Stack Developer Information Technology

Vinaya K

Java Full Stack Developer

Phone: +1-678-***-****

Email: *************@*****.***

LinkedIn: https://www.linkedin.com/in/vinaya-vinnu-678323169/

PROFESSIONAL SUMMARY:

Having around 8 Years of experience in Information Technology in various roles with experience in Design, Analysis and Full Stack Development using versatile frameworks.

Java Full Stack Developer with exclusive experience in Microservices architecture using React/Redux.

Hold cutting edge technologies experience on JavaScript, Typescript, Angular 11/17-JS and Java tech stack.

Functional expertise includes Web Application & Desktop Application, CRM Applications.

Expertise with Object Oriented Design (OOD), Object Oriented Analysis (OOA), Object Oriented Modeling (OOM) based on Unified Modeling Language (UML) architecture.

Expertise in developing SOA (Service Oriented Architecture), REST and J2EE Web Services based on SOAP, BPM, WSDL, JAX-WS, JAXB, JAX-RPC using tools like Apache Axis.

Developed RESTFUL web services using Spring MVC, Spring Boot, Hibernate.

Implemented Pub/Sub messaging and distributed locks with Redis in microservices

Experience in Agile software development process, Test Driven Development and Scrum.

Utilized Java 8/11/17 features like Lambda expressions, Stream API for Bulk data operations on Collections, Pattern Matching, Sealed Classes and Interfaces, new String Methods which would increase the performance of the Application.

Good knowledge on AWS cloud formation templates and configured SQS service through Java API to send and receive the information.

Experience Hands in using Jenkins for continuous integration and continuous development.

Experience on Web Services, SOAP, JAX-RPC, WSDL, JSF, HIBERNATE, EJB, XML.

Experience in working with build management tools like Ant, Maven, GIT, JIRA,Log4j, Gradle, EC2, VPC, SNS, SQS, .

Experience in installing, configuring, tuning Apache Tomcat, WebLogic and WebSphere.

Expertise in utilizing Docker and K8s.

Hands-on experience in building telecom web portals for plan management, usage tracking, and payment systems.

Having very good experience in Python.

Following Domain Driven Design approach for the Microservices and API/Endpoint’s to facilitate reusability and maintenance.

Expertise in database modeling, administration and development using SQL, NOSQL, PL/SQL Stored Procedures, Triggers and views.

TECHNICAL SKILLS

Cloud

AWS( worked in Amazon for more than 2 years as full time java full stack developer)

Software/Standards

Programming languages: Java 8/11/17, Python, Kotlin,SQL, PL/SQL, UML2.0, NOSQL, React js, java script, Type script.

Technologies: JSP, Servlets2.x, JavaBeans, JDBC, Struts, RMI, EJB, Hibernate, Spring, Spring boot, Microservices, SOA, SAX and DOM Parsers, AJAX, JAXB, JAXP1.x, LDAP, Sybase Power Designer, RESTful and SOAP web services.

Web Technologies: HTML/DHTML, XHTML, JavaScript1.x, Typescript, XML, XSL, XSLT, CSS, Bootstrap, Angular 11/17-JS, Jquery, React JS, Tailwind CSS, Next Js.

Development Tools (IDEs): Eclipse, MyEclipse, RAD, WSAD, NetBeans3.3, MS Visual Studio 2005, Brackets and Web storm Web/Application Servers-Tomcat, WebLogic, and IBM WebSphere.

Database/Database Technologies

Oracle, SQL Server, MySQL, DB2, Mongo DB, Maria DB, Cassendra, Radis, postgres.

Build Tools:

CVS, GIT, SVN, VSS, Clear Case, JIRA, Jenkins, JUnit, TestNG, Selenium, Cucumber, Beehive, Mockito, IBM MQ, Log4j, ANT, Maven, Gradle, EC2, VPC, SNS, SQS.

PROFESSIONAL EXPERIENCE

Client: Capital One Jun 2024 – Till date

Role: Full Stack Java Developer

Location: Mclean, VA

It is an cloud-based digital Auto Navigator platform which have end-to-end auto loan application process. Here we supporting the loan origination to retail customers through capital one online platforms. This platform automates the credit checks, pricing, documentation and improves efficiency and reduces the loan processing time.

Responsibilities:

Designing and programming system-level software, especially for Microservices-based APIs and API endpoint implementation.

Cloud native frameworks (specifically pivotal technologies), database systems, and relevant programming languages.

Implemented Router Module of React Js to make the whole project a Single Page Application and add routers according to the requirements.

Worked on some of the new features of React Js like Server Components, compiler, Suspense, JSX, Windowing techniques, Formik etc.

