Summary
Overview
Work History
Education
Skills
Websites
Certification
Technical Skills
Personal Information
Timeline
Generic

Diwakar Reddy Karna

Java Full-Stack Developer
Irving,TX

Summary

Senior Java Full-Stack Developer with 5 years building cloud-native Spring Boot micro-services and event-driven platforms across aviation, fintech, and healthcare domains. Deep experience automating delivery on AWS with DockerJenkins CI/CD, scaling Apache Kafka streams into the millions of events per second, and tuning relational data stores (PostgreSQL, Oracle, MySQL) via Hibernate/JPA. Strengths include hardening services with OAuth2/JWT, RBAC, Spring Vault, driving observability through ELK and CloudWatch, and crafting React (TypeScript)/ Angular dashboards and Thymeleaf portals that turn data into action. Led monolith-to-micro-service migrations that cut release cycles 40% while meeting strict HIPAA, PCI, and airline-operations SLAs in Agile/Scrum environments.

Overview

6
6
years of professional experience
1
1
Certification
2
2
years of post-secondary education

Work History

Java Full-Stack Developer

UNITED AIRLINES
Irving, TX
06.2024 - Current
  • Engineered Spring Boot RESTful APIs for real-time flight scheduling and fare search, tuning PostgreSQL partitions/indexes for 50 K+ peak-hour bookings holding P95 latency < 50 ms and boosting performance 40%.
  • Reduced data inconsistencies 45% by adding a validation layer to Apache Kafka streams, eliminating three top crash causes.
  • Secured services with Spring Security OAuth2/JWT and RBAC, sustaining zero unauthorized-access incidents.
  • Containerized microservices with Docker-Jenkins on Amazon EC2, externalized configuration with Spring Cloud Config, and wired health checks to Actuator & CloudWatch.
  • Leveraged AWS S3 and Redis/EhCache to cut DB load on static look-ups; stored tickets and boarding passes with lifecycle controls.
  • Spearheaded development of real-time flight-tracking dashboards using React JS and Thymeleaf, leading to a 30% annual decrease in lost-luggage claims and maintaining 100% JUnit/Mockito test coverage.
  • Refactored WebSphere services into Eureka-registered Docker microservices, boosting scalability 40%.
  • Authored Swagger/OpenAPI docs and resolved P1/P2 defects during flight-operation cutovers.
  • Led peer GitLab code-review sessions, enforcing SonarQube gates and merge-request checklists that cut post-release defects 15%.
  • Facilitate daily run-of-show huddles with dispatch, baggage and DevSecOps leads, turning portal metrics into next-day backlog items and clearing P1 issues within SLA.
  • Tech Stack: Java 17, Spring Boot, Spring Cloud, Kafka, PostgreSQL, AWS S3, Swagger, Docker, Jenkins, Git, JUnit 5, Thymeleaf

Java Full-Stack Developer

BARCLAYS
Bengaluru, KA
06.2021 - 07.2023
  • Launched a Spring Boot onboarding/KYC micro-platform, integrating core banking via REST, OAuth2 & JWT, and storing docs in AWS S3 with pre-signed URLs.
  • Re-tuned Oracle with JPA/Hibernate and PL-SQL indexing, cutting query latency 35%.
  • Integrated Kafka transaction alerts with fraud-scoring models, improving fraud detection accuracy 8% and reducing manual review workload 25 hours weekly.
  • Forged a role-based analytics console using Thymeleaf and Bootstrap, visualising real-time transaction heat-maps for eight risk analysts.
  • Engineered a global exception-handling framework with standardized JSON errors, Log4j trace-ID enrichment and ELK correlation, cutting production-issue triage time 35%.
  • Hardened Docker-Jenkins pipelines (SonarQube gates, Git-based image promotion) and held 90%+ test coverage, reducing release cadence from quarterly to bi-weekly.
  • Co-presented anomaly-trend briefings to Compliance and C-level risk committees, turning insights into new AML controls.
  • Automated Spring Batch settlements and ELK dashboards, cutting P1 mean-time-to-resolve 40%.
  • Tech Stack: Java 11, Spring Boot, Spring MVC, Spring Security, REST API, Hibernate, Oracle DB, Apache Kafka, Docker, Jenkins, JIRA, AWS S3, Swagger, Thymeleaf, Angular/AngularJS (basic), Log4j, JUnit 5, Mockito, Git

