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I am a Java Developer with 10+ years of enterprise application experience, specializing in Identity and Access Management (IAM) systems, security protocols, and authentication frameworks. I design secure, scalable Java-based applications using OAuth 2.0, OpenID Connect, SAML, JWT, LDAP, and Spring Security, with hands-on experience integrating Okta, Azure AD, and Keycloak for multi-tenant identities. I excel at building RESTful APIs and microservices for identity lifecycle management, RBAC, MFA, and SSO, with strong DevSecOps practices, secure coding, and compliance (HIPAA, PCI-DSS, SOX). I’ve delivered production-grade solutions in hybrid environments, led code reviews, and troubleshooted complex IAM production issues with minimal downtime.…I am a Java Developer with 10+ years of enterprise application experience, specializing in Identity and Access Management (IAM) systems, security protocols, and authentication frameworks. I design secure, scalable Java-based applications using OAuth 2.0, OpenID Connect, SAML, JWT, LDAP, and Spring Security, with hands-on experience integrating Okta, Azure AD, and Keycloak for multi-tenant identities. I excel at building RESTful APIs and microservices for identity lifecycle management, RBAC, MFA, and SSO, with strong DevSecOps practices, secure coding, and compliance (HIPAA, PCI-DSS, SOX). I’ve delivered production-grade solutions in hybrid environments, led code reviews, and troubleshooted complex IAM production issues with minimal downtime.

Sowmya Kaparaboina

Full Stack Developer, Back-End Developer, Front-End Developer, +5

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I am a Java Developer with 10+ years of enterprise application experience, specializing in Identity and Access Management (IAM) systems, security protocols, and authentication frameworks. I design secure, scalable Java-based applications using OAuth 2.0, OpenID Connect, SAML, JWT, LDAP, and Spring Security, with hands-on experience integrating Okta, Azure AD, and Keycloak for multi-tenant identities. I excel at building RESTful APIs and microservices for identity lifecycle management, RBAC, MFA, and SSO, with strong DevSecOps practices, secure coding, and compliance (HIPAA, PCI-DSS, SOX). I’ve delivered production-grade solutions in hybrid environments, led code reviews, and troubleshooted complex IAM production issues with minimal downtime.…I am a Java Developer with 10+ years of enterprise application experience, specializing in Identity and Access Management (IAM) systems, security protocols, and authentication frameworks. I design secure, scalable Java-based applications using OAuth 2.0, OpenID Connect, SAML, JWT, LDAP, and Spring Security, with hands-on experience integrating Okta, Azure AD, and Keycloak for multi-tenant identities. I excel at building RESTful APIs and microservices for identity lifecycle management, RBAC, MFA, and SSO, with strong DevSecOps practices, secure coding, and compliance (HIPAA, PCI-DSS, SOX). I’ve delivered production-grade solutions in hybrid environments, led code reviews, and troubleshooted complex IAM production issues with minimal downtime.

Available to hire

I am a Java Developer with 10+ years of enterprise application experience, specializing in Identity and Access Management (IAM) systems, security protocols, and authentication frameworks. I design secure, scalable Java-based applications using OAuth 2.0, OpenID Connect, SAML, JWT, LDAP, and Spring Security, with hands-on experience integrating Okta, Azure AD, and Keycloak for multi-tenant identities.

I excel at building RESTful APIs and microservices for identity lifecycle management, RBAC, MFA, and SSO, with strong DevSecOps practices, secure coding, and compliance (HIPAA, PCI-DSS, SOX). I’ve delivered production-grade solutions in hybrid environments, led code reviews, and troubleshooted complex IAM production issues with minimal downtime.

Skills

Experience Level

Expert

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Expert

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Intermediate

Language

English

Fluent

Work Experience

Sr. Java Full Stack Developer at ADP

May 1, 2023 - November 4, 2025

Led development of Angular frontends (v14-17) with TypeScript, RxJS, and Angular Material; implemented microservices using Spring Boot 3.x/6 with Java 21; built scalable RESTful and GraphQL APIs; migrated monolithic Struts/JSP apps to microservices; implemented event-driven workflows with Kafka, RabbitMQ, and AWS EventBridge; containerized on AWS EKS; established CI/CD pipelines and IaC with Terraform and CloudFormation; set up comprehensive monitoring.

Sr. Java Full Stack Developer at Fannie Mae (Client)

April 1, 2023 - April 1, 2023

Developed 15+ production Angular apps (v12-15) with widget-based UI libraries; built React SPAs with Redux; implemented JWT-based authentication and RBAC; migrated legacy J2EE/Struts to microservices; designed event-driven workflows with RabbitMQ and Spring Batch; configured service discovery/load balancing with Spring Cloud Netflix; deployed on AKS; integrated Cassandra, CosmosDB, MongoDB; authored CI/CD pipelines (Jenkins/Gradle/Azure DevOps).

