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SAI KUMAR - Sr Full stack developer

[email protected]

Location: Minneapolis, Minnesota, USA

Relocation:

Visa: GC

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SAIKUMAR TAMMINENI Sr. Java Full Stack Developer Mobile: 763-913-6029 Email: [email protected] PROFESSIONAL SUMMARY Having 11+ years of programming and enterprise-level application development experience including software information strategy planning, requirement analysis and prototyping, design, development, testing, debugging, performance tuning and production support. Strong knowledge in Object Oriented Concepts, Object Oriented Design (OOD), Object Oriented Analysis (OOA), Programming and its implementation. Expertise in designing and developing web and enterprise-level applications using J2EE technologies like JSP, Servlets, JDBC, and Oracle. Worked on Java Dependency Analysis Tool (jeeps) using Java 17 and JAR file attributes on Java 8. Responsible for building a framework to support the easy creation and consumption of REST Microservices using Java 8, JAX-RS, AngularJS (SPA), and Spring. Experience in Struts, Spring (Core, MVC, AOP, Security, Boot), and Hibernate. Developed Struts form beans, action classes, and JSPs following Struts framework standards. Involved in the development of model, library, Struts, and form classes (MVC). Used SAX XML API to parse XML and populate values for beans. Implemented RESTful Web Services for data transportation between multiple systems. Utilized Java 8 features like Lambda expressions and Stream API for bulk data operations on collections, improving application performance. Designed and developed application architectures based on Struts Framework using the MVC design pattern. Developed Struts Action classes using the Struts controller component. Used PL/SQL stored procedures for scheduled execution within applications. Experience in Big Data ingestion using streaming tools like Flume, Sloop, Kafka, and Storm. Hands-on experience implementing data analytics and big data solutions leveraging Azure, AWS, Google Cloud, Hortonworks, Cloudera-CDH, Spark SQL, Spark Streaming, and Kafka. Knowledgeable in cloud computing (AWS EC2) and microservice container deployment in Docker. Worked in key supply chain domains like sourcing, procurement, and logistics. Worked with supply chain management to enhance the creation and delivery of product services, including logistics and customer service. Involved in underwriting process development, which involved communication with external systems using IBM MQ and JMS. Experience designing and developing UIs with Thymeleaf, JSP, HTML5, CSS3, AngularJS, and JavaScript. The CMS and server-side interaction were developed using Web Services and exposed via JSON and jQuery. Involved in designing and estimating templates and components developed using Day CMS (Communique). Used display tag libraries for UI decoration and display tables for reports and grid designs. Strong experience in Shell scripting, SQL Server, Unix/Linux, and Python scripting with a focus on DevOps tools, CI/CD, and AWS Cloud Architecture. Build highly available content distribution sites using CI/CD tools such as Chef, Ansible, Docker, Maven, Jenkins, Jira, and Kubernetes. Used TDD methodologies, writing failing tests first, making necessary corrections, and refactoring the code. Involved in preparing high-level and detailed design of enterprise applications using J2EE. Worked with Solace messaging appliance administration and development. Implemented database connectivity using JDBC with Oracle 9i as the backend. Extensive experience in writing SQL queries, stored procedures, and triggers for efficient data handling. Expert in web services (SOAP, RESTful), ORM (Hibernate, JPA), XML, JSON, UML, ANT, JSTL, and Apache Log4J. Worked on core Java, using file operations to read system files and present them on JSPs. Used Jasper to generate rich-content reports. Provided troubleshooting and error handling support across multiple projects. Experience in using Java IDE tools like NetBeans and familiarity with Eclipse. TECHNICAL SKILLS Programming Languages Java 21/17/11/8, Core Java, C, SQL. Software Methodologies Agile, Scrum, SDLC Waterfall. J2EE Technologies Java Beans XSD, JAX-RS, JAX-WS, SOAP, WSDL. Web Technologies HTML, JavaScript, AJAX, Bootstrap, JSON, Angular, React JS, Kubernetes. Web service Frameworks Spring 4.3, Hibernate 4.3, Struts (2.5/2.3), Spring MVC, Spring IOC, Spring Boot, Spring AOP, Kafka Web Services SOAP, Testing