Software Engineer

KAISER PERMANENTE
Bengaluru, KA
06.2019 - 05.2021
  • Delivered appointment-scheduling, lab-result, and prescription-renewal modules in Spring MVC / Java 8 with responsive JSP-Bootstrap-JavaScript UIs, cutting clinician task time 30%.
  • Built HIPAA-compliant REST APIs with encryption and row-level filters, sustaining 99.99% data-security uptime.
  • Optimised MySQL with Hibernate and SQL / PL-SQL indexing, slicing query latency 60%.
  • Automated patient-communication workflows with Spring Scheduler, sending appointment reminders and lab-result notifications; reduced no-show appointments 15% and lifted on-time prescription pickups 20%.
  • Built an on-demand PDF service with iText that generates lab reports and billing summaries, eliminating manual document creation and saving support staff 20 hours per week.
  • Led the team's adoption of Swagger docs, raising API-documentation quality 60% and speeding onboarding across three teams.
  • Migrated high-traffic modules to Spring Boot, adding Log4j trace-ID logging and ELK dashboards.
  • Hosted HIPAA-logging workshops and delivered a shared Postman/Newman regression suite, shrinking release signoff cycles to a few hours.
  • Tech Stack: Java 8, Spring MVC, Spring Boot, Hibernate, MySQL, REST API, SOAP Web Services, JSP, Servlets, JavaScript, Bootstrap, JUnit 4, Maven, Apache Tomcat, JIRA, Log4j, Git

Education

Master of Science - Computer & Information Science

Southern Arkansas University
08.2023 - 05.2025

Skills

  • Java 8-17
  • JavaScript (ES6)
  • TypeScript
  • SQL
  • C/C
  • HTML5
  • CSS3
  • Spring Boot
  • Spring MVC
  • Spring Security (OAuth2/JWT)
  • Spring Cloud (Config, Eureka, Feign)
  • Spring Data JPA
  • Hibernate
  • REST/SOAP
  • Reactjs (TypeScript)
  • Angular 14/JS
  • Thymeleaf
  • JSP/Servlets
  • Bootstrap
  • JQuery
  • AWS (EC2, S3, Lambda, RDS, IAM, CloudWatch)
  • Azure
  • Docker/Compose
  • Kubernetes/EKS
  • Jenkins
  • GitLab CI
  • SonarQube
  • Linux (Ubuntu/CentOS)
  • PostgreSQL
  • Oracle RAC/PL-SQL
  • MySQL
  • MongoDB
  • SQL Server
  • Apache Kafka
  • RabbitMQ
  • ELK Stack
  • Maven
  • Gradle
  • Git (GitHub/GitLab/Bitbucket)
  • Nexus
  • JUnit 4/5
  • Mockito
  • AssertJ
  • TestNG
  • PowerMock
  • Postman
  • SoapUI
  • Swagger UI/OpenAPI
  • Quartz
  • Spring Batch
  • Cron Jobs
  • Log4j
  • SLF4J
  • Agile/Scrum
  • TDD
  • SDLC
  • JIRA
  • Confluence
  • Trello
  • SOLID/OOP
  • UML & GoF Patterns

Certification

AWS Certified Developer - Associate, Professional Certificate

Technical Skills

Java 8-17, JavaScript (ES6+), TypeScript, SQL, C/C++, HTML5, CSS3, Spring Boot, Spring MVC, Spring Security (OAuth2/JWT), Spring Cloud (Config, Eureka, Feign), Spring Data JPA, Hibernate, REST/SOAP, React.js (TypeScript), Angular 14/JS, Thymeleaf, JSP/Servlets, Bootstrap, jQuery, AWS (EC2, S3, Lambda, RDS, IAM, CloudWatch), Azure, Docker/Compose, Kubernetes/EKS, Jenkins, GitLab CI, SonarQube, Linux (Ubuntu/CentOS), PostgreSQL, Oracle RAC/PL-SQL, MySQL, MongoDB, SQL Server, Apache Kafka, RabbitMQ, ELK Stack, Maven, Gradle, Git (GitHub/GitLab/Bitbucket), Nexus, JUnit 4/5, Mockito, AssertJ, TestNG, PowerMock, Postman, SoapUI, Swagger UI/OpenAPI, Quartz, Spring Batch, Cron Jobs, Log4j, SLF4J, Agile/Scrum, TDD, SDLC, JIRA, Confluence, Trello, SOLID/OOP, UML & GoF Patterns

Personal Information

JAVA FULL-STACK DEVELOPER

Timeline

Java Full-Stack Developer

UNITED AIRLINES
06.2024 - Current

Master of Science - Computer & Information Science

Southern Arkansas University
08.2023 - 05.2025

Java Full-Stack Developer

BARCLAYS
06.2021 - 07.2023

Software Engineer

KAISER PERMANENTE
06.2019 - 05.2021

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Diwakar Reddy KarnaJava Full-Stack Developer