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I am a Java Back-End Developer with 9+ years of experience building enterprise-grade software using Java, Spring, and modern microservices. I partner with product and business teams to design scalable, secure services and data pipelines, delivering reliable APIs, asynchronous messaging, and cloud-ready deployments. Throughout my career I have worked across Insurance, Biotech/Healthcare, and Financial Services, deploying on Kubernetes, Docker, and AWS, implementing CI/CD pipelines, monitoring, and performance tuning to ensure reliability and efficiency.…I am a Java Back-End Developer with 9+ years of experience building enterprise-grade software using Java, Spring, and modern microservices. I partner with product and business teams to design scalable, secure services and data pipelines, delivering reliable APIs, asynchronous messaging, and cloud-ready deployments. Throughout my career I have worked across Insurance, Biotech/Healthcare, and Financial Services, deploying on Kubernetes, Docker, and AWS, implementing CI/CD pipelines, monitoring, and performance tuning to ensure reliability and efficiency.

Appaji Manthena

Back-End Developer, Web Developer, Full Stack Developer, +3

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I am a Java Back-End Developer with 9+ years of experience building enterprise-grade software using Java, Spring, and modern microservices. I partner with product and business teams to design scalable, secure services and data pipelines, delivering reliable APIs, asynchronous messaging, and cloud-ready deployments. Throughout my career I have worked across Insurance, Biotech/Healthcare, and Financial Services, deploying on Kubernetes, Docker, and AWS, implementing CI/CD pipelines, monitoring, and performance tuning to ensure reliability and efficiency.…I am a Java Back-End Developer with 9+ years of experience building enterprise-grade software using Java, Spring, and modern microservices. I partner with product and business teams to design scalable, secure services and data pipelines, delivering reliable APIs, asynchronous messaging, and cloud-ready deployments. Throughout my career I have worked across Insurance, Biotech/Healthcare, and Financial Services, deploying on Kubernetes, Docker, and AWS, implementing CI/CD pipelines, monitoring, and performance tuning to ensure reliability and efficiency.

Available to hire

I am a Java Back-End Developer with 9+ years of experience building enterprise-grade software using Java, Spring, and modern microservices. I partner with product and business teams to design scalable, secure services and data pipelines, delivering reliable APIs, asynchronous messaging, and cloud-ready deployments.

Throughout my career I have worked across Insurance, Biotech/Healthcare, and Financial Services, deploying on Kubernetes, Docker, and AWS, implementing CI/CD pipelines, monitoring, and performance tuning to ensure reliability and efficiency.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Java Back-End Developer at Homesite Insurance

January 1, 2024 - October 28, 2025

Involved in all SDLC phases (requirements gathering to production deployment) in an Agile/Waterfall setting. Designed enterprise apps using Spring MVC/Spring Boot, implemented DAO patterns with Hibernate, and secured services with Spring Security, LDAP, and JWT. Built responsive UI with JSP/Servlets, and created reusable REST controllers with Spring Boot. Integrated Apache Kafka for real-time messaging and set up CI/CD pipelines with Jenkins and GitHub Actions. Led automated testing with JUnit, Mockito, and Cucumber and implemented logging/monitoring with ELK Stack and Prometheus/Grafana. Worked with DB2, Oracle, and PostgreSQL, and collaborated with mainframe teams for data synchronization. Supported UAT and production deployments.

Java Back-End Developer at Gilead Sciences

December 1, 2023 - December 1, 2023

Participated in all SDLC phases; applied design patterns; developed RESTful APIs and consumed SOAP services (JAX-WS, JAXB) for system integrations. ORM with Hibernate; Dozer for mapping; presented layers with JSP/JSTL/Servlets. Secured services via Spring Security with LDAP and JWT. XML/XSD processing; XSLT; XML DOM4J/JAXB; multithreading via Java Concurrency. Deployed on IBM WebSphere 8.5 and containerized with Node for cloud readiness. Automated builds with Gradle and Bamboo, artifacts to Nexus. Version control with Git; monitoring with Kibana; DB2/Oracle; XA transactions; UNIX shell scripts for automation. Engaged with stakeholders during UAT.

Java Back-End Developer at First Republic Bank

May 1, 2022 - May 1, 2022

Analyzed design using ISDM; produced UML artifacts; implemented Core Java components; designed persistence with Hibernate and caching; REST/SOAP services; JMS with ActiveMQ for asynchronous messaging; WebSphere/JBoss app servers; PL/SQL for Oracle; moved from Ant to Maven/Gradle; Git; JUnit/Mockito; Linux; collaborated with QA; supported UAT; production deployments; built J2EE components; session beans; EJB.

