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Hi, I’m Katyaini Manne, a Senior Java Full Stack Developer with 10+ years of experience designing, building, and evolving Java applications in dynamic, enterprise environments. I design and develop Java-based microservices with Spring Boot, implement robust GraphQL APIs, and deliver cloud-ready solutions across AWS, GCP, and Azure. I value API-first design, strong data access patterns, and scalable front-end integrations using Angular and React. I thrive in Agile teams, contribute to architecture and CI/CD decisions, and enjoy mentoring colleagues to deliver high-quality software that drives business outcomes.…Hi, I’m Katyaini Manne, a Senior Java Full Stack Developer with 10+ years of experience designing, building, and evolving Java applications in dynamic, enterprise environments. I design and develop Java-based microservices with Spring Boot, implement robust GraphQL APIs, and deliver cloud-ready solutions across AWS, GCP, and Azure. I value API-first design, strong data access patterns, and scalable front-end integrations using Angular and React. I thrive in Agile teams, contribute to architecture and CI/CD decisions, and enjoy mentoring colleagues to deliver high-quality software that drives business outcomes.

Katyaini Manne

Full Stack Developer, Developer, Programmer, +5

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Hi, I’m Katyaini Manne, a Senior Java Full Stack Developer with 10+ years of experience designing, building, and evolving Java applications in dynamic, enterprise environments. I design and develop Java-based microservices with Spring Boot, implement robust GraphQL APIs, and deliver cloud-ready solutions across AWS, GCP, and Azure. I value API-first design, strong data access patterns, and scalable front-end integrations using Angular and React. I thrive in Agile teams, contribute to architecture and CI/CD decisions, and enjoy mentoring colleagues to deliver high-quality software that drives business outcomes.…Hi, I’m Katyaini Manne, a Senior Java Full Stack Developer with 10+ years of experience designing, building, and evolving Java applications in dynamic, enterprise environments. I design and develop Java-based microservices with Spring Boot, implement robust GraphQL APIs, and deliver cloud-ready solutions across AWS, GCP, and Azure. I value API-first design, strong data access patterns, and scalable front-end integrations using Angular and React. I thrive in Agile teams, contribute to architecture and CI/CD decisions, and enjoy mentoring colleagues to deliver high-quality software that drives business outcomes.

Available to hire

Hi, I’m Katyaini Manne, a Senior Java Full Stack Developer with 10+ years of experience designing, building, and evolving Java applications in dynamic, enterprise environments. I design and develop Java-based microservices with Spring Boot, implement robust GraphQL APIs, and deliver cloud-ready solutions across AWS, GCP, and Azure. I value API-first design, strong data access patterns, and scalable front-end integrations using Angular and React.

I thrive in Agile teams, contribute to architecture and CI/CD decisions, and enjoy mentoring colleagues to deliver high-quality software that drives business outcomes.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Javanese

Fluent

Work Experience

Java Full Stack Developer at Williams Sonoma

May 1, 2024 - June 6, 2024

Designed and maintained backend services and RESTful APIs using Java 17, 21, and Spring Boot for scalable enterprise applications. Built single-page applications using Angular 16 with features like directives, filters, and dependency injection. Developed and deployed GraphQL gateways with Apollo Server, integrating subgraphs and applying security measures such as authentication and rate-limiting. Leveraged cloud-native microservices on Pivotal Cloud Foundry and containerized deployments on Azure Kubernetes Service. Implemented load balancing, service discovery, and asynchronous message streaming with Apache Kafka. Automated testing with JUnit 5, Mockito, and Cucumber, and enhanced app performance through lazy loading in Ionic. Integrated Generative AI into product onboarding and developer tools, optimizing code generation, testing, and documentation. Collaborated on CI/CD pipelines using Jenkins, Docker, and Kubernetes while monitoring cloud infrastructure with AWS CloudWatch.