Full Stack Java Developer at US Bank

May 1, 2021 - May 1, 2021

Built React-based front ends and RESTful backends with Spring Boot; migrated monoliths to microservices; implemented OAuth2/JWT-based authentication and RBAC; integrated Spring Cloud Netflix OSS for service discovery, load balancing, and API gateway; deployed on AKS; implemented centralized logging with Splunk; developed CI/CD pipelines with Jenkins and Azure DevOps.

Java Developer at Office Depot

August 1, 2019 - August 1, 2019

Designed widget-based UIs with React/Redux and modern front-end tech; built secure RESTful backends with Spring Boot; migrated legacy apps to microservices; containerized with Docker and deployed on AKS; implemented automated CI/CD pipelines with Jenkins; performed load testing and performance optimization.

Software Engineer at YBR Infotech Pvt Ltd

May 1, 2017 - May 1, 2017

Developed enterprise applications using Struts, Spring, and Hibernate; implemented RESTful and SOAP services; built multithreaded components and data access layers; containerized with Docker and deployed using Terraform/AWS; gained experience across J2EE stack and CI/CD.

Sr. Java Full Stack Developer at Fannie Mae

April 1, 2023 - April 1, 2023

Developed 15+ production Angular applications (v12-15) with widget-based UI components, leveraging Angular Material and a design system to deliver fast, reusable, accessible interfaces. Built React SPAs (v16-17) with Redux, enabling 40% faster load times via lazy loading and code splitting. Migrated legacy J2EE/Struts components to microservices with Spring Boot 3.x/6, Spring Cloud Netflix for service discovery, API gateway routing, and circuit breaking. Implemented JWT/OAuth 2.0 and Spring Security for secure, stateless authentication and RBAC. Executed event-driven workflows using Spring AMQP, RabbitMQ, and Dataflow-based batch processing. Deployed microservices on Azure AKS with Docker, managed data across PostgreSQL, MySQL, Cassandra, CosmosDB, and DynamoDB. Established CI/CD pipelines and extensive testing (JUnit, Mockito, Jest, Playwright, Cucumber) and robust logging/monitoring with Splunk, Grafana, and AppDynamics.

Sr. Java Backend Developer at ADP

May 1, 2023 - November 18, 2025

Architected and developed scalable microservices using Java 21, Spring Boot 3.x, and Spring 6, handling 10,000+ requests per minute across mobility and connected-vehicle applications. Implemented loosely coupled, independently deployable services following microservices design patterns and bounded contexts for enterprise scalability and maintainability. Designed REST APIs with versioning/pagination/filtering/rate limiting, and authored OpenAPI specifications for frontend and partner integrations. Developed high-performance backend components in Golang for critical paths to reduce latencies by ~40%. Built secure authentication/authorization flows with OAuth 2.0, JWT, and OpenID Connect; implemented token refresh, RBAC, and multi-tenant API key management with audit logging. Provisioned AWS infrastructure via Terraform (API Gateway, Lambda, EKS, DynamoDB, SQS, SNS) and managed Kubernetes deployments (HPA, blue-green/canary). Implemented event-driven patterns with SQS/SNS and Spring Cloud

Sr. Java Backend Developer at Fannie Mae

April 1, 2023 - April 1, 2023

Led development of 15+ production Angular applications and built secure Spring Boot backends with PostgreSQL/MySQL. Implemented JWT-based authentication, token refresh, and RBAC; designed API contracts with OpenAPI and ensured backward compatibility during migration from monolith to microservices. Architected event-driven pipelines using Spring AMQP with RabbitMQ and Spring Batch for asynchronous processing; implemented DLQ handling and exponential backoff retries. Leveraged Spring Cloud Netflix for service discovery (Eureka) and API gateway routing (Zuul, Ribbon) with Hystrix for resilience. Deployed on Azure AKS with Docker, configured resource management and auto-scaling. Collaborated with product/QA/DevOps to deliver robust cloud-native services and led CI/CD improvements with Jenkins, GitLab CI, and Artifactory. Improved data security and auditability using encryption and access controls; implemented monitoring with CloudWatch/X-Ray and Splunk. Participated in legacy modernization

Java Developer at US Bank

May 1, 2021 - May 1, 2021

Designed widget-based user interfaces with React; built RESTful backends using Spring Boot and migrated legacy monoliths to microservices. Implemented JWT-based authentication and LDAP/SAML SSO integration; leveraged cloud infrastructure (AWS/Azure) with Kubernetes (AKS) and Docker; conducted end-to-end testing with Selenium and Cucumber; enhanced API security with Spring Security and introduced API gateway patterns.