Tools/Others Junit, Mockito, Log4J, Postman. Technologies/Tools AWS, EC2, Azure, Docker, JIRA Build Tools Maven 3.3.9, Ant 1.10, Grade 3.4.1, Jenkins Version Control Tools GIT, GITHUB 2.12.0, SVN, Bit Bucket. Application/Web Servers Web Logic Server 12c, Apache Tomcat (8.5/8.0), Apache HTTP Server, Joss. IDE Tools Spring Tool Suite 3.8.3, Eclipse, IntelliJ IDEA 2017.1, Net Beans, Visual Studio. Operating Systems Windows, Linux, Unix, Mac OS PROJECT EXPERIENCE Client: Fiserv, New Jersey Duration: June 2024 Current Role: Sr. Full Stack Java Developer Responsibilities Designed and developed responsive web applications for financial services using Angular 15, HTML5, CSS3, and SCSS, ensuring optimized user experience across multiple devices. Implemented client-side validation and form handling in Angular applications for improved user interaction and data integrity in financial transactions. Developed dynamic dashboards for real-time financial reporting using Angular, ensuring seamless data presentation for end users. Developed scalable front-end applications using Angular 15, TypeScript, JavaScript, and RxJS, ensuring efficient data handling and real-time updates with RESTful APIs integration. Built dynamic user interfaces with Angular 15, JavaScript, and TypeScript, utilizing Redux for state management and Reactive Forms for handling complex forms and validations. Developed RESTful APIs for financial applications using Java 17/21 and Spring Boot 3.3.6, ensuring secure, efficient, and scalable services for handling financial transactions. Developed robust backend systems using Java 17 and Java 21, implementing multi-threading, lambda expressions, and streams for performance optimization in high-volume financial applications. Utilized Java 17 and Spring Boot 3.3.6 to design and implement RESTful APIs, enabling efficient communication between microservices in a distributed environment. Leveraged Java 21 features such as pattern matching, records, and enhanced switch statements to simplify code and improve maintainability for large-scale financial systems. Designed and implemented microservices for transaction processing and payment services in the financial sector, leveraging Spring Boot and Spring Data JPA to ensure robust data handling. Integrated Swagger UI with Spring Boot microservices to auto-generate interactive API documentation, enabling real-time testing and faster integration for client and internal consumers. Developed and maintained OpenAPI 3.0-compliant specifications for REST APIs, facilitating secure and standardized communication across Fiserv s distributed financial platforms. Implemented role-based security and JWT token authorization flows within Swagger documentation to support secure API access and simulate real-world request scenarios. Streamlined API-first development by leveraging Swagger Codegen to scaffold client SDKs and stubs, reducing onboarding time for frontend teams and third-party partners. Collaborated with backend and UI teams to ensure end-to-end consistency between API contracts, Swagger definitions, and Angular-based frontend data models. Implemented OAuth 2.0 and JWT authentication mechanisms for secure user access and data integrity in the backend of financial services. Developed and implemented automated workflows using Python scripts, reducing manual processes and improving the efficiency of financial transactions and reporting in the automotive sector Leveraged Python libraries like Pandas, NumPy, and SQLAlchemy to automate data extraction, transformation, and loading (ETL) processes for seamless integration between automotive financial systems and external data sources Used Spring Data JPA for efficient database access and management with MySQL and PostgreSQL, implementing CRUD operations and ensuring data integrity. Implemented Spring Batch for processing large datasets and Spring Boot Actuator to monitor the health and performance of the application. Integrated Spring Cloud Config for centralized configuration and Spring Cloud Netflix Eureka for service discovery and load balancing across financial microservices. Enabled Spring WebFlux for reactive programming and used Spring AMQP with RabbitMQ for asynchronous, event-driven communication between microservices. Optimized data fetching with Spring Data JPA specifications and Spring Cache for improved performance in high-traffic financial applications. Used Spring Session for centralized session management and Spring Integration for handling message-driven architecture across services. Migrated legacy