Available for opportunities

Building
enterprise-grade
systems that scale
to millions.

Senior Java Full-Stack Developer with 5+ years of expertise crafting microservices, REST APIs, and cloud-native applications for enterprise clients like United Airlines and Barclays.

Explore Work Download Resume
Developer.java
12345 678910 11121314 
@RestController
public class DiwakarKarna {

  @Value("Full-Stack Dev")
  private String role;

  private List<String> stack = List.of(
    "Java", "Spring Boot",
    "React", "AWS"
  );

  public String buildTheFuture() {
    return "Scalable & Secure";
  }
}
0+ Years Experience
0 Enterprise Clients
50K+ Peak Bookings/Day
99.99% Security Uptime
EXPERIENCE

Where I've Made
an Impact

Building mission-critical systems for Fortune 500 companies

Current Role

United Airlines

Java Full-Stack Developer · Irving, TX Jun 2024 – Present
⚡
Engineered Spring Boot REST APIs handling 50K+ peak-hour bookings with P95 latency under 50ms
📊
Reduced data inconsistencies by 45% via Apache Kafka validation streams
🖥️
Built real-time flight-tracking dashboards in React, cutting lost-luggage claims by 30%
☁️
Deployed AWS Lambda APIs with Cognito & DynamoDB, reducing infra costs by 20%
Spring BootReactPostgreSQLAWS KafkaDockerMongoDBRedis
performance.log
09:14:22 ✓ API Response: 48ms (P95)
09:14:23 ✓ Bookings processed: 2,847
09:14:24 ✓ Kafka events: 12,491 validated
09:14:25 ✓ Cache hit rate: 97.3%
09:14:26 ✓ Active instances: 8/8 healthy
09:14:27 ✓ System status: ALL GREEN
48ms Avg Response
99.9% Uptime
B

Barclays

Java Full-Stack Developer
Jun 2021 – Jul 2023 · Bengaluru, India
  • Cut Oracle query latency by 35% via JPA/Hibernate indexing
  • Achieved 90%+ test coverage with SonarQube quality gates
  • Boosted fraud detection accuracy by 8% via Kafka ML models
  • Accelerated releases from quarterly to bi-weekly with CI/CD
Spring BootAngularOracleAzure KafkaJenkinsELK Stack
KP

Kaiser Permanente

Software Engineer
Jun 2019 – May 2021 · Bengaluru, India
  • Reduced clinician task time by 30% with scheduling modules
  • Maintained 99.99% security uptime for HIPAA-compliant APIs
  • Saved 20+ hrs/week with on-demand PDF generation service
  • Cut no-show appointments by 15% via automated workflows
Java 8Spring MVCJSPBootstrap Log4jELKSwagger
50K+ Peak Bookings ✦ 45% Less Data Errors ✦ 40% Faster Deploys ✦ 0 Security Breaches ✦ 90%+ Test Coverage ✦ 99.99% Uptime ✦ 50K+ Peak Bookings ✦ 45% Less Data Errors ✦ 40% Faster Deploys ✦ 0 Security Breaches ✦ 90%+ Test Coverage ✦ 99.99% Uptime ✦
SKILLS

Technical Expertise

Languages

Java 8/11/17PythonJavaScript ES6+ TypeScriptSQLHTML5 / CSS3

Frameworks & Tools

Spring BootSpring MVCSpring Security Spring CloudHibernate / JPARESTful APIs MicroservicesApache KafkaRabbitMQ

Databases

PostgreSQLMySQLOracle MongoDBRedisDynamoDB

Testing & Monitoring

JUnit 5MockitoSelenium REST AssuredELK StackSplunk Swagger / OpenAPIGit

Frameworks & Libraries

React.js 18+Angular 14+Next.js ReduxMaterial UIBootstrap

Languages

JavaScript ES6+TypeScript HTML5CSS3 / SASS

Cloud Platforms

AWSAzure LambdaS3EC2DynamoDBCognito

DevOps & CI/CD

DockerKubernetesTerraform JenkinsGitHub ActionsGitLab CISonarQube
EDUCATION

Education & Certifications

🎓

Master's in Computer & Information Science

Southern Arkansas University, Magnolia, AR

Class of 2025

AWS Certified Developer – Associate

Amazon Web Services

Issued Jun 2025

Aviatrix Certified Engineer – Multicloud

Aviatrix, Inc.

Issued Feb 2025

Get In Touch.

Have a question or want to work together? I'd love to hear from you.

Phone +1 (940) 843-7695
→
LinkedIn linkedin.com/in/diwakarreddyk11
→
Resume Download PDF Resume
↓

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