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Pavan Krishna Tirutullai - Sr Full Stack Java Developer

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Name: Pavan Krishna Sr. Java Full Stack Developer Email: [email protected] Phone: 4085480491 LinkedIn: https://www.linkedin.com/in/pavan-krishna-tirutullai-05501a194/ PROFESSIONAL SUMMARY: 10+ years of prevalent software experience in design, development and deployment of web-based Client-Server business applications using OOP, Java/J2EE technologies. Experience working with different SDLC (Software Development Life Cycle) methodologies like AGILE (SCRUM), TDD (Test Driven Development) and Waterfall Models. Proficient in applying Design Patterns like MVC, Singleton, Session Facade, Service Locator, Visitor, Observer, Decorator, Front Controller, Data Access Object. Strong experience in developing applications using Java/J2EE technologies like Servlets, Struts, accustom tags, Java Beans, EJB, Spring, Spring Boot, JDBC, Hibernate, JBPM, JMS, JSF. Good experience on Spring Framework - Spring Core, Spring DAO, Spring IOC, Spring MVC, Spring ORM, Spring AOP, Spring Boot, Spring Web flow and hands on experience in working with Spring Batch for monitoring, logging into the application, tracing, application support, transaction and resource management. Experienced in Object Relational Mapping (ORM) using Hibernate 4/5 and Java Persistence API Standard (JPA) for database mapping and data retrieval facilities. Expertise in UI technologies like XML, XML Spy, HTML, HTML5, DHTML, XHTML, CSS, CSS3, XSLT, JSON, jQuery, AJAX, JavaScript, AngularJS, NodeJS, ReactJS and BackboneJS. Experience in XML technologies such as DTD/Schemas, DOM, SAX, JAX-B, and XSLT. Good command and knowledge in working with Core Java Concepts like Collection frameworks, Interfaces, Synchronization, Serialization, Thread pools, JavaBeans, Externalization, Generics and Annotations. Hands-on experience on application development for Cloud platforms using technologies like Java/J2EE, Spring Boot, Spring Cloud, Microservices. Skillful in implementing Microservices architecture by utilizing Spring Boot, Spring Cloud, RESTful API, AWS for cloud-native infrastructure, Docker for containers, Redis and Nginx for middleware. Experience on AWS platforms VPC, EC2, ELB, SQ3, and EBS, ROUTE 53, Dynamo DB CLI and SDK s/API tools and good knowledge on AWS tools like S3, Lambda, Kinesis, Cloud Watch, SQS. Expertise in implementing client-server business applications using Microservices. Expert in Spring Security for Authentication and Authorization of REST services using OIDC on top of OAuth. Experience in configuration and deployment of multi-tier applications using different web servers like Apache Tomcat, WebSphere, Apache Axis, Apache HTTP Server, JBoss and WebLogic. Experience in creation of Docker containers and Docker consoles for managing the application life cycle. Good experience in implementing role-based authentication and authorization using SiteMinder and Spring Security. Experience in using Hibernate for mapping Java classes with databases and using Criteria API and HQL. Hands-on experience in implementation and developing using RDBMS like MySQL, DB2, Oracle. Experience in database design and development of PL/SQL stored procedures, and packages in relational databases like Oracle 9i / 10g / 11g, SQL Server 2005/2008, DB2, and MySQL. Hands-on experience in implementing, designing and developing NoSQL Databases like MongoDB, Apache Cassandra and CouchDB. Proficient in using AJAX for implementing dynamic Webpages where the content was fetched via API calls and updated the DOM (JSON Parsing). Experience in using JDBC and ORM tools like JPA, Hibernate for persisting data to different relational databases. Strong experience in building REST APIs in Java and NodeJS using spring boot and Express s respectively. Expertise in developing SOA (Service Oriented Architecture), REST and J2EE Web Services based on SOAP, WSDL, UDDI, JAX-WS, JAXB, JAX-RPC, JAX-RS using tools like Apache Axis. Experience in using Jenkins for CI/CD processes and creating Docker images and containers. Experience in working with different IDE s like Eclipse, Rational Application Developer (RAD), NetBeans, IntelliJ, STS (Spring Tool Suite), Visual Studio, Dream Viewer. Extensive experience with project build/test/deployment tools like Maven and Ant. Experience in using Code Repository Tools - Tortoise SVN, CVS, GitHub, and Visual Source Safe. Experience working with Log4j for logging and used JUnit and Mockito for unit testing and integration testing. Expertise in using JIRA for bug tracking and project management. Programming Languages Java 