financial applications from monolithic architecture to microservices using Spring Boot, optimizing performance and scalability. Integrated GraphQL for efficient querying of financial data, allowing clients to retrieve precise transaction details and balances in real time. Worked extensively with relational databases like PostgreSQL, MySQL, and Oracle for managing large sets of financial transaction data, ensuring data integrity and compliance with regulatory standards. Implemented complex queries and optimized SQL procedures to handle high volumes of transactional data, improving database performance for financial services. Utilized AWS DynamoDB for NoSQL storage of transactional data, ensuring low-latency and scalable access to real-time financial records. Managed database migrations from on-premise systems to cloud-based databases (AWS RDS, DynamoDB), ensuring smooth transition of financial data with minimal downtime. Leveraged AWS services such as EC2, Lambda, EKS, S3, DynamoDB, and CloudWatch to build scalable, fault-tolerant applications, automating infrastructure provisioning, real-time monitoring, and optimizing storage and performance. Developed and executed unit tests and integration tests using JUnit 5 and Mockito to ensure robust and secure backend services for financial applications. Utilized Cucumber 6.x for behavior-driven development (BDD) testing, ensuring that financial services meet business requirements and user expectations. Automated API testing using Postman, ensuring that financial REST APIs function correctly and securely before production deployment. Used Jenkins for CI/CD pipeline management, automating the build, test, and deployment process for financial applications to ensure timely and reliable releases. Employed SonarQube for continuous code quality inspection, ensuring that all financial code adheres to industry standards and secure coding practices. Migrated legacy financial applications to cloud-native microservices using Spring Boot and Docker, improving scalability and reducing infrastructure costs. Optimized database performance for financial services by implementing indexing, query optimization, and database partitioning for handling large datasets of financial transactions. Implemented cloud migrations to AWS services like RDS, DynamoDB, and S3, ensuring smooth transitions and enhanced performance for financial applications. Utilized Swagger for API documentation, allowing easy integration and testing of financial APIs by internal teams and clients. Leveraged Redis for caching frequently accessed financial data, reducing load on databases and improving the response time for transaction processing. Monitored the performance of financial applications using Grafana and Prometheus, enabling real-time tracking of system health and identifying bottlenecks. Deployed and managed containerized applications on Azure Kubernetes Service (AKS), improving scalability and reducing deployment time by leveraging Kubernetes orchestration. Provisioned AKS clusters using Azure CLI and Azure Portal, ensuring optimal configuration and high availability for production workloads. Managed containerized applications using Kubernetes 1.22, orchestrating deployments, scaling, and monitoring with integrated Git for version control, enabling seamless CI/CD workflows for microservices applications. Implemented Jenkins for continuous integration and delivery (CI/CD), automating build, test, and deployment pipelines; utilized Docker for containerizing applications, ensuring consistent environments across development, testing, and production. Environment: Java 17, JDK 7, Spring 3.1, Hibernate 4.2, JSF 2.2, AngularJS, JavaScript 1.5, PHP 4/5, XHTML 1.0, Oracle 11g/12c, JDBC 4.2, REST, SOAP, Git, JUnit, Oracle SQL 4.0, ANT, Eclipse 4.3, WebLogic 11g, Apache Tomcat, AWS, Microservices, Docker, Kubernetes, Maven, React, TypeScript, MongoDB, MySQL, PostgreSQL, Redis, RabbitMQ, Nginx, Jenkins, Terraform, GraphQL, Elasticsearch, Kafka. Client: State of NewMexico, NM Duration: Nov 2022 to May 2024 Role: Sr. Full Stack Java Developer Responsibilities Participating in application solutions including assisting with planning and architectural design, development, resolution of technical issues, and application rationalization. Developed dynamic, responsive user interfaces using JavaScript (ES6+) and TypeScript, ensuring cross-browser compatibility with HTML5, CSS3, and Bootstrap. Built and optimized Single Page Applications (SPA) using Angular (4/6/12), RxJS, and NgRx, improving performance and