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Vamshi - JAVA FULLSTACK DEVELOPER

[email protected]

Location: Dallas, Texas, USA

Relocation: YES

Visa: GC

VAMSHI BATHINI FULL STACK JAVA DEVELOPER Email: [email protected] Phone: +1 4698300135 PROFESSIONAL SUMMARY Full Stack Java Developer with over 10+ years of experience, leveraging a robust proficiency in Java 8/11, J2EE, and utilizing frameworks like Spring, Spring Boot, Spring MVC, Spring IOC, Spring Security, and Hibernate for robust backend solutions. Expertise in front-end technologies including React, Angular 4/5/6/8/9/11/13/16, Node.js, and proficient in HTML5, CSS3, Bootstrap, jQuery, AJAX, SASS, and SCSS. Skilled in TypeScript and various JavaScript frameworks like AngularJS, React.js, Redux, Next.js, plus Node.js and Express.js for both client and server-side development. Proficient in Java, C++, PL/SQL, and Python, demonstrating expertise in building robust and scalable backend systems. Proficient in Agile and Waterfall methodologies, excelling across the SDLC with strong collaboration, communication, and time management skills, ensuring efficient and scalable code delivery aligned with business goals. Proficient in developing microservices and managing servers like Apache Tomcat, WebLogic, JBoss, and WebSphere. Skilled in database design and management with Oracle, MS SQL, MySQL, PostgreSQL leveraging NoSQL databases like MongoDB, DynamoDB and Cassandra. Proficient in project management and documentation using JIRA, Confluence, Swagger, and Grafana. Extensive experience with cloud platforms, including AWS (EC2, ECR, ECS, IAM, EKS, RDS, Lambda, S3, CloudWatch, SQS, Glue, Elastic Beanstalk), Azure and PCF. Proficient in managing and streaming messaging systems with a focus on event-driven architecture, using tools like Apache Kafka, Active MQ, RabbitMQ, and Spring JMS. Implemented robust security protocols and features like LDAP, OAuth 2.0, Spring Security and JWT for token-based authentication, ensuring the safeguarding of applications and sensitive data. Hands-on experience with big data technologies such as Apache Spark, skilled in data visualization with Kibana, providing actionable insights for strategic decision-making. Managed Kubernetes for optimized scalable container deployments and high availability. Utilized Terraform for infrastructure as code, streamlining resource provisioning. Skilled in managing serverless APIs with API Gateway, integrating backend services using JAX-RS (REST) and JAX-WS (SOAP) for web service development, and proficient in connecting them with front-end applications. Expertise in Graph QL for efficient data queries, Graph DB for complex data relationships, and Solr for high-performance search functionality. Demonstrated expertise in Scala programming and leveraging the Spark framework to develop scalable and efficient data processing and analytics solutions. Proficient in utilizing BigQuery for large-scale data analytics and employing Kibana for insightful dataset visualization, enhancing decision-making processes. Strong expertise in J2EE testing, proficient in developing and executing test cases with JUnit, Mockito, Jasmine, Karma, Jest, Enzyme, Selenium and Cucumber, adhering to TDD and BDD principles. Experienced in Agile methodologies, including SCRUM and Kanban, with advanced skills in logging using Log4J and Splunk for quality assurance in dynamic development environments. Skilled in software development and version control using GIT, GitLab, GitHub and Bitbucket, adept in IntelliJ IDEA and Eclipse IDEs, proficient in build automation with Maven and Gradle. Specialized in Continuous Integration and Continuous Deployment (CI/CD) using Jenkins, adept at constructing streamlined pipelines and effective application delivery through Docker container services. TECHNICAL SKILLS Languages C, C++, Java 11/8, J2EE, JavaScript, Python 3.6.0, SQL,python Web Technologies jQuery, HTML, HTML5, CSS, CSS3, Bootstrap, TypeScript, AJAX, DOM, JSON, XML, SASS, SCSS,Tailwind Css Cloud and databases AWS EC2,AWS ECS,AWS S3,AWS RDS,AWS LAMBDA MongoDB MYSQL Workbenches JavaScript Technologies AngularJS, Angular 4/ 5/6/ 8/ 9/ 11/ 13/16, React.js, Next.js, Node.js, Express.js,Vue.js Java Technologies Spring, Spring Boot, Spring Cloud, Spring MVC, Spring IOC, Spring Security, Hibernate, Servlets, JDBC, JSP, JSTL, Swing, EJB, Scala, JAXB, Struts,AWT Database/RDBMS and ORM Oracle, MS SQL Server, MySQL, MongoDB, Redis, Cassandra, PL/ SQL, PostgreSQL, Graph DB Dynamo DB, BigQuery, Spark Web Services RESTful, SOAP, WSDL, Graph QL,XSD,JAX RS,JAX WS Operating Systems Windows, UNIX, LINUX, Mac OS. Testing Frameworks JUnit, Jasmine, Karma, Mockito, Enzyme, Jest, Log4j, Cucumber, Splunk, TDD, BDD, Postman, Selenium Web Servers