11/8/7, J2SE, J2EE, C, C++, PL/SQL Java/J2EE Technologies JSP, JSTL, JSF, Struts, Hibernate, JNDI, Servlets, JDBC, EJB, Bootstrap Web Technologies HTML5, XML, CSS3, JavaScript. JQuery, AngularJS, NodeJS, ReactJS, BackboneJS, Ajax, JSON Spring Frameworks Spring MVC, IOC, AOP, JTA, Spring Dashboard, Spring Boot, Spring Security Microservices Spring REST, Spring Netflix, Spring Zuul Proxy Cloud Environments AWS, Spring Cloud, Netflix Eureka, Pivotal Cloud Foundry Web Services Restful API, Microservices, JAX-RS, JAX_WS, JAX-RPC, SOAP, WSDL IDE Eclipse, Net Beans, Visual Studio, STS, Brackets, IntelliJ, RAD Version Control GIT, CVS, SVN Testing Tools JUnit, Mockito, Jira, Log4j, SOAP UI, Selenium, Cucumber, TestNG Build Tools Gradle, ANT, Maven, Jenkins Databases Oracle 9i/10g/11g, DB2, MySQL 5.1, SQL Server, NoSQL, Cassandra, Mongo DB TECHNICAL SKILLS: PROFESSIONAL EXPERIENCE: MasterCard, St Louis, MO Apr 2022 to Present Sr. Java Full Stack Developer Responsibilities: Implemented Java 11 features for the application development. Developed UI pages using HTML5, CSS3, ReactJS, NodeJS and JavaScript and used Bootstrap for creating responsive Web pages. Used J2EE design patterns like Adapter, Service locator, Session facade, Singleton, Factory and DAO. Used Executor Service framework to implement multithreading in programming to improve overall performance. Used Apache Kafka for reliable and asynchronous exchange of important information such as payment status report. Designed and implemented multi-threaded Java applications to optimize performance in high-concurrency systems, reducing response time by 30%. Utilized Java 11/17 features like Records, Streams, and Functional Interfaces for clean and efficient coding practices. Applied SOLID and OOP principles to develop modular and scalable backend component. Created Spring Boot with Micro Services utilizing RESTful API. Consumed REST Web Services for getting the credit card information from a third party application. Developed Restful Web services for other systems to interact with our system and added WS-Security using XWSS to secure the Web services. Integrated MongoDB for storing unstructured data and leveraged Spring Data MongoDB for seamless access. Built cloud-native Java apps and deployed to AWS (EC2, S3, RDS, Lambda) and Azure App Services with CI/CD. Used Docker to containerize Spring Boot applications and orchestrated deployments using Kubernetes. Implemented blue-green and canary deployments to minimize downtime during releases. Developed and deployed over 15 microservices using Spring Boot, Spring Cloud, and Netflix OSS stack (Eureka, Zuul, Ribbon). Implemented REST APIs using Spring MVC with HATEOAS and integrated Swagger/OpenAPI for API documentation. Configured circuit breakers and service resilience with Resilience4j and Hystrix. Implemented the associated business modules integration using Spring and Hibernate data mapping. Deployed Spring Boot based Microservices Docker and Amazon EC2 container using AWS admin console. Developed API for using AWS Lambda to manage the servers and run the code in the AWS. Created detailed AWS Security groups which behaved as virtual firewalls that controlled the traffic allowed reaching one or more AWS EC2 instances. Worked on creation of custom Docker container images, tagging and pushing the images. Worked on creating the Docker containers and Docker consoles for managing the application life cycle. Utilized Spring Core, AOP and WS-security to build robust business operations with transactional support. Implemented Spring Cloud Config Server, Routing and Filtering to Microservices using Netflix Zuul. Used Spring Batch which uses Spring IOC dependencies, this is useful for developing batch processing. Implemented Hibernate Template to great extent making use of HQL, Named Parameters, Named Queries and interfaces such as Expression, Query, and Criteria. Used Node Package Manage (NPM) for configuring the modules and libraries required for the application. Developed Session Beans for Transactions like fetching the data and updating the customer information. Worked on Drools Rules Engine and Expectation Rule Engine for writing Business Rule Validation. Migrated SOAP web service resources to Spring RESTful web services resources using Spring REST API with Spring Boot. Used J2EE design patterns like Adapter, Service locator, Session facade, Singleton, Factory and DAO. Developed the User Interface of the application using HTML5, CSS3, ReactJS, NodeJS, JavaScript, AJAX, JSON, and Bootstrap with Oracle database as the backend. Implemented Angular observables and listeners (RxJS reactive libraries) to simplify the making asynchronous calls to