scalability. Integrated backend services with frontend applications via Node.js and Express.js, developing RESTful APIs to ensure seamless communication between client and server. Implemented authentication and authorization in Angular with JWT and OAuth 2.0, securing user access and data protection across microservices. Optimized Angular applications by lazy loading modules and implementing AOT (Ahead-of-Time) compilation for faster startup times. Built real-time web applications with Node.js and Socket.IO, enabling live data updates and seamless communication between clients and servers. Integrated third-party APIs into Angular apps using Node.js, including payment gateways, social media authentication, and geolocation services. Developed server-side logic in Node.js, creating middleware for error handling, request validation, and logging to improve system reliability and performance. Implemented data caching in Node.js using Redis, significantly improving application performance by reducing database calls. Created responsive, mobile-first applications using Angular and TypeScript, ensuring an optimal user experience across all devices. utilized Python to build machine learning models that predict patient outcomes, assisting healthcare providers in making data-driven decisions and optimizing treatment plan Integrated real-time health data from wearable devices into centralized systems using Python, enabling accurate tracking of vital signs and providing actionable insights for both patients and doctors Developed scalable and high-performance backend services using Java 17/11, leveraging new language features like Pattern Matching, Sealed Classes, and Records to improve code readability and reduce boilerplate. Optimized application performance by migrating legacy systems to Java 17/11, utilizing enhanced JVM capabilities and garbage collection improvements for faster execution and reduced memory footprint. Designed and implemented microservices architectures using Java 17/11 and Spring Boot, incorporating RESTful APIs and Spring Security for secure, efficient, and maintainable systems. Enhanced code quality and maintainability by adopting Java 17/11 features, including var, Text Blocks, and Foreign Function API, resulting in cleaner, more concise, and more reliable codebase. Designed and developed microservices using Spring Boot 3.x, Spring Cloud, and Spring Security, ensuring highly scalable, secure, and decoupled service architecture. Implemented REST APIs using Spring Boot 3.x and Spring MVC, creating a robust framework for backend communication and integrating with Spring Data JPA for database operations. Secured microservices with JWT, OAuth 2.0, and Spring Security, enforcing secure communication across services and ensuring safe access to endpoints. Implemented Swagger UI and OpenAPI specifications for RESTful services built with Spring Boot, ensuring standardized API documentation across various State of Michigan agencies and departments. Collaborated with cross-agency teams to create interactive API portals using Swagger, improving developer onboarding and integration time for applications in public health and unemployment systems. Secured Swagger-documented APIs with OAuth2.0/JWT authentication flows, aligning with State of Michigan s data security and compliance mandates (HIPAA, CJIS). Automated generation of API contracts using Swagger annotations in Java, streamlining versioning and change tracking for services supporting citizen engagement and eligibility systems. Integrated Swagger with CI/CD pipelines (Jenkins/GitLab) to validate API contracts during build cycles and ensure seamless API updates across development, staging, and production environments. Used Spring Boot Actuator and Spring Batch for monitoring and managing application health, as well as implementing efficient batch processing for large datasets. Integrated microservices using Kafka and Kafka Streams for asynchronous message-driven architecture, improving data processing capabilities and scalability. Implemented data persistence layer using Spring Data JPA, Hibernate ORM, and SQL databases like PostgreSQL, MySQL, and Oracle to store and manage data. Wrote complex queries and stored procedures using PL/SQL and T-SQL for Oracle and SQL Server, improving backend efficiency and business logic processing. Worked extensively with SQL databases including PostgreSQL, Oracle, MySQL, and SQL Server, writing complex queries and optimizing database performance. Designed and implemented NoSQL databases using AWS DynamoDB and Azure