Apache Tomcat, WebSphere, WebLogic, JBoss, Jetty, RBAC Tools and Packages GIT, IntelliJ IDE, Eclipse IDE, GitHub, Maven, Gradle, Jenkins, JIRA, Swagger, Grafana, Bitbucket, Docker, Kubernetes, Apache Camel, Kibana, Confluence, YAML, Helm charts, Solr. Cloud AWS, Azure, OpenShift, PCF. Messaging JMS MQ, Rabbit MQ, Apache Kafka, Active MQ, Amazon SQS PROFESSIONAL EXPERIENCE Java Full Stack Developer Client: Barclays, NewYork, NY Jul 2022 Present Key Contributions: Developed dynamic, responsive user interfaces with Angular 16, TypeScript, Bootstrap, HTML and CSS focusing on high-quality, maintainable code in main application. Responsible for the development of Single Page Applications (SPAs) using Angular frameworks to improve the productivity of the internal team. Point of contact for multiple PODs (Ordering, Address, and Payments) and used to handle end-to-end tasks. Designed web pages adhering to WCAG standards using Angular 16 accessibility features. Experience in using React JS for web development and used axios and redux saga for making calls (GET, POST, PUT, DELETE) for triggering or fetching data from Restful API s in reporting tool application. Utilized NgRx and RxJs for state management, aligning with Agile and Kanban methodologies for rapid, responsive development. Enhanced data stream processing in microservices using Java 8 features like Streams, Collectors, and lambda expressions, streamlining code, and improving backend efficiency. Leveraged Java 8's new Date and Time API for precise and efficient handling of time-related operations in application logic. Enhanced performance with Java 11's improved garbage collection and HTTP Client API; Applied new lambda and switch expression syntax for readability. Streamline code using Java 11 features like var in lambdas, enhanced string handling for efficiency and improved readability. Implemented Multithreading, Concurrency, Exception Handling and Collection whenever necessary. Used several J2EE Design Patterns (Session Fa ade, Aggregate Entity) for the Middle Tier development. Worked on developing UML Use case diagrams, Class diagrams, and Sequence diagrams using Visio tool. Designed robust RESTful APIs using Spring MVC and JAX-RS within a microservices architecture, ensuring seamless front-end communication and durable endpoints. Converted a monolithic app to microservices architecture using Spring Boot using 12-factor app methodology. SOAP-UI was used extensively for testing webservices across all environments. Extensively participated in working with Spring framework. Involved in writing JSP and Servlets. Leveraged Spring Cloud for distributed systems, configuration management, and service discovery in microservices. Customized query methods in Spring Data repositories, using query derivation mechanisms to create complex queries from method names, improving readability and development speed. Utilized Spring Data REST to automatically expose repository methods as RESTful endpoints, facilitating rapid development of data-driven APIs with minimal configuration. Leveraged Python for backend scripting, automation, and tool development, enhancing the technology stack and workflows. Integrated Scala concurrency and Akka's actor model for efficient financial data processing and API integration, ensuring Java compatibility. Utilized AJAX with JSON and XML for efficient, asynchronous data exchange in web services. Written Stored Procedures using PL/SQL and functions and procedure for common utilities using Oracle11g. Integrated Oracle databases with Java back-ends using JDBC and JPA/Hibernate for seamless data communication and CRUD operations, Integrated with API Gateway for scalable RESTful APIs. Developed DAO layer using Cassandra and expertise in CQL (Cassandra Query Language), for retrieving the data present in Cassandra cluster by running queries in CQL. Created application to create control files for performing seed data migration from DB2 to Cassandra called init load. Data files are created by Mainframe system. Various formats of data files are Fixed Width and delimited. Tracking and managing project issues using JIRA, leveraging its agile board and custom workflows. Optimized Spring Batch for data handling in microservices and CI/CD with chunk processing and retry/skip logic. Designed and implemented Apache Camel routes for simplifying integration patterns, enabling easy and flexible routing of messages across different endpoints. Created multiple Kubernetes Clusters in AWS and deploying a Docker Image on top of Kubernetes Cluster for testing purpose. Developed Terraform scripts to automate infrastructure provisioning, configuration, and deployment in AWS, resulting in a 50% reduction in deployment time. Optimized Kafka cluster performance by