Java Full Stack Developer at Vanguard, Malvern, PA

February 1, 2023 - March 31, 2024

Developed Java helper classes and maintained services integrating with internal and external systems via REST and SOAP APIs. Built UI using Angular, React, and Node.js, adhering to agile practices and iterative development. Utilized Java 8's CompletableFuture and parallel streams for asynchronous processing. Created unit and integration tests with JUnit 5 and Mockito. Designed REST APIs documented with Swagger and implemented security via Spring Security with OAuth2 and JWT. Developed microservices with Spring Boot, including Eureka for service discovery and Spring Cloud Gateway for routing. Managed database interactions with Spring Data JPA, Oracle DB, and MongoDB, and optimized performance through SQL query tuning. Built CI/CD pipelines with Jenkins and containerized applications with Docker and Kubernetes. Conducted UI automation testing using Selenium and integrated AWS cloud services including Lambda, Cosmos DB, and CloudWatch.

Full Stack Java Developer at HCA Healthcare, Houston, TX

December 1, 2020 - February 28, 2023

Developed Apache Spark jobs for processing electronic health records improving data accuracy and availability. Created user interfaces using JSP, HTML, JavaScript, and React, and built SPA solutions with Node.js and Bootstrap. Implemented real-time data pipelines using Spark Streaming, Kafka, and Cassandra. Managed AWS cloud infrastructure and automated tasks using Chef. Developed GraphQL APIs with Spring WebFlux consolidating patient data while ensuring HIPAA compliance. Converted Hive/SQL queries to Spark transformations in Scala and Python. Implemented RESTful services and SOAP web services and consumed XML messages with Kafka. Conducted unit and integration testing, collaborated in agile environments, and supported QA in UAT phases.

Full Stack Java Developer at Republic Bank, Louisville, KY

September 1, 2018 - November 30, 2020

Developed and configured microservices using Java, Spring Boot, and Hibernate for scalable enterprise applications. Designed RESTful APIs to support networking workflows. Utilized Spring Batch for efficient data processing and notification delivery. Employed Java 8 features for optimizing system performance and implemented security using Spring Security and OAuth. Explored Node.js and MongoDB for proof of concept applications. Deployed applications on AWS cloud and used Kafka and RabbitMQ for messaging and real-time processing. Collaborated cross-functionally and followed Agile Scrum practices. Developed cross-browser compatible front-end components with React and Angular.js.

Java/J2EE Developer at Trimble, Cleveland, OH

May 1, 2017 - August 31, 2018

Developed Java and EJB components in Mainframe DB2 environments using various J2EE design patterns. Created web service interfaces and implementations with SOAP. Improved front-end styling with Angular Material and CSS. Managed version control with Git, applied Spring Security, and translated prototype designs into HTML and CSS. Participated in Agile scrums and used Eclipse Kepler IDE.

Software Engineer at Yana Software Private Limited, Hyderabad, India

May 1, 2015 - February 28, 2017

Developed UI modules using HTML, JSP, AngularJS, JavaScript, and CSS. Used JSON and React for enriched web application interfaces. Implemented Hibernate for ORM and database operations with MongoDB. Developed web services using REST and SOAP. Managed SQL queries and PL/SQL stored procedures with Oracle DB. Participated in process documentation and audit compliance on Linux servers. Used version control systems SVN and Git. Developed business components with Spring Boot, IOC, and AOP.

Java Full Stack Developer at Williams Sonoma

May 1, 2024 - Present

Designed and maintained backend services and RESTful APIs using Java 17 and 21 with Spring Boot for scalable enterprise applications. Developed UI with Angular 16 incorporating Bootstrap for responsiveness. Built and deployed GraphQL gateways and automated CI/CD pipelines with GitHub Actions, Docker, and Kubernetes. Integrated Generative AI APIs for test generation and documentation. Managed Kubernetes clusters with autoscaling and zero-downtime deployments. Ensured HIPAA compliance and cloud security best practices on AWS and Azure. Mentored developers, optimized APIs, and handled high concurrency using Java features like CompletableFuture. Implemented asynchronous event-driven architecture with Kafka and Redis.