Cosmos DB, ensuring high scalability and low-latency data access for modern applications. Implemented data ingestion pipelines using Spark 3.0, Flink, and Kafka for big data processing, transforming large datasets in real-time and storing them in AWS DynamoDB and Cosmos DB. Migrated legacy applications from monolithic architecture to microservices-based architecture, ensuring improved scalability and flexibility. Integrated third-party services and APIs in Spring Boot microservices, enhancing functionality while maintaining efficient, maintainable code. Deployed and managed applications on AWS EC2, EKS, S3, Lambda, and DynamoDB, utilizing AWS services for scalable and efficient cloud architecture. Implemented Kubernetes for container orchestration on AWS EKS, improving the deployment and scalability of microservices across multiple environments. Automated infrastructure management using Terraform, CloudFormation, and Ansible, enabling efficient provisioning and configuration management of cloud resources. Built CI/CD pipelines using Jenkins, GitHub Actions, and Docker, ensuring seamless integration, deployment, and version control management. Utilized Docker for containerization, packaging microservices in containers for seamless deployment across various environments. Implemented Redis caching layer to optimize response times for high-traffic applications, reducing database load and improving the overall performance of the system by leveraging Redis as an in-memory data store. Designed and deployed Redis-backed message queues to support real-time, asynchronous communication between microservices, enhancing the scalability and responsiveness of the application. Designed and deployed multi-container pods to ensure high availability and fault tolerance of critical applications on AKS. Monitored cloud infrastructure and services using AWS CloudWatch and Grafana, improving visibility and proactive troubleshooting of issues. Configured logging and monitoring for applications using Prometheus, Grafana, and AWS CloudWatch, enabling real-time monitoring and performance optimization. Developed unit tests using JUnit, Mockito, Jasmine, Karma, and Mocha for both Angular and Node.js applications, ensuring high code coverage and reliability. Configured Swagger for automatic API documentation and testing, improving development workflow and client integrations. Environment: Java 17/11, Spring Boot 3.x, Spring Data JPA, Spring Security, Spring MVC, REST, GraphQL, Hibernate 5.x, JWT, OAuth 2.0, Node.js 18, Angular 12, AngularJS, TypeScript, JavaScript (ES6+), HTML5, CSS3, Bootstrap, React JS, Vue.js, Redis, Kafka, Docker, Kubernetes (v1.22+), AWS (EC2, CloudWatch, Lambda, S3, EKS, ECR, DynamoDB), Jenkins, Git, Maven, Gradle, SonarQube, Swagger, Prometheus, Grafana, PostgreSQL, MySQL, SQL Server, Oracle, IBM MQ, RabbitMQ, Apache Tomcat, IntelliJ IDEA, JUnit, Karma, Jasmine, Mocha, Mockito, Spock, Microservices, CI/CD, Agile, Apache Kafka, Redis Pub/Sub, Spring Boot Actuator, Spring Batch, CloudFormation, Terraform, Postman. Client: CVS, RI Duration: Sep 2020 to Oct 2022 Role: Full Stack Java Developer Responsibilities Involved in the complete SDLC including the design of System Architecture, development of System Use Cases based on the functional requirements. Participated in Agile Scrum meetings, Sprint planning, task estimation, retrospectives, and Sprint demos. Developed dynamic web applications using HTML5, CSS3, JavaScript, and TypeScript for rich front-end functionality and responsive UI design. Proficient in ReactJS (v16) and React Native for building scalable, high-performance web and mobile applications with Redux, React Hooks, and Context API for efficient state management. Built reusable, modular components in ReactJS, improving UI performance, scalability, and maintainability across large applications. Optimized React application performance through Lazy Loading, Code Splitting, and React.memo for faster loading and efficient rendering. Implemented mobile-first design in React Native with TypeScript and Bootstrap, ensuring seamless cross-platform mobile development. Led the migration of legacy web applications to ReactJS and React Native, enhancing performance, maintainability, and cross-platform support. Developed and maintained Microservices using Spring Boot (v2.4), Spring MVC, and GraphQL to provide scalable back-end services and RESTful APIs. Integrated Spring Data JPA for efficient database interactions, and Spring Security for implementing secure authentication and authorization across