ak.Ajay KumarSoftware engineer
Resume (PDF, opens in a new tab)

+ ENGINEERING IN MOTION

Hi, I’m Ajay Kumar.

Thoughtful
engineering.
Dependable
software.

Senior Associate Software Engineer
at Oracle

Software engineer with 6+ years of experience building enterprise applications across healthcare and insurance — with Java, microservices, cloud technologies, and Generative AI.

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  • Java
  • Spring Boot
  • Microservices
  • OCI / AWS
  • GenAI
A PRACTICE OF CONNECTING THINGS[ 01 / 03 ]
Engineering in motion An isometric sculpture of connected software services, an API gateway, and a database. A conceptual illustration of software engineering. 01 — SYSTEMSIN BALANCE API GATEWAYSERVICESDATA
ServicesConnectionsData
A system, in perspective.

Jharkhand, India

Explore selected work CODE. CONNECT. REFINE.

01 / PROFESSIONAL EXPERIENCE

Built on experience.
Refined in practice.

Enterprise software across healthcare and insurance.
Backend systems, cloud integrations, and measurable improvements.

Oracle

Healthcare · Revenue Cycle

Role tenure

October 2023 — Present

Senior Associate Software Engineer

Current

Java, Spring Boot, and Micronaut microservices for Oracle Health Revenue Cycle applications.

  • Built Java, Spring Boot, and Micronaut microservices for critical Oracle Health Revenue Cycle workflows.
  • Implemented 20+ secure REST APIs and OCI Object Storage integrations, improving operational efficiency by 35%.
  • Contributed to Intelligent Prior Authorization (IPA), reducing manual intervention by 50% for providers and payers.
  • Reduced average API response latency by 40% through refactoring, caching, and query tuning.
  • Integrated Oracle Health applications with OHPAC through Millennium Proxy and Cloud.Next.
  • Automated four Revenue Cycle workflows, reducing manual effort by 60% and doubling processing speed.
  • Led the design and development of a Performance & Metrics Dashboard covering 25+ operational metrics and KPIs.
  • Raised automated test coverage above 85%; architecture reviews and production support helped reduce defects by 30% and MTTR by 50%.
  • Java
  • Spring Boot
  • Micronaut
  • OCI
  • JUnit / Mockito

Cerner Corporation

Healthcare · Soarian Financial

Role tenure

June 2022 — September 2023

Software Engineer II

Enterprise healthcare applications, API development, and React-based modernization.

  • Optimized Soarian Financial queries to improve response times for 100K+ healthcare users.
  • Developed React.js, Spring Boot, and microservices features supporting 200K+ daily requests with 99.9% availability.
  • Designed RESTful APIs and backend services for healthcare application workflows.
  • Migrated legacy interfaces to React, reducing maintenance effort by 30%.
  • Reviewed code, reinforced coding standards, and mentored engineers, reducing production defects by 30%.
  • React.js
  • Spring Boot
  • Microservices
  • REST APIs

Tata Consultancy Services

Insurance · Pensions & annuities

Role tenure

September 2019 — June 2022

System Engineer

Java and Spring applications supporting pension and annuity services for a leading UK insurance provider.

  • Developed Java/J2EE, Spring Framework, and microservices applications for UK pension and annuity services.
  • Delivered 20+ enhancements and defect fixes across the software development lifecycle.
  • Designed and optimized PL/SQL procedures and queries for efficient data processing.
  • Resolved 100+ production and application defects through DevPlus.
  • Collaborated across distributed teams on code reviews, deployments, and knowledge transfer.
  • Java / J2EE
  • Spring
  • PL/SQL
  • DevPlus

02 / SELECTED WORK

Ideas made tangible.

A look back at college projects.
Web experiences, a mobile app, and an exam portal.

03 / TECHNICAL TOOLKIT

The tools behind
the thinking.

Java and microservices at the core.
Cloud platforms, system design, and AI-powered solutions.

01 / Core systems

Backend engineering

  • Spring Boot
  • Spring MVC
  • Spring JDBC
  • Spring AOP
  • Hibernate/JPA
  • Micronaut
  • RESTful APIs
  • Microservices
02 / Cloud delivery

Cloud & DevOps

  • Oracle Cloud Infrastructure (OCI)
  • Amazon Web Services (AWS)
  • Docker
  • Kubernetes
  • Oracle Kubernetes Engine (OKE)
  • Jenkins
  • Grafana
03 / Intelligent applications

AI & GenAI

  • Spring AI
  • Large Language Models (LLMs)
  • AI Agents
  • Prompt Engineering
  • GPT
  • Gemini
  • Claude
Languages, architecture, data, testing & toolsExplore toolkitClose toolkit

Programming Languages

  • Java
  • JavaScript
  • Kotlin
  • Python
  • C

Frontend Technologies

  • React.js
  • Redux
  • Node.js
  • HTML5
  • CSS3
  • Bootstrap

Architecture & Design

  • Microservices Architecture
  • Distributed Systems
  • Event-Driven Architecture
  • System Design (LLD/HLD)
  • Design Patterns

Databases

  • Oracle Database
  • Microsoft SQL Server
  • MySQL
  • MongoDB

Testing & Quality Assurance

  • JUnit
  • Mockito
  • Unit Testing
  • Integration Testing
  • Test-Driven Development (TDD)

Tools & Methodologies

  • Git
  • GitHub
  • AccuRev
  • JIRA
  • Crucible
  • IntelliJ IDEA
  • Eclipse IDE
  • Postman
  • Oracle SQL Developer
  • PL/SQL Developer

Core Computer Science Fundamentals

  • Data Structures & Algorithms
  • Object-Oriented Programming (OOP)
  • SOLID Principles
  • Database Management Systems (DBMS)
  • Software Troubleshooting & Debugging
A CURIOUS MIND.
A PRACTICAL APPROACH.
AJAY KUMAR

Always learning. Better together.

04 / BEYOND THE CODE

Curiosity is part
of the process.

I’m a software engineer with 6+ years of experience building enterprise applications across healthcare and insurance. My work combines Java, Spring Boot, microservices, and distributed systems with a foundation in data structures, algorithms, and system design.

At Oracle, I develop Revenue Cycle applications, cloud integrations, and workflow automation. My experience includes performance optimization, architecture reviews, automated testing, and production support, alongside cloud-native development with OCI and AWS.

More about my approach

Before Oracle, I worked at Cerner Corporation on healthcare applications and React-based modernization, and at Tata Consultancy Services on pension and annuity services. I also work with Generative AI and LLM-powered solutions, including Spring AI, AI agents, and prompt engineering.

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CERTIFICATIONS

05 / EDUCATION

Where it started.

GRADUATED 2019

B.Tech

Chaibasa Engineering College

8.49 CGPA

Earlier education
2014

Class 12

St Columba’s College, Hazaribagh

74%

2012

Class 10

R.K.V High School, Bagodar

82.4%

06 / START A CONVERSATION

Good software
starts with
a conversation.

Have a role focused on enterprise software, cloud services, or AI-powered applications? I’d like to hear about it.

LinkedIn (opens in a new tab)GitHub (opens in a new tab)+91-7992462208HTML resume

Jharkhand, India

A quick introduction

Tell me a little about what you have in mind.

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