Java Full Stack Developer at Vanguard

March 31, 2024 - September 1, 2025

Developed Java helper classes and services integrating REST and SOAP APIs. Refactored monolithic codebases into scalable Spring Boot microservices with service discovery and API gateway patterns. Built responsive UIs using Angular 14 and Bootstrap. Configured Jenkins CI/CD pipelines for automated testing and deployment. Integrated Azure OpenAI for metadata enrichment and used ELK stack with CloudWatch for observability. Developed unit and integration tests using Mockito and JUnit 5. Applied secure coding practices with OAuth2/JWT. Automated infrastructure on Kubernetes with autoscaling and monitoring. Enhanced logging and exception handling, contributed to Agile teams, and mentored junior developers.

Full Stack Java Developer at HCA Healthcare

February 28, 2023 - September 1, 2025

Developed Apache Spark jobs for electronic health records processing, enhancing data availability for predictive analytics. Built HIPAA-compliant serverless applications using AWS Lambda. Created Single Page Applications with Backbone.js, Node.js, and Polymer. Developed reactive GraphQL APIs with Spring Web Flux. Implemented secure healthcare data exchange using REST, SOAP, and GraphQL APIs. Used Spark Streaming with Kafka and Cassandra for near real-time data. Automated testing frameworks with Spring Boot and Selenium. Worked with AWS Cloud management and Chef Automation. Developed and optimized RESTful APIs connected with Angular and Ionic clients.

Full Stack Java Developer at Republic Bank

November 30, 2020 - September 1, 2025

Developed and configured Java Spring Boot microservices with Hibernate for scalable enterprise applications. Designed RESTful APIs and used Java 8 features to optimize performance. Implemented secure communication using Spring Security and OAuth. Deployed applications on AWS and integrated messaging solutions like Kafka and RabbitMQ. Followed Agile methodologies and developed reusable front-end components with React.js and Angular.js. Created secure, scalable backend solutions and conducted cross-functional collaboration to deliver quality software on schedule.

Java/J2EE Developer at Trimble

August 31, 2018 - September 1, 2025

Developed Java and EJB applications in Mainframe DB2 environment. Implemented J2EE design patterns and created web service interfaces. Worked with DOM manipulation using JavaScript, jQuery, and AJAX. Developed SOAP web service components and used Spring MVC with annotations. Managed version control with Git and implemented spring security for microservices. Enhanced frontend styles using Angular Material and CSS. Participated in agile scrum teams for project delivery and code management.

Sr Java Full Stack Developer at Williams Sonoma

May 1, 2024 - Present

Designed and maintained backend services and RESTful APIs using Java 17/21 and Spring Boot; built GraphQL gateways; integrated REST services with Angular 16; developed cloud-native microservices on PCF; implemented API-first development with OpenAPI; used Spring Data JPA with relational DBs (PostgreSQL/MySQL) and MongoDB; configured Swagger/OpenAPI; implemented service discovery with Eureka and Ribbon; containerized with Kubernetes (AKS); worked with Kafka and GCP Pub/Sub; built CI/CD pipelines using Jenkins, Docker, and Helm; created Next.js UI with SSR; implemented automated tests with JUnit 5, Mockito, and Cucumber; ensured WCAG-compliant UI; integrated payment gateways and GenAI features.

Java Full Stack Developer at Vanguard

March 1, 2024 - October 9, 2025

Developed Java helper classes for updating customer accounts and information; built and maintained services integrating with internal systems and external partners via REST and SOAP APIs; used CompletableFuture and parallel streams for asynchronous processing; tested GraphQL endpoints with GraphQL Java Test, Mockito, and JUnit 5; built Product Builder UI in Angular/Node/HTML/CSS/Bootstrap; automated tasks using Python/XML; enhanced Hibernate mappings; documented REST APIs with Swagger/OpenAPI; created SPA front-ends using Angular 14 and React; implemented data pipelines using GCP Dataflow.

Full Stack Java Developer at HCA Healthcare

February 1, 2023 - October 9, 2025

Developed Spark jobs to process electronic health records for predictive analytics; built reactive GraphQL APIs with Spring WebFlux; implemented RESTful APIs with Spring MVC; ensured HIPAA compliance; integrated with Angular/Ionic front-ends; managed cloud resources with AWS and GCP; implemented Spring Security with OAuth2/JWT; configured Spring Batch for large data processing; monitored with Spring Boot Actuator and Swagger UI; performed performance testing with JMeter.