microservices. Configured JWT and OAuth 2.0 for implementing secure user authentication and protecting endpoints, improving security across services. Migrated legacy authentication systems to OAuth 2.0 and JWT-based authentication to ensure more secure, scalable, and modernized application architecture. Implemented unit testing with JUnit 5, Mockito, and Jest for ReactJS components and backend services, ensuring high-quality code. Optimized back-end performance using Spring Batch for large-scale data processing tasks, and Spring Boot Actuator for monitoring and health checks. Built and deployed cloud-native applications leveraging AWS EC2, Lambda, S3, CloudWatch, EKS, and ECR for scalability, monitoring, and performance optimization. Leveraged Kubernetes (v1.22) for container orchestration, deployment, and scaling of containerized applications on AWS EKS, ensuring high availability and reliability. Managed infrastructure using Terraform, automating the provisioning and configuration of cloud resources across AWS environments. Designed and documented FHIR-compliant RESTful APIs using Swagger UI and Spring Boot to support secure, standards-based data exchange between CVS pharmacy systems and external healthcare providers. Integrated Swagger with CVS's clinical data platforms, enabling real-time interactive testing and documentation for APIs used in prescription processing, benefits eligibility, and patient engagement tools. Leveraged Swagger Codegen to generate Java client SDKs for consumption by mobile and kiosk apps, reducing manual effort and increasing consistency across CVS digital touchpoints. Implemented automated Swagger validation in CI/CD pipelines (Jenkins + SonarQube) to enforce contract accuracy and prevent deployment of undocumented or breaking API changes in healthcare systems. Extended Swagger UI with custom themes and metadata to align with CVS Health s internal API governance standards and improve clarity for internal developer portals. Integrated Redis for caching, improving application performance by reducing data retrieval times. Utilized Kafka (v2.6) for real-time messaging and optimized topic partitioning for efficient message distribution and processing in microservices. Configured Kafka clusters for managing message queues and ensuring optimized message throughput between microservices. Integrated IBM MQ and RabbitMQ for reliable message queuing and asynchronous communication, enhancing the decoupling of services. Managed application logging and monitoring using AWS CloudWatch, Grafana, and Prometheus, enabling proactive issue detection and resolution. Deployed microservices on Tomcat for handling HTTP requests, optimizing response times, and ensuring efficient scalability. Built Dockerized applications for consistent environments across development and production, simplifying deployment processes. Configured CI/CD pipelines using Jenkins and GitHub Actions, automating build, deployment, and testing workflows to support microservices and facilitate rapid deployment cycles. Managed and optimized database interactions with PostgreSQL, MySQL, SQL Server, and AWS DynamoDB, ensuring reliable, high-performance data storage and retrieval. Optimized backend performance using caching strategies (Redis), indexing, and query optimization. Improved system reliability by implementing circuit breakers & fallback strategies using Resilience4J. Designed real-time monitoring dashboards for tracking API latency, error rates, and system health. Environment: Java (8/11), Spring Boot (v2.4), ReactJS (v16), React Native, TypeScript, GraphQL, Spring Data JPA, Spring MVC, Spring Security, JWT, OAuth 2.0, Spring Batch, Spring Boot Actuator, AWS EC2, AWS Lambda, AWS S3, AWS DynamoDB, AWS CloudWatch, AWS EKS, AWS ECR, Kubernetes (v1.22), Redis, Kafka, IBM MQ, RabbitMQ, Jenkins, GitHub Actions, Terraform, Docker, SonarQube, Grafana, Prometheus, Postman, Maven, Gradle, Git, MySQL, PostgreSQL, SQL Server, JDBC, IntelliJ IDE. Client: TIAA,NY Duration: April 2018 to Aug 2020 Role: Full Stack Java Developer Responsibilities Involved in all phases of the portal changes analysis, design, development, testing, and deployment. Used Agile methodologies and participated in daily stand-up meetings, sprint planning, and retrospectives. Used JIRA for defect tracking, bug resolution, and sprint management. Selected AWS services based on compute, data, and security requirements for application deployment. Integrated Amazon Web Services (AWS) with existing application infrastructures. Developed interactive and responsive