monitoring and tuning Kafka configurations and server resources. Integrated Kafka with real-time data processing frameworks such as Apache Flink and Spark Streaming. Developed error handling and message re-routing strategies using Spring Integration, ensuring robustness and resilience in message processing across the application workflow. Applied Spring Integration's support for Enterprise Integration Patterns (EIPs) to solve common integration problems, such as message filtering, transformation, and aggregation, streamlining data flow. Overseen CI/CD pipelines using Jenkins for automation along with LINUX Shell scripts to automate routine jobs, Maven for dependency management, and Git, GitLab for version control. Developed custom GitHub Actions workflows for multi-environment deployments, allowing for differentiated deployment strategies across development, testing, and production environments. Implement Groovy scripts in Jenkins pipelines to automate and enhance CI/CD processes, particularly for managing and deploying Java-based applications. Conducted system monitoring and performance tuning using Elasticsearch and Kibana, focusing on high application performance and availability. Implemented robust security measures with Spring Security using OAuth 2.0 for authorization and LDAP for authentication. Managed AWS EC2 for scalable web applications and S3 for secure storage, integrating AWS Lambda with API Gateway for serverless Python and Node.js scripts. Deployed microservices efficiently using AWS ECS with Fargate and orchestrate containers with AWS EKS for automated, secure management. Utilized AWS IAM for robust access control and user management; implemented AWS RDS for database management. Adopted GraphQL as the query language through the apollo-server and graphql-yoga for building flexible and efficient APIs, allowing clients to request exactly the data they need. Implemented asynchronous processing patterns with the Node.js async/await syntax and used the graphql-yoga server for a powerful and easy-to-setup GraphQL server. Enhanced Solr for full-text search, indexing, and scalable Solr Cloud in Java, aligning SolrJ with server. Using Redis cache in Microservices to reduce server overload. Designing several DATA pipelines using Kafka. Tested APIs with Postman and ensured code quality with Sonar Lint, Documented APIs using Swagger, ensuring clear and concise API documentation. Developed robust unit and integration tests using JUnit, Mockito, and Selenium, adhering to Test Driven Development (TDD) principles for comprehensive end-to-end testing. Developed Angular unit tests with Jasmine and Karma, used log4j for effective logging and tracing messages. Managed application server environments with Apache Tomcat, focusing on deployment, performance optimization, and ensuring system reliability. Full Stack Developer Client: Cardinal Health, Nashville,TN Oct 2020 Jun 2022 Key Contributions: Applying Agile methodologies and Scrum for efficient project management. Creating dynamic user interfaces using ReactJS for its virtual DOM feature, JavaScript for client-side scripting, and HTML/XML and CSS for webpage structure and style. Developed Ul using ReactJS, Redux, NextJS and used Redux-Promise in application to retrieve data from Back-End. Used Grunt build to build JavaScript, jQuery, CSS3, HTML5 files that embeds bootstrap, NodeJs bower components. Implemented Redux for state management and Redux Saga for asynchronous API calls, including middleware integration for RESTful services and side effects management in React applications. Managed data exchange and API interactions using AJAX, JSON, XML, ensuring robust communication between frontend and backend. Managed data serialization and deserialization using JAXB for XML binding, and JSON for data representation. Enhanced functionality using Java 8, focusing on Lambda Expressions and Streams; plan migration to Java 11 for advanced features such as the improved ZGC (Z Garbage Collector). Utilized Java 11's HTTP Client API to build robust and responsive applications. Optimized multi-threading for Core Java applications and minimized memory leaks in Core Java code. Built on-premise data pipelines using Kafka and Spark streaming using the feed from API streaming Gateway REST service. Build efficient Kafka producers and consumers for reliable messaging in distributed systems. Apply Spring Framework in MVC for modular and loosely coupled backend development. Designed and configured message channels and adapters in Spring Integration to connect with external systems and services, such as databases and messaging systems, enhancing integration capabilities. Architect and deploy Spring Boot microservices, integrating Spring IOC for dependency injection and Spring