Rojana K — Software Engineer

Hey hey! 👋🏽 I'm Rojana, a Senior Java Full Stack Developer with 9+ years of hands-on experience crafting enterprise and cloud-native apps using Java(8/11/17/21), Spring Boot, REST APIs, and microservices in banking, healthcare, and retail worlds where reliability really matters. Core Technical Expertise: Backend: Java 8-21, Spring Boot,Hibernate, JPA,OAuth2/JWT, Maven, Gradle Microservices & APIs: Spring Boot, Spring Cloud Gateway/Config, REST, GraphQL, API Gateway Messaging & Streaming: Apache Kafka, RabbitMQ, ActiveMQ, Redis, Pub/Sub Cloud Platforms: AWS (ECS Fargate/EKS, ALB, S3, Lambda, ElastiCache, CloudWatch/X-Ray), Azure (AKS, Key Vault, Cosmos DB, Application Insights, Blob Storage) Databases: PostgreSQL, MySQL, Oracle, MongoDB, Cassandra, DynamoDB Frontend: Angular,React.js, TypeScript, JavaScript, HTML5, CSS3 DevOps & CI/CD: Docker, Kubernetes, Jenkins, GitLab CI/CD, Terraform, Ansible Programming: Java 8/11/17/21, Python, SQL, NoSQL Methodologies: Agile, Scrum, TDD, Microservices Design Patterns AI Tools: Amazon Q, GitHub Copilot, Claude/ChatGPT (code review & generation), AI-assisted debugging & documentation Key Achievements: ✓ Spearheaded modernization of legacy systems and seamless microservices migrations ✓ Designed event-driven architectures handling millions of daily transactions ✓ Developed wealth management, and healthcare analytics solutions ✓ Engineered resilient, high-availability distributed systems ✓ Deployed zero-downtime strategies with automated CI/CD pipelines ✓ Embedded Python-based machine learning models into live backend services ✓ Migrated microservices to latest Java version using virtual threads for superior scalability ✓ Modernized payment processing systems for high-volume financial transactions ✓ Deployed GitOps automation with autoscaling and infrastructure-as-code practices Passionate about tackling distributed systems, reactive architectures, cloud modernization, and AI-accelerated development. #OpenToWork #JavaDeveloper #JavaFullStackDeveloper #BackendDeveloper #SpringBoot #Microservices #AWS #Angular

Stackforce AI infers this person is a Fintech and Healthcare-focused Full Stack Developer with expertise in cloud-native architectures.

Experience: 9 yrs 2 mos

Skills

Java
Spring Boot
React
Spring Mvc

Career Highlights

9+ years of experience in full stack development.
Expert in cloud-native applications and microservices.
Proven track record in healthcare and fintech sectors.

Work Experience

UBS

Senior Full Stack Java Developer (1 yr 10 mos)

Mayo Clinic

Senior Full Stack Java Developer (1 yr 7 mos)

Wells Fargo

Java Developer (1 yr 9 mos)

Walmart

Java Developer (1 yr 10 mos)

AppLabs

UI Developer (2 yrs 2 mos)

Education

Bachelor's degree at Jawaharlal Nehru Technological University

Rojana K

Software Engineer

9 yrs 2 mos experience

Key Highlights

9+ years of experience in full stack development.
Expert in cloud-native applications and microservices.
Proven track record in healthcare and fintech sectors.

Stackforce AI infers this person is a Fintech and Healthcare-focused Full Stack Developer with expertise in cloud-native architectures.

Contact

Skills

Core Skills

JavaSpring BootReactSpring Mvc

Other Skills

HibernateREST APIsJava 21Angular 17KafkaAWSTerraformGitLabJenkinsGraphQLReact 18Spring Boot WebFluxAzure Kubernetes ServiceCosmos DBHIPAA compliance

About

Experience

9 yrs 2 mos

Total Experience

1 yr 10 mos

Average Tenure

1 yr 10 mos

Current Experience

Ubs

Senior Full Stack Java Developer

Jul 2024 – Present · 1 yr 10 mos · New York, United States

Leading full-stack development on UBS's AWS-based Wealth Governance Platform, supporting the large-scale migration of Credit Suisse wealth, trust, and multi-entity client data. Building high-performance Angular 17 micro-frontends and Spring Boot microservices with Java 21 Virtual Threads for advisor-facing workflows. Key contributions include designing RESTful and GraphQL APIs, implementing OAuth2/JWT security with AWS Cognito, modernizing legacy JSP/Struts applications, and driving event-driven architecture using Kafka . Leveraging AWS (ECS/EKS, Aurora, CloudFront), Redis, PostgreSQL, and a robust CI/CD pipeline with Terraform, GitLab, and Jenkins to deliver scalable, compliant solutions in a regulated wealth management environment.

HibernateREST APIsJava 21Spring BootAngular 17Kafka+5

Mayo clinic

Senior Full Stack Java Developer

Nov 2022 – Jun 2024 · 1 yr 7 mos · Rochester, MN

At Mayo Clinic, I helped modernize one of healthcare's most complex imaging and clinical data platforms, where performance and reliability aren't just technical goals, they directly impact patient outcomes.
Architected a reactive Spring Boot WebFlux + GraphQL backend that unified EHR, imaging, and operational data streams, while leading a React 18 re-platform that significantly improved load times on clinician devices. Built a GPU-accelerated DICOM viewer for high-resolution medical imaging and introduced a PWA strategy to support offline data capture in shielded MRI environments.
On the infrastructure side, deployed zero-trust microservices on Azure Kubernetes Service, streamed HL7 clinical events through Azure Event Hubs into real-time dashboards, and provisioned a tri-region Cosmos DB cluster for global availability, all while maintaining strict HIPAA compliance through Azure Key Vault encryption and dynamic data masking.
From reactive pipelines to secure cloud infrastructure, every solution was built with clinical precision in mind.

GraphQLReact 18Spring Boot WebFluxAzure Kubernetes ServiceCosmos DBHIPAA compliance+2

Wells fargo

Java Developer

Jan 2021 – Oct 2022 · 1 yr 9 mos · San Francisco, California, United States

Collaborated in Agile/Scrum teams with business analysts, QA, and UI designers to enhance internal content-management and workflow platforms supporting branch operations.
Developed core Spring MVC and Servlet-based modules using Core Java to power workflow approvals, routing, and metadata-driven content authoring.
Built and modernized enterprise UIs using HTML5, CSS3, jQuery, Bootstrap, and AJAX-driven components to ensure cross-browser stability and usability.
Refactored legacy jQuery-heavy and Struts workflows into modular JavaScript components and Spring MVC flows, improving maintainability and reducing UI defects.
Introduced Angular 8 selectively to modernize JSP-based pages while maintaining backward compatibility with existing systems.
Implemented backend integrations using SOAP (JAX-WS) services, XML processing (XSLT, XPath, DOM/SAX), and schema validation for internal feeds and reporting.
Designed persistence layers using Spring JDBC, Hibernate/JPA, and Oracle 12c PL/SQL, optimizing queries, indexing, and workflow accuracy.
Standardized builds and deployments using Git, Maven, Jenkins, ActiveMQ for asynchronous processing, and supported deployments across WebSphere, JBoss, and GCP environments.