Full-Stack Java Developer with 5+ Years Experience

Praveen kumar Muddunur

Full Stack Java Developer

Email : ******************@*****.*** PH : 203-***-****

PROFESSIONAL SUMMARY

Over 5+ years of professional experience as a Full Stack and Java/J2EE Developer delivering enterprise applications across healthcare, financial services, and banking domains.

Strong expertise in designing and developing full-stack applications using Java 8/11/17, Spring Boot, Spring MVC, Hibernate/JPA, and Angular.

Extensive experience in building RESTful APIs and microservices architectures with secure, scalable, and high-performance backend systems.

Hands-on experience with modern UI technologies including Angular, TypeScript, HTML5, CSS3, Bootstrap, and JavaScript.

Proficient in implementing Spring Security with OAuth2 and JWT for authentication and role-based authorization.

Experience working with relational and NoSQL databases including Oracle, PostgreSQL, Cassandra, and MongoDB.

● Designed scalable, fault-tolerant microservices following industry best practices

● Improved application performance by optimizing SQL queries and reducing response time.

● Actively participated in code reviews and knowledge-sharing sessions

● Worked on production deployments, monitoring, and post-release support.

Strong exposure to CI/CD pipelines using Jenkins, Git, Docker, and Kubernetes for automated build and deployment.

Experience working with AWS and Microsoft Azure cloud platforms using Infrastructure as Code tools such as Terraform.

Well-versed in Agile Scrum methodology and full Software Development Life Cycle (SDLC).

Proven ability to collaborate with cross-functional teams to deliver reliable, compliant, and scalable enterprise solutions.

TECHNICAL SKILLS:

Web Technologies

HTML5, CSS3, Bootstrap, JavaScript, TypeScript, Angular, AJAX

Java/J2EE Technologies

Java 8/11/17, J2EE, Servlets, JSP

Frameworks

Spring Boot, Spring MVC, Spring Security, Spring Data JPA, Hibernate

Microservices& Integration

RESTful Web Services, Kafka, JMS, OAuth2, JWT

Database Technologies

Oracle, PostgreSQL, Cassandra, MongoDB, MySQL,SQL

Cloud & DevOps

AWS (EC2, ECS, EKS, RDS, S3, IAM, CloudWatch), Microsoft Azure, Docker, Kubernetes, Terraform

Build & CI/CD Tools

Jenkins, Maven, Git

Testing & Logging

JUnit, Mockito, Log4J, SLF4J, Splunk, Kibana

Methodologies

Agile Scrum, SDLC

Protocols

HTTP/HTTPS, TCP/IP

PROFESSIONAL EXPERIENCE:

Client: UnitedHealth Group, Minnetonka, MN April 2025 – Present

Role: Full Stack Developer

Description: UnitedHealth Group is a leading healthcare and health services organization that delivers technology-driven solutions to improve patient outcomes and operational efficiency. The application supports internal healthcare platforms for member data management, claims processing, eligibility workflows, and secure integrations with downstream systems while ensuring compliance with healthcare regulations.

Responsibilities:

Participated in Agile Scrum ceremonies including sprint planning, daily stand-ups, sprint reviews, and retrospectives.

Designed and developed full-stack healthcare applications using Java 17, Spring Boot, and Angular.

Built RESTful APIs using Spring Boot and Spring MVC for secure data exchange between frontend and backend systems.

Implemented microservices architecture to support scalable healthcare workflows.

Developed responsive UI components using Angular, TypeScript, HTML5, CSS3, and Bootstrap.

Integrated frontend applications with backend services using REST APIs (GET, POST, PUT, DELETE).

Implemented Spring Security with OAuth2 and JWT to protect sensitive healthcare data.

Used Hibernate/JPA for ORM mapping and optimized database interactions with Oracle and PostgreSQL.

Applied Java 8–17 features such as Streams and Lambda expressions for performance optimization.

Implemented Kafka producers and consumers for asynchronous event processing.

Implemented Spring Cloud Gateway for centralized routing and security.

Enhanced application performance by leveraging caching mechanisms.

Integrated downstream systems using Kafka for event-driven communication.

Developed reusable Angular components to improve UI consistency.