API for creating loosely coupled, modular applications. Optimized data storage using PostgreSQL for relational databases and management with Hibernate ORM and JPA for efficient data access and transaction handling. Leveraged Spring Boot 4.x for microservices, emphasizing auto-configuration and rapid development. Integrated Spring Data with Spring Cache, optimizing application performance by caching query results and reducing the number of database calls for frequently requested data. Implemented JWT with Spring Security for secure authentication and integrate Spring Boot Actuator for enhanced security and management of microservices. Worked with Spring MVC Framework to Design and Develop the REST APIS. Created advanced web applications with JSP and JSF, incorporating AJAX for real-time user interactions and data updates. Developed a CI/CD system using Jenkins within a Kubernetes container environment, leveraging Docker for building, testing, and deploying applications. Led the integration of AWS Lambda to create a seamless, serverless architecture, enhancing the efficiency of data processing and risk assessment modules. Seamlessly integrated AWS ECS and S3 services with Node.js applications, optimizing data flow and improving overall system efficiency. Leverage AWS Glue for serverless data integration and ETL, streamlining data transformation and analytics processes. Configured AWS CloudWatch Logs for centralized logging, setting up log streams and retention policies to manage logs from EC2, Lambda, and other services efficiently. Utilized GraphQL for efficient and flexible data queries, enhancing client-server interactions and data retrieval processes. Used Maven and GIT for project builds and version control, maintaining code integrity and facilitating collaboration. Developed custom Splunk data collectors for Java applications, enabling the capture of critical application metrics, logs, and events. This allowed for proactive monitoring and quicker issue resolution. Developed and executed unit tests using Jest, Enzyme, and Selenium, adhering to TDD methodologies. Integrated GitHub Actions with Docker, automating the creation, testing, and deployment of Docker containers, facilitating consistent and reliable application delivery. Simplify complex JavaScript with jQuery to enhance frontend development efficiency and user interface. Configured and monitored numerous MongoDB and NoSQL instances. MongoDB Schema Design using DB Ref, Manual Ref, Embedded Data Model Design. Performed CRUD Operations like Update, Insert and Delete data in MongoDB and handled database access and data transmission based on RESTful Web Service. Utilized Apache Camel's extensive component library for connecting a wide range of transport protocols and APIs, enhancing the application's integration capabilities. Designed and configured management reports and dashboards using Kibana. Managing project issues with JIRA and documenting processes in Confluence for seamless collaboration. Implement Role-Based Access Control (RBAC) for secure system access and manage application configurations with YAML and Helm charts. Integrated Redis/Memcached for caching to enhance application performance. Implemented ELK stack by integrating Kibana with Elasticsearch and Logstash for comprehensive log management. Utilized Spark for large-scale data processing and analytics, employing BigQuery for efficient handling of extensive datasets. Process large-scale data with Scala and Spark, utilizing Spark SQL for structured data querying and GraphX for graph data analysis. Managed application server environments with WebLogic, optimizing for performance and reliability. Full Stack Developer Client: State of Nebraska, Lincoln, NE Apr 2019 Sep 2020 Key Contributions: Developed scalable applications by creating TypeScript classes and services in Angular 5/6 to interface with RESTful APIs, leveraging Angular s component-based design for enhanced scalability and maintainability. Transitioned application development from React Native and JavaScript to Angular, focusing on exploiting Angular's service workers to enable robust offline functionality for a device logger library. Mastered the development of responsive web applications using Angular, transitioning from React/Redux to Angular's HttpClient for REST API consumption, and adopting RxJS for sophisticated reactive programming patterns. Optimized code using Java 8's concurrency features such as CompletableFuture for asynchronous programming, enhancing application responsiveness and scalability. Employed Java 8 s Interface Default and Static Methods to create more flexible and easily maintainable code structures, promoting better API design. Implemented Bean classes and configured in spring configuration file