality, maintainable codebases.

Android Developer @ Tokn Tech

Sept 2021 — Mar 2022

Built production-ready Android apps from scratch using MVVM architecture. Integrated Firebase Auth, Firestore, and Realtime Database for seamless data management.

02. Projects & Impact

Personal Organizer

Task management application with advanced UI/UX and local persistence.

KotlinSQLite

Fasting Tracker

Production-level health app with Firebase integration and analytics.

Android StudioFirebase
View all 10k+ install apps on Play Store →

03. Technical Arsenal

Languages

Java Kotlin SQL DSA

Backend & Cloud

Spring Boot Microservices Kafka Docker AWS/Azure

Tools

Git Jira/CI-CD JUnit Postman

04. Education & Certs

Techno Main Saltlake

B-Tech, Computer Science Engineering

2018 — 2022 | CGPA: 8.2

Microsoft Certified: Azure Fundamentals
Java Programming - IIT Kharagpur (NPTEL)