Full Stack Java Developer at Republic Bank

November 1, 2020 - October 9, 2025

Developed and configured microservices using Java, Spring Boot, and Hibernate; designed REST Web Services with JAX-RS; used Spring Batch for batch processing; implemented security with Spring Security and OAuth; built CI/CD pipelines with Jenkins; containerized with Docker and orchestrated with Kubernetes; worked with Kafka and RabbitMQ for messaging; designed relational schemas and optimized queries for Oracle/MySQL; implemented Redis caching to improve performance.

Java/J2EE Developer at Trimble

August 1, 2018 - October 9, 2025

Developed Java/J2EE components; implemented DAO, Business Delegate, and Value Object design patterns; worked with XML/XSLT for content transformation; created SOAP-based Web Services; participated in SCRUM; used Git for version control; implemented Spring Security; built Spring MVC controllers and front-end integrations with Angular Material.

Software Engineer at Yana Software Private Limited

February 1, 2017 - October 9, 2025

Developed UI modules using HTML, JSP, JavaScript, AngularJS and CSS; worked with React, Angular, Node.js, and Hibernate; used MongoDB and Kafka; built Spark/Scala-based data processing; containerized with Docker; implemented REST/SOAP services; collaborated in an agile environment; contributed to front-end and back-end integration efforts.

Java Full Stack Developer at Williams Sonoma

May 1, 2024 - November 25, 2025

Designed and maintained backend services and RESTful APIs using Java 17/21 and Spring Boot to support scalable enterprise applications. Built Angular 16 front-end components, integrated RESTful services with Angular, and developed GraphQL gateways with Apollo Server to aggregate data and enforce authentication and rate limiting. Implemented cloud-native microservices on PCF with high availability, used executor pools for concurrency, and adopted API-first workflows with OpenAPI Generator.

Java Full Stack Developer at Vanguard, Malvern, PA

March 1, 2024 - March 1, 2024

Developed Java helper classes for updating Customer Accounts and information, and built services integrating with internal systems and external partners via REST and SOAP. Implemented GraphQL endpoints, designed UI screens with Angular, and built data pipelines using Java 8 features for asynchronous processing. Established REST contracts with Swagger/OpenAPI and contributed to CI/CD pipelines and test automation.

Full Stack Java Developer at HCA Healthcare, Houston, TX

February 1, 2023 - February 1, 2023

Developed HIPAA-compliant data services and analytics pipelines using Apache Spark; built REST and GraphQL APIs to access patient data; implemented web UI with JSP/HTML/JS; containerized apps with Docker and deployed on AWS/GCP; set up monitoring with CloudWatch; performed performance testing with JMeter; implemented security using OAuth2/JWT.

Full Stack Java Developer at Republic Bank, Louisville, KY

November 1, 2020 - November 1, 2020

Built microservices using Java, Spring Boot, and Hibernate; leveraged Spring Batch for batch processing; developed REST/JAX-RS services; used Kafka and RabbitMQ for messaging; implemented AWS deployments and CI/CD pipelines; built front-end with React/Angular; integrated with Oracle DB, MySQL, and MongoDB; implemented caching with Redis.

Java/J2EE Developer at Trimble, Cleveland, OH

August 1, 2018 - August 1, 2018

Developed Java/J2EE components, EJBs, and SOAP/REST web services; implemented XML/XSLT transformations; created UI with Angular Material; implemented Spring Security; used Git; participated in Agile rituals; contributed to code quality and security improvements.

Software Engineer at Yana Software Private Limited, Hyderabad, India

February 1, 2017 - February 1, 2017

UI-focused development using HTML, JSP, JavaScript, AngularJS; implemented React/Angular front-ends; used Hibernate with MongoDB; developed RESTful and SOAP services; built Node.js back-end components; integrated with various data stores and service layers.