backend Rest APIs and used Swagger UI for API documentation. Authenticated users and provided the security to RESTful Web Services using OAuth 2.0. Developed unit and integration tests for existing microservices using JUnit and Docker environments. Involved in CI/CD process using GIT, Jenkins job creation, Maven build create Docker image and deployment in AWS environment. Wrote SQL queries using PL/SQL, stored procedures and enhanced performance by running explain plans. Deployed the application on Apache Tomcat Application Server. Developed and coded J2EE Components with JSP, Java Beans, and Business Objects with Hibernate. Actively used the defect tracking tool Jira to create and track the defects during QA phase of the project. Used JMeter to test performance of SOAP protocol. Environment: Java 11, J2EE, AWS Cloud, AWS EC2, AWS Lambda, AWS Security Groups, Spring Cloud, Spring Boot, Spring Batch, Spring Security, Spring IOC, Spring Core, AOP, Hibernate, HTML 5, CSS 3, Bootstrap, Core Java, Angular JS, Java Swing, SOAP/Rest, Web Services, Eclipse, JIRA 5.x/6.x, Microservices, JMS, SQL, NoSQL (MongoDB), Drools, Git, Apache JMeter, JQuery, JUnit, Docker, Maven, Jenkins, Selenium Signify Health, Dallas, TX Feb 2020 to Mar 2022 Java Full Stack Developer Responsibilities: Involved in all the phases of software development lifecycle (SDLC) including requirements collection, design & analysis of the customer specifications, development, deployment and customization of the application. Used various Core Java concepts such as Multi-Threading, Exception Handling, Collections framework extensively to store, retrieve and manipulate data objects of application in the business logic layer. Used J2EE patterns like Singleton, Service Locator, Session Fa ade and Business Delegate during development. Developed UI using HTML, CSS and JQuery to display the data on the client side. Wrote SPA using NodeJS as the server side, Gulp, Webpack (ES6), Restful web services plus Ajax and AngularJS. Used Backbone JS to optimize in-browser use, to load the module and to improve the Speed. Front-end development by utilizing JavaScript frameworks such as JQuery, NodeJS and AngularJS. Developed a dashboard based on Ajax calls with Business Customers Count, Flags, Real-time graphs for Analytical Reporting using NodeJS. Designed and deployed AWS Solutions using EC2, S3, EBS, Elastic Load balancer, auto scaling groups. Worked on Pivotal Cloud Foundry to host Application which used to role-based access controls, applying, enforcing roles and permissions to ensure that users can access for which they have been granted access. Re-architected monolithic service into microservices based architecture using Spring Boot and Pivotal Cloud Foundry. Automated build and deployment pipelines using Jenkins, GitLab CI, and GitHub Actions for faster release cycles. Managed application configuration and secrets using Spring Cloud Config Server and AWS Secrets Manager. Monitored production apps using Prometheus, Grafana, and ELK Stack. Achieved 90%+ unit test coverage with JUnit 5 and Mockito, ensuring robust and bug-free code. Performed integration testing with TestContainers and end-to-end testing using Selenium and Postman/Newman. Employed TDD and BDD methodologies in Agile sprints for better code reliability. Involved in Spring Configuration XML files that contain declarations and another dependent object declaration. Developed Microservices with Spring Eureka to retrieve API routes for the entire cluster. Using this strategy each microservice in a cluster can be load balanced and exposed through one API gateway. Utilized AWS Lambda platform to upload data into AWS S3 buckets and to trigger other Lambda functions developed drag and drop document editing. Worked on AWS for storage and content delivery and application deployment services. Implemented Data Access Object (DAO) persistence layer and Object-Relational (O/R) mapping using Hibernate. Used Spring Transactions in the application and spring beans to develop Session beans for the business logic. Used Spring MVC Framework IOC design pattern to maintain relationships between application components. It is also used to separate the application configuration and dependency specification from the actual application code. Implemented Spring service layer with dependency wiring, transaction, DAO, Annotations for Dependency Injection. Used Microservices with Spring Boot services interacting through a combination of REST and Spring Boot. Maintained quality Microservices code and developing a RESTful API to interact with the Microservices. Designed and developed application based on Spring Framework, Spring MVC and Spring