Containerized applications using Docker and deployed microservices to AWS environments.

Built and maintained CI/CD pipelines using Jenkins for automated builds and deployments.

Used Terraform to provision and manage AWS infrastructure.

Implemented logging and monitoring using Splunk, CloudWatch, Kibana, and Dynatrace.

Collaborated with QA, DevOps, and business teams to deliver compliant healthcare solutions.

Environment: Java 8/11/17, J2EE, Spring Boot, Spring MVC, Spring Security, Hibernate, REST APIs, Angular, Kafka, Jenkins, Git, Docker, Kubernetes, Terraform, AWS, Oracle, PostgreSQL, Maven, JUnit, Agile Scrum.

Client: Fidelity Investments, Jersey City, NJ March 2024 – March 2025

Role: Full Stack Engineer

Description: Fidelity Investments is a financial services organization providing investment management, retirement planning, and brokerage solutions. The application supported internal investment platforms for account management, advisor workflows, secure document processing, and integration with downstream financial systems.

Responsibilities:

Worked as a Full Stack Engineer on enterprise investment management applications.

Participated in all phases of the Software Development Life Cycle (SDLC).

Migrated legacy EJB-based applications to Spring Boot microservices architecture.

Designed and developed RESTful services using Spring Boot and Spring MVC.

Implemented API versioning strategies to support backward compatibility.

Integrated AWS Lambda for lightweight backend processing.

Improved CI/CD pipelines by adding automated test execution.

Used SonarQube to identify and fix code quality issues.

Worked closely with business analysts to translate financial requirements into technical solutions.

Developed frontend components using Angular for advisor-facing workflows.

Integrated frontend applications with backend services using REST APIs and JSON payloads.

Implemented Spring Security for authentication and role-based authorization.

Used Java 11 and Java 17 features including Streams and Lambdas.

Developed unit and integration tests using JUnit and Mockito.

Worked with PostgreSQL and Cassandra for data persistence and performance tuning.

Automated CI/CD pipelines using Jenkins.

Deployed applications using Docker and Kubernetes/OpenShift.

Used Terraform and AWS CloudFormation for infrastructure automation.

Managed AWS services including EC2, RDS, IAM, and Lambda.

Environment: Java 11/17, J2EE, Spring Boot, Spring MVC, Spring Security, Hibernate, REST APIs, Angular, PostgreSQL, Cassandra, Jenkins, Git, Docker, Kubernetes, Terraform, AWS, Maven, JUnit, Agile Scrum.

Client: HDFC Financial Bank, Mumbai, India June 2020 – July 2023

Role: Java Developer

Description: HDFC Bank is a leading financial institution providing retail and corporate banking services. The application supported core banking operations including transaction processing, customer onboarding, document generation, and secure integration with internal and external systems.

Responsibilities:

Worked as a Java/J2EE Developer on enterprise banking applications.

Followed Agile Scrum methodology for iterative development.

Developed backend services using Java, Spring Boot, Spring MVC, and Hibernate/JPA.

Designed and implemented RESTful microservices for banking workflows.

Implemented multithreaded processing for high-volume banking transactions.

Designed REST APIs for customer onboarding and account management.

Performed database migrations with minimal downtime.

Assisted junior developers with technical guidance and best practices.

Supported UAT and production environments.

Implemented layered architecture separating presentation, business, and persistence layers.

Configured Spring Beans and dependency injection using Spring IOC.

Developed Hibernate entity mappings and optimized SQL queries.

Implemented OAuth2-based authentication for secure API communication.

Migrated applications and databases to Microsoft Azure.

Integrated applications with Azure services including App Services, Virtual Machines, and Azure AD.

Implemented JMS-based asynchronous processing using MQ Series.

Developed multithreaded backend components for high-volume transaction handling.

Assisted with CI/CD automation using Jenkins.

Environment: Java, J2EE, Spring Boot, Spring MVC, Hibernate, REST APIs, Angular, OAuth2, JMS, Jenkins, Git, Azure, Oracle, SQL Server, Maven, JUnit, Agile Scrum.

Educational Details:

Masters in Computer Science from University of Bridgeport from September 2023 to May 2025

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