for Dependency Injection, Developed Controller Classes using Spring MVC, Spring AOP, Spring Boot, Spring Batch modules, handled security using Spring Security. Upgraded to Spring Boot 3.x for new features and built microservices with Spring Cloud. Build rich user interfaces with the JSF Framework, Using Hibernate to communicate with PostgreSQL database and queries using HQL. Tested web services using SoapUI, validating SOAP based web services and their responses. Implemented SOAP web services using JAX-WS for interoperable machine-to-machine communication, Handled data using MongoDB for high-performance and scalability, focusing on efficient data management. Optimized data retrieval with MongoDB indexing and configured cloud clusters with MongoDB Atlas. Write and maintain unit tests with Junit using TDD principles, ensuring code reliability and robustness. Used Azure DevOps for automated CI/CD, Implement event-driven microservices with Azure Functions. Utilized Azure App Service and Functions for scalable hosting and event-driven computing. Automated deployment of secrets and certificates from Azure KV into Azure Kubernetes Service (AKS), securing containerized applications. Integrated Azure KV with Azure AD for identity-based access control, ensuring secure and selective access to sensitive information based on roles. Optimized data storage and retrieval processes with Azure Blob and File Storage, ensuring high availability and secure access to application data. Utilized Azure's support for PostgreSQL to manage and scale relational databases seamlessly, ensuring efficient data storage and high availability. Utilized Docker for containerization, and Kubernetes and Terraform for orchestrating and managing containerized applications. Utilized RabbitMQ for efficient message brokering across distributed microservices, ensuring scalability and reliability. Used Log4J for logging and tracing messages. Used JBPM to manage workflow and schedule Jobs. Managed project workflows and issue tracking with JIRA, streamlining development processes. Used Git for version control and Gradle for build automation, enhancing consistency and efficiency. Designed and optimized MongoDB database schemas and queries for efficient data storage and retrieval. Used Graph DB for complex data relationships, ensuring efficient data processing and retrieval. Integrated Spring Security with JWT for robust protection against vulnerabilities and enhance code quality through Spring Boot testing. Implemented caching strategies using Redis and optimized server-side performance with NodeJS for efficient data operations. Apply Selenium, Jasmine, and Karma for comprehensive front-end and back-end automated testing, ensuring application reliability. Leveraged Apache Tomcat for server management, focusing on deployment and environment handling. Full Stack Developer Client: Verizon Communications Inc, Irvine, CA Sep 2017 Mar 2019 Key Contributions: Implemented web application request-response handling using Servlets, enhancing server-side processing and seamless frontend integration. Utilized XML for configurations, promoting structured data management, ease of integration, and maintainability. Develop, consume, and maintain SOAP-based web services with WSDL to ensure interoperability and seamless data exchange. Involved in working with MySQL, Oracle databases and Proficiency in writing SQL Queries and stored procedures. Deploy and manage applications on Apache Tomcat, optimizing for performance and scalability., and employ Maven for build automation and dependency management. Created web services using JAX-WS for interoperability and API design and optimize Oracle performance with PL/SQL scripts and Hibernate ORM. Configured Apache Server for web hosting, focusing on performance, security, scalability, and utilize Struts for MVC-based web application development. Applied DAO patterns for database interactions and AOP in Spring for efficient logging and transaction management, utilizing AWS for scalable cloud infrastructure and services. Implemented Spring Batch for robust batch processing, optimizing data handling and task automation in backend operations.; maintain unit tests with JUnit, following TDD principles. Designed XML schemas for standardized data structures, integrate Hibernate for database interactions, and implement scalable microservices with Spring Boot for rapid development and cloud adaptability. Enhanced message handling with RabbitMQ in microservices architecture, ensuring rapid development, maintainability, and effective communication. Full Stack Developer Client: Equifax Inc. Alpharetta, GA Dec 2015 Aug 2017 Key Contributions: Used WSDL and SOAP for the development of XML based applications. Used JAXB for XML marshaling and