UI components using React.JS, Redux, and Flux architecture. Created Single Page Applications (SPAs) using Angular 6+ and React.js. Used Jasmine and Protractor for unit testing Angular components. Worked on REST API integration with React & Angular applications for seamless data communication. Used JSON and JSR353 API for structured data exchange between frontend and backend services. Developed UI enhancements and dynamic components using HTML5, CSS3, JavaScript (ES6+), and TypeScript. Built custom reusable UI components using Bootstrap and Material UI for consistent user experience. Developed Microservices in cloud environments using Spring Boot, Spring Cloud, and RESTful APIs. Implemented Spring Framework features like Spring IOC, Spring AOP, Spring Batch, and Spring Security. Created Spring configuration files for dependency injection and transaction management. Designed and implemented RESTful web services for integration with frontend and third-party applications. Developed web services using JAX-WS to interact with legacy backend applications. Implemented Asynchronous Messaging with Apache Kafka, RabbitMQ, and JMS. Developed Kafka Streams applications for real-time data processing, aggregation, and analytics. Integrated Kafka Streams with NoSQL databases like Apache Cassandra and Elasticsearch for efficient data storage and retrieval. Used Amazon DynamoDB (NoSQL) for scalable data storage and retrieval. Updated database scripts to accommodate changes due to UI modifications. Developed optimized SQL queries for Oracle, PostgreSQL, and MySQL databases. Used Hibernate ORM & JPA for data persistence and transaction management. Implemented batch processing using Spring Batch for high-volume data processing. Used Docker & Kubernetes for containerization and orchestration of microservices. Built and deployed applications using Maven, Gradle, and Jenkins for Continuous Integration (CI/CD). Used JUnit & Mockito Frameworks to write unit and integration test cases. Logged application events and errors using Log4J and Splunk. Automated testing workflows using Selenium and Cypress. Used CloudFormation templates (CFT) for AWS infrastructure provisioning. Monitored applications using Amazon CloudWatch and CloudWatch Logs. Integrated AWS Lambda functions with backend APIs for event-driven workflows. Deployed scalable applications on AWS EC2, S3, RDS, and DynamoDB. Environment: Java 8 , React JS, Spring, Hibernate, Struts, EJB 3, WebSphere 8, JBoss EAP 5, Bootstrap, Java Script, Node Js, Oracle 11g, PostgreSQL9, UML, SVN, AJAX, JSR 353, JNDI, JAX-WS, Ant, AWS (Amazon Dynamo DB, Amazon SQS, Amazon Cloud Watch, Amazon Lambda), Agile Scrum. Client: Sun Life Financial - Kansas City, MO. Duration: July 2016 to Mar 2018 Role: Full Stack Java Developer Responsibilities Worked in big data ingestion using streaming tools like Flume, Sloop, Kafka, and Storm. Big Data Ingestion & Streaming Tools: Worked on big data ingestion using streaming tools like Flume, Sloop, Kafka, and Storm. Development & Testing: Worked on various use cases in development using Struts and tested functionalities. System Design: Involved in preparing High-Level and Detailed-Level system designs using J2EE. Struts Framework Development: Created Struts form beans, action classes, and JSPs following Struts framework standards. Developed model, library, Struts, and form classes (MVC). Developed Struts Action classes using Struts controller component. Database Connectivity: Implemented database connectivity using JDBC with Oracle 9i database as the backend. UI & Reporting: Used Display Tag libraries for decoration and Display Table for reports and grid designs. Used Jasper to generate rich content reports. Testing & Refactoring: Applied Test-Driven Development (TDD) methods to write failing tests, correct code, and refactor. Core Java & File Operations: Worked with core Java, using file operations to read system files and present them on JSP. Supply Chain Domain: Worked with the supply chain domain for the creation and delivery of product services, logistics, and customer service. Underwriting Process: Involved in the development of the underwriting process, including communication with external systems using IBM MQ and JMS. CMS Development: Involved in the design and estimation of templates and components using Day CMS (Communique). Developed CMS and server-side interaction using Web Services, JSON, and JQuery. Java 8 Enhancements: Used Java 8 features like lambda expressions and the Date and Time API for enhancements. PL/SQL & Scheduling: Used PL/SQL stored procedures for applications requiring scheduling mechanisms. Error Handling & Troubleshooting: Provided troubleshooting and error handling support across multiple projects. Environment: Flex, EJB, spring, JSP1.2, Servlets2.1, Jasper reports, JMS, Scala, IBM MQ, XML, SOAP, Apache Tomcat, Clear Case, Log4J, ANT, Hadoop, Scala, Hive, Kafka, JUnit, Eclipse, UDDI, WSDL, JDBC, JNDI, Rational Rose 98, Oracle 10g, XSLT, XML, UML, HTML. Client: USDA - Kansas City, MO. Duration: Nov 2015 to June 2016 Role: Java Developer Responsibilities Designed and developed user interfaces that received the positive feedback from the warehouse operatives, leading to increased user satisfaction. Spring framework is used to implement Inversion of Control (IOC) and Model View Controller (MVC) Worked extensively on Web Services (SOAP & REST), XML, JMS and Spring Controller. Actively involved in designing and implementing Business Delegate, Data Access Object. Extensively used Java Collections framework for backend services and to display view on frontend. Developed reusable custom directives using Angular.JS using transude, restrict, event handlers and templating. Installation and configuration of Development Environment using Eclipse with JBoss Application server. Hands on experience in mapping tools like Hibernate (Hibernate Connection Pooling, HQL, Hibernate Caching, Transactions). Developed several modules using Spring MVC- Created Controllers, Services, used Dependency Injection feature for bean wiring. Developed complete independent microservices ton integrate with Identity management systems. Implemented microservices to fetch and display data from other apps. Worked on POC and develop prototypes for future enhancements of the current B2B application related to technology platform migration. Developed protype of current microservices to be ready for Eureka server Handling the activities such as user requirements analysis, design, construction, and implementation Good hands on setting up the environments and deploying ear s and running database scripts on UAT environments through UNIX SSH Tectia and Putty tools. Developed Maven based project structure having data layer, ORM, and Web module. Used MongoDB to run the reports and query the database for low latency and fast accessing. Developed and consumed REST web services to retrieve data from different applications. Design of REST APIs that allow sophisticated, effective and low-cost application integrations. Used JUnit to test the application with Mockito and Power Mocks. Environment: Spring Core, Spring MVC, Spring security, Java 8.0, Design Patterns, RESTful API, Web Services, JSON, Maven, Jenkins, WinSCP, Putty, Junit, Spring Web flow Client: Lowe s,NC Duration: June 2014 to Sep 2015 Role: Java Developer Responsibilities Involved in Analysis, Design, and Implementation/translation of Business User requirements. Design and development of data enrichment business process objects using Rete based in-house rule engine framework Integrated the application with custom in-house GEMS and Netting frameworks Used Reference Data cache to load frequently used data into memory to avoid redundant database reads. Design and development of Template Remediation for regulatory reporting. Design and development of DAO's using Hibernate, JDBC, SQL and PL/SQL Design and development of operational data validation reports using JSP, Struts, HTML, JavaScript, AJAX Used design patterns like DAO, DTO, Singleton and Business Delegate, Chain of responsibility. Involving in client s status calls to represent development progress and other key project discussions. Used Slot id-based table partitioning for partition strategy of high-volume data tables. Involved in writing SQL queries, stored procedures, and invoking them from Components. Design and Implemented development of ARTS balance sheet and MIS Drill Down Reports Involved in the unit testing the application using JUnit. Unit tested the changes and performed the code review. Performed joint system testing the application that involved other downstream systems. Environment: Linux, Java 1.4, Oracle 10g, WebLogic 10.1, Eclipse, Apache POI, Log4j, Core Java, JDBC, JNDI, J2EE, Java Beans, Servlets, Multithreading, JUnit, DOM, SQL, PL/SQL, Hibernate 2.0, vi, SVN, Windows-XP, HP QC, Weblogic10.0.3, SVN, Git. Keywords: cprogramm continuous integration continuous deployment user interface message queue javascript sthree database hewlett packard procedural language Idaho Missouri New Mexico New York North Carolina Rhode Island