Java Back-End Developer at Mu Sigma

December 1, 2019 - December 1, 2019

Translated requirements into robust Java solutions; XML processing with XSD/XSLT; Dozer mapping; Spring Core with DI; SOAP services; JMS/MQ; MDBs; WebLogic; Oracle PL/SQL; SVN; JUnit; Selenium; Agile.

Java Back-End Developer at Persistent Systems

September 1, 2018 - September 1, 2018

Developed UI/presentation layers with Servlets/JSP; Struts; DOJO; AJAX; Spring/Hibernate; SOAP; Oracle 9i/10g; WebLogic; SVN; Scrum; JBoss; Ant; migration to Maven; Wrote unit tests; production support.

Java Back-End Developer at Homesite Insurance

January 1, 2024 - November 11, 2025

Involved in all phases of the SDLC in an Agile/Waterfall environment. Implemented SOAP and REST web services using Spring Web Services, JAX-WS/JAXB; designed enterprise apps with Spring MVC, Spring Boot, and Spring Core; implemented DAO/Service layers with Hibernate ORM and JDBC. Enforced session management and security via interceptors, Spring Security with LDAP and JWT-based authentication/authorization. Built responsive UI with JSP/Servlets, HTML5, CSS3, and jQuery; leveraged AJAX for dynamic form generation. Created reusable REST controllers with Spring Boot; integrated Apache Kafka for real-time messaging; built Maven/Gradle scripts; deployed on IBM WebSphere, Tomcat, and JBoss, later containerized with Docker. Configured CI/CD pipelines with Jenkins and GitHub Actions; tested with JUnit, Mockito, and Cucumber; monitored via ELK Stack and Prometheus/Grafana. Worked with DB2, Oracle, and PostgreSQL, including stored procedures; coordinated with mainframe teams for data synchronizat

Java Back-End Developer at Homesite Insurance

January 1, 2024 - November 24, 2025

Java Back-End Developer responsible for SDLC activities in an Agile environment. Built and consumed SOAP/REST web services (JAX-WS, JAXB, Spring Web Services), designed modular enterprise apps with Spring MVC/Boot, and implemented DAO layer with Hibernate. Secured services via Spring Security (LDAP/JWT), and integrated real-time messaging with Apache Kafka. Implemented CI/CD pipelines (Jenkins, GitHub Actions), automated builds and deployments, and monitored applications using ELK Stack and Prometheus. Worked with DB2, Oracle, and PostgreSQL; deployed to IBM WebSphere/WebLogic/Tomcat and containerized in Docker; collaborated with cross-functional teams and supported UAT.

Java Back-End Developer at Gilead Sciences

December 31, 2023 - December 31, 2023

Java Back-End Developer delivering scalable microservices with Spring Boot/Spring MVC, Spring Data JPA/Hibernate. Designed and consumed SOAP/REST web services (JAX-WS, JAXB, CXF). Implemented security via LDAP/JWT and managed asynchronous processing with Java Concurrency and JMS (ActiveMQ). Worked on XML/XSD transformations, Dozer for DTO mapping, multithreading, and cloud readiness with containerization (Docker) and AWS. Built and tested APIs, automated builds with Gradle, Bamboo, and Nexus artifacts; monitored with Kibana and Splunk; collaborated with cross-functional teams.

Java Back-End Developer at First Republic Bank

May 31, 2022 - May 31, 2022

Analyzed and designed modules using J2EE; implemented RESTful and SOAP services; used Hibernate ORM with Oracle DB; developed multi-threaded modules (Executors, Futures); implemented JMS with ActiveMQ for distributed messaging; built UI components with JSP/JSF; deployed on IBM WebSphere/JBoss; migrated builds to Maven/Gradle; created unit/integration tests with JUnit/Mockito; contributed to UAT and production support.

Java Back-End Developer at Mu Sigma

December 31, 2019 - December 31, 2019

Developed Java back-end components; implemented XML processing with XML/XSD/XSLT; built JSP/Servlet-based UIs; used JPA-Hibernate for persistence; implemented Spring core with DI; consumed SOAP/MQ-based services; implemented JMS and MDBs; wrote PL/SQL for Oracle; created automated tests with JUnit/Mockito; deployed on WebLogic; collaborated with QA during agile sprints.

Java Back-End Developer at Persistent Systems

September 30, 2018 - September 30, 2018

Designed presentation layer with Servlets/JSP; used Struts and Spring + Hibernate 3.2; integrated SOAP services; built Ant build scripts; deployed on JBoss; migrated to Maven/Gradle; implemented logs with Log4j; performed performance tuning; contributed to QA; participated in production deployments.