unmarshalling. Involved in writing complex SQL queries and developed Stored Procedures to populate the database. Used ANT build tool for compiling and generating war files. Developed SCM by using the JSP/HTML for each user interface. Servlets standard validations are used as the controllers for business logic and using JDBC, XML parsing techniques using MVC. Deployed application on the Client Linux server. Used Multithreading concept to post data from files to tables involving the transformation of files from one format to another. Worked with Log4J to capture the log that includes runtime exceptions. Performed unit testing using JUnit and participated in integration testing. Configured Azure Virtual Networks (VNets), Network Security Groups (NSGs), and Azure Load Balancer for optimizing network connectivity, traffic routing, and security for Java applications running on Azure cloud infrastructure. Kept up the bean life cycle by utilizing Spring IOC, which keeps session information about beans. Configured Struts-config.xml, Tiles-def.xml, and various properties files provided by Struts Framework for the implementation module. Utilized various utilities for User Interfaces like JSP, JSTL, JavaScript, HTML, CSS, PHP, jQuery, and Ajax. Experience in installing, configuring, and deploying applications on Web Logic Server. Environment: Core Java, J2EE, JSP, HTML, MVC, Servlets, Struts, JMS, MDB, EJB3.1, JUnit, PL/SQL, DAO, Web Logic Server, Ant, SOAP, JAX-WS, WSDL, Junit, SQL. Java Developer Client: Fidelity Investments, Nashville,TN Oct 2013 Nov 2015 Key Contributions: Developed Java/J2EE applications focusing on backend logic, data processing, and system integration, utilizing Core Java for efficiency, and integrating scalable microservices with Spring Boot. Worked on enhancements with the existing application, which was implemented using MVC paradigm, implemented by Spring Framework. Developed and consume RESTful web services for secure and scalable data exchange between systems. Involved in the development of user interface applications and professional web applications using HTML, CSS3, JavaScript, jQuery, Ajax, Bootstrap. Designed and implemented database schemas in PostgreSQL, optimizing tables and relationships for performance and scalability in web application development. Micro services development using spring boot and deployment in Pivotal Cloud Foundry (PCF). Experienced with Middleware Technology Messaging Brokers like JMS, Active MQ in SOA (Service Oriented Architecture). Managing project issues with JIRA and documenting processes in Confluence for seamless collaboration. Implement Selenium for automated testing of web applications, enhancing reliability and robustness. Manage data with DynamoDB, focusing on performance and scalability for handling unstructured data. Conduct performance testing and follow TDD principles for web applications using Apache JMeter. Environment: Java, J2EE, Git, Spring Framework, Core Java, REST Web Services, JavaScript, HTML5, CSS, SASS, JIRA, Confluence Java Developer Client: Semantic Space, Hyderabad, India. Jan 2013 Sep 2013 Key Contributions: Developed Java/J2EE applications focusing on backend logic, data processing, and system integration, utilizing Core Java for efficiency, and integrating scalable microservices with Spring Boot. Responsible for developing Java components using Spring, Spring JDBC, and Spring Transaction Management Used Spring JDBC in the persistence layer capable of handling high-volume transactions. Drew sequence diagrams and Class diagrams using UML. Utilized Agile Methodologies to manage the full lifecycle development of the project. Created and implemented Microservices or REST APIs using Spring Boot, REST, JSON Used Maven and configured Jenkins to build and deploy the application. Used form classes of the Spring Framework to write the routing logic and to call different services. Used the Spring framework for the middle-tier and Spring JDBC templates for data access. Developed SOAP/REST-based Web Services using both SOAP/WSDL and REST. Express Using Node.js and Implemented Back-end API using Node.js with the help of Express Framework. Used the Bootstrap framework for developing customizable and fully responsive designs for various screen sizes. Environment: JAVA EE 5, JUnit, AJAX, jQuery, JSP 2.1, Node JS, Mongo Db, SQL Server 2008, Web services, Apache Axis, XSLT, Servlets 2.5, Struts Tiles, XML, Spring 2.5, Spring Security 2.0, Spring MVC, Hibernate 3.0, Log4j, WebSphere 6.1, TOAD, Tortoise SVN. Keywords: cprogramm cplusplus continuous integration continuous deployment user interface message queue javascript sthree database active directory trade national microsoft procedural language California Georgia Nebraska New York Tennessee