Templates. Used Spring Framework for Dependency Injection and integrated with Hibernate DAOs for ORM mapping. Used NoSQL MongoDB database to provide recommendations on Performance tuning for applications. Called web services with REST Architecture to specify constraints through Angular JS services to get XML files. Involved in implementation of enterprise application communication and integration with Web Services and Legacy Systems using REST (Using Axis and Jersey frameworks). Used Selenium Data Driven framework for testing the application and Jenkins (Continuous Integration Tool) for continuous delivery pipeline. Used Maven as the Build tool and used GIT as assistant tools to access the code repository. Implemented the logging using Log4j which is used to log both User Interface and Domain Level Messages. Environment: Java 11, J2EE, Spring, Hibernate, AWS, Pivotal Cloud Foundry (PCF), Spring MVC, Spring Boot, Spring Eureka, AJAX, JMS 1.1, XML, SOAP, WSDL, REST, JDBC, JAX-WS 2.2, JavaScript 1.8.2, AngularJS, NodeJS, UML, HTML5, JAXB 2.2, SVN, Log4J, JMeter, Grunt, Webpack, Microservices, WebSphere 8.5, Application Server, Eclipse, Oracle 11g, GIT, Maven, Jenkins, Selenium, TestNG Discover Financial Services, Riverwoods, IL Jan 2018 to Jan 2020 Full Stack Java Developer Responsibilities: Implemented Spring MVC controllers, configured using Spring MVC annotations and configuration files. Implemented Spring framework Bean Factory & Application Context for bean initialization and configurations. Used Spring AOP for logging, auditing, and security and transaction management to distinguish business logic from the crosscutting concerns. Implemented the back-end functionality of the modules using Singleton and Session Facade design patterns. Used AWS (Amazon Web Services) services such as EC2, S3, RDS and Elastic Beanstalk for building the whole app on cloud infrastructure. Used AWS SDK for connection to Amazon S3 buckets as it is used as the object storage service to store and retrieve the media files related to the application. Developed API for using AWS Lambda to manage the servers and run the code in the AWS. Used AWS CodeCommit, CodeDeploy, and CodePipeline for implementing CI/CD. Unified build and test environments and provide efficient deployment method by Docker across different services. Combined it with Jenkins pipeline for CI/CD purpose. Optimized database access using JPA/Hibernate with custom native queries, achieving a 25% reduction in query execution time. Designed and normalized relational database schemas (MySQL, PostgreSQL) for enterprise applications. Integrated Java backends with front-end frameworks (React.js/Angular) via REST and WebSockets for real-time updates. Worked with CORS, JSON serialization/deserialization, and API versioning for seamless frontend-backend communication. Managed complex build configurations using Maven and Gradle with custom plugin integrations. Used Git (GitHub, Bitbucket) for version control and pull request code reviews in Agile teams. Used Spring Core Annotations for Spring Dependency Injection and Spring MVC for building REST APIs. Worked on RESTful Web Services for transferring JSON data between two interfaces. Configured Spring Boot Security with OAuth2 to grant permissions for different level resources. Used Hibernate as an ORM tool to interact with the database. Involved in development of POJO classes and writing Hibernate query language (HQL) queries. Performed asynchronous messaging using JMS and created Queue for point to point messaging. Developed the web interface using HTML5, CSS3, JavaScript, JQuery, ReactJS, and Bootstrap. Developed various screens for the front end using ReactJS and used various predefined components from NPM (Node Package Manager) and Redux Library. Developed REST web services using Spring MVC to extract client related data from database and used SOAP UI for testing these RESTFUL API web services. Implemented Service Oriented Architecture by developing and consuming RESTFUL services based on JAX-RS. Implemented Java Classes to use JAXP parser to create Java objects, able to modify the data in the response. Worked with DB2 and wrote SQL Queries, stored Procedures, triggers, and integrated SQL Queries into DAO. Performed unit testing using JUnit and created test cases using Mockito framework. Used Log4j logging mechanism for logging. Used SVN for versioning and concurrent access to the project files. Resolved Spring framework artifacts and code build & deployment with Maven. Used JIRA for defect and issue tracking and used Jenkins for continuous integration/continuous deployment. Environment: Java 8, J2EE, Spring MVC, Spring Security, OAuth2, Spring