Divya Challa

Java full stack developer @ Johnson & Johnson

About

A seasoned Senior Java Developer with 8 years of experience delivering robust, high-availability web applications and microservices for the FinTech, Insurance, and Healthcare sectors. I thrive in architecting complex, scalable systems from the ground up, with a proven track record in high-stakes environments. My most notable accomplishments include architecting a payment system capable of processing over 3 billion daily transactions and implementing advanced fraud detection systems that reduced fraudulent activity by 66%. These experiences have honed my ability to translate complex business requirements into secure, efficient, and maintainable code. My expertise covers the full software development lifecycle, from back-end development with Java, Spring Boot, and Kafka to front-end implementation with React and Angular. I am proficient in deploying and managing scalable applications on cloud platforms like AWS using containerization (Docker, Kubernetes) and CI/CD pipelines to accelerate development and ensure reliability.

Country

City

United States

Industry

Financial Services

Skill

FinTech, Payment Systems, Spring AI, Payment Card Industry Data Security Standard (PCI DSS), hibernate, Kubernetes, MongoDB, type script, Aws, Node.js, CRUD Operations, WAR Files, Apache Tomcat, Test-Driven Development, SVN, Code Reviews, Client-Side Validation, Form Validation, Server Log Analysis, Bug Fixing

Experience

Java full stack developer

Johnson & Johnson

2023-8 - Present · 3 yrs 2 mos

New Brunswick, NJ

Responsible for developing and maintaining critical enterprise applications. I engineer scalable RESTful microservices using Spring Boot and build responsive, component-based user interfaces with React and TypeScript. My role involves implementing secure authentication flows with OAuth 2.0 and deploying containerized applications to AWS cloud infrastructure.

Senior Java Developer

Bank of America

2022-5 - 2023-7 · 1 yr 3 mos

Charlotte, NC

Developed and maintained enterprise-grade J2EE applications for core banking functions. I played a key role in modernizing legacy systems by migrating business logic to a microservices-based architecture using Spring Boot. Containerized Java applications using Docker and orchestrated deployments with Kubernetes (EKS), significantly improving application scalability and deployment velocity.

Java Developer

State Farm Insurance Agency

2019-12 - 2022-4 · 2 yrs 5 mos

Bloomington, Illinois, United States

As a key member of the payments innovation team, I delivered solutions for a high-volume financial platform. My contributions were instrumental in projects that successfully secured $300 million in Series A funding. Architected a high-capacity payment system designed to handle over 3 billion daily transactions, supporting card, PIN, and UPI payments. Engineered and deployed cutting-edge fraud prevention systems using Spring Boot and Spring AI, resulting in a 66% reduction in fraudulent activities. Designed and managed cloud infrastructure on AWS, utilizing services like EKS, EC2, S3, and Lambda for a highly available and fault-tolerant architecture. Managed Hardware Security Modules (HSM) for secure PIN translation in POS transactions, ensuring compliance with PCI standards. Utilized Kafka for an event-driven payment orchestration system, ensuring reliable and efficient transaction processing.

Software Engineer

Apptmyz

2017-6 - 2019-8 · 2 yrs 3 mos

India

Developed a security-focused, OWASP-compliant issue tracking system for an internal banking client, enhancing their security posture. Engineered and integrated SMTP and OTP modules using AWS SNS and SQS, achieving a 40% cost reduction through optimized resend logic. Integrated APIGEE for comprehensive API lifecycle management, security policy enforcement, and monitoring.