AOP, Hibernate 3.0, AWS, Docker, HTML, CSS, JavaScript, ReactJS, Redux, NPM (Node Package Manager), JMS, SOAP UI, RESTful API, Axis2, Maven, Jenkins, DB2, Selenium, Log4j, SVN, JIRA, Apache Tomcat 6.0, JUnit, Mockito GGK Tech, Hyderabad, India Jul 2015 to Aug2017 Java Developer Responsibilities: Involved in Software Development Life Cycle (SDLC) - design, coding, testing, and documentation using Rational Unified Process (RUP) for analysis and design of application. Developed UI using HTML, JSF, JQuery and JavaScript, AJAX in few applications. Developed CSS sheets for developing user aesthetic UI components. Developed Web applications in MVC architecture using Spring framework. Implemented logging in the application using Spring Framework AOP module to know the application status. Implemented RESTful API using Spring MVC to do the backend data transfers. Used Spring DAO module for performing CRUD operations on database. Used Spring IOC design pattern to provide relation between application components. Separated application configuration and dependency specification from actual application code. Used Spring Security with JWT for the RESTful API to provide application security. Developed SOAP Web service modules based on SOA architecture to consume services. Called external applications using Web Services for delivering notifications. Used JAXB parser for parsing the valid XML files as defined by the XSD. Used JMS API to access the queues, read and write the messages for processing. Worked on JUnit for creating test cases for all the Business Rules and the application code. Set up the basic project setup from scratch using Spring-Hibernate based design. Worked on JPA as persistence layer, involving EJB 3.1 annotations to synchronize with database through XML. Deployed the application in JBoss Application Server. Established database connectivity using JDBC and mapping the objects into MySQL database. Interacted with application testers to review system defects and provided comprehensive fixes. Addressed defects identified in DEV, QA, UAT phases and tracked them using JIRA. Environment: Java 8, J2EE, Spring MVC, Spring DAO, Spring Security, Spring IOC, HTML, CSS, JSF, JQuery, JavaScript, AJAX, JWT, JDBC, SOAP, SOA, JMS, JPA, JAXB, Hibernate, EJB, MySQL, JBoss 6.0, Ant, CVS, Junit Menlo Technologies, Hyderabad, India Aug 2013 to Jun 2015 Java/J2EE Developer Responsibilities: Participated in all phases of the project development life cycle like design, development, testing, enhancements and production support. Used Rational Rose for the Use Case Diagrams, Object Diagrams, Class Diagrams and Sequence Diagrams to represent the detailed design phase. Developed front end using JSP, HTML, CSS and client-side validations using JavaScript. Implemented MVC architecture and developed action classes for the entire application using Struts framework. Implemented Singleton, Service Locator design patterns in MVC framework and developed command, delegate, model action script classes to interact with the backend. Wrote the exception and validation classes using Struts validation rules. Designed and developed reusable Java classes for business logic functionality using services like JDBC and JNDI. Used JSP as the view, Servlet as the controller and Java Beans as the model to implement the Spring MVC to handle HTTP requests. Created the Registry Resources in WSO2 Governance Registry which would become a single resource for the registered schemas. Used XML technologies like XPath, XSTL for preparing reports. Developed dynamic and browser compatible pages using HTML, CSS, JQuery, Angular JS and JavaScript. Developed the login portal using framework AngularJS along with HTML5, CSS3. Developed WSO2 Carbon based Data Service layer to enable CRUD operations on Meta Content Repository. Developed Dispatcher-Servlet with web.xml files for proper routing applications. Invoked JavaMailSender API for automatically sending email functions. Deployed the application on WebLogic Application Server. Used JSON and XML to develop REST web services which are utilized by internal call in web and mobile applications. Monitored the error logs using Log4j and fixing the problems. Wrote JUnit test cases for unit testing of the application. Wrote ANT scripts for building application artifacts. Environment: Java 7, J2EE, JSP, HTML, CSS, JavaScript, Struts 2.0, EJB 2.1, Servlets, Java Beans, WSO2, JSON, XML, JDBC, JNDI, JMS API, JUnit, Log4j, WebLogic 7.0, Rational Rose Keywords: cprogramm cplusplus continuous integration continuous deployment quality analyst user interface javascript sthree database rlang information technology procedural language Illinois Missouri Texas