Worked on React DevTools to deal with troubleshooting and Unit testing using Jest, end-to-end tests with Cypress.

Optimized application performance by leveraging Redis for in-memory data storage.

Designed and developed user interfaces using Spring MVC Framework, Spring Boot, Hibernate, JSP, HTML5, CSS3, Java Script, React JS and Tailwind CSS.

Experienced on spring framework applications like Spring Core, Spring AOP, Spring MVC, Spring Batch, Spring Security, and Spring Boot and did integration to Microservices into the existing system architecture.

Expertise in Apache Kafka message implementations and their integrations with the systems.

Work with component teams to resolve issues. Participate in planning, implementation, and growth of our customer's Confidential Web Services (AWS) foundational footprint Closely worked with Kafka Admin team to set up Kafka cluster setup on the QA and Production environments.

Implemented Oauth 2.0 for secure access and JWT for authentication, safeguarding user data.

Had knowledge on Kibana and Elastic search to identify the Kafka message failure scenarios.

Extensive experience in deploying, managing and developing MongoDB clusters. Experience in creating JavaScript for using DML operation with MongoDB.

Built Cassandra Cluster on both the physical machines and on AWS

Automated Cassandra Builds/installation/monitoring etc.

Designed and developed the REST based Microservices using the Spring Boot.

Created RFP Microservice to provide RESTful API utilizing Spring Boot with Microservices.

Wrote Junit test cases and ANT as a build tool for the services and prepared documentation.

Involved in functional test of the application and tested Java applications using Functional Testing, JBoss and Log statements.

Environment: Java 8/11, REST, Microservices, SOAP, XML, React Js, Tailwind CSS, Spring, Spring Boot, Spring MVC, AWS, Docker, Confluence, Git, Jenkins, Kubernetes, Maven, Kafka, Meter, JBoss, Apache Tomcat, Active MQ, Splunk, POSTMAN.

Client: State of Rhode Island Nov 2023 – May 2024

Role: Full Stack Java Developer

Location: Providence, RI

We played a key role in designing and implementing solutions within the Business Support System (BSS) domain of the telecom industry, with a focus on customer-centric functionalities such as billing, account management, and service subscriptions. These systems enabled end-users to manage telecom services, track usage, make payments, and access support through a secure, user-friendly platform. Additionally, contributed to 5G Core Provisioning initiatives, with in-depth knowledge of VNF, CNF, 3GPP standards, and active participation in relevant open-source telecom communities.

Responsibilities:

Involved in reviewing business requirements and functional designs for application and participated in creating Wire Frames.

Involved in Agile process, bi-weekly Sprints, and daily Scrums to discuss the development and achieve TDD (Test driven development approach).

Built distributed caching and data structures using Hazelcast’s in-memory grid.

Developed single-page applications using ReactJS, leveraging open-source libraries and frameworks such as Material-UI for design, React Testing Library and Jest for unit testing, D3.js for data visualization, and SCSS for styling. Utilized modern React features like hooks and context API to build dynamic and responsive Uis.

Developed different cloud-based analytics enterprise products like GSS-CUSTOMER JOURNEY, AI-FRAUD,Analytic OPS.

Served as POC for on call support in the production team on a rotation basis.

Utilized browser developer tools for debugging and validating web pages across multiple browsers to ensure consistent behavior and responsiveness.

Employed Jest as the primary test runner and assertion library, in conjunction with React Testing Library, to perform unit testing of React components. This approach focused on testing components from the user's perspective, enhancing test reliability and maintainability

Python scripts streamline the ingestion of claims data from diverse formats (CSV, JSON, XML), ensuring accurate and consistent data entry.

Configure backup, alerts, repairs and monitoring of Cassandra clusters using Opscenter.

Administered, monitored and maintained multi data-center Cassandra cluster using OpsCenter and Nagios in production.

Used MongoDB internal tools like Mongo Compass, Mongo Atlas Manager & Ops Manager, Cloud Manager etc.

Worked on MongoDB database concepts such as locking, transactions, indexes, Sharding, replication and schema design.

Worked on Big Data Integration &Analytics based on Hadoop, SOLR, Spark, Kafka, Storm and web Methods.

Worked on creating Microservices using Jersey and Spring.

Stored data securely using Azure SQL Database, Blob Storage, or Data Lake Storage with encryption and access controls.

Chatbots for claim status inquiries using Azure Bot Services.

Utilizing libraries like pandas and openpyxl, these scripts validate data integrity, reducing manual errors and enhancing efficiency.

Developed Restful APIs and Microservices using spring, Hibernate and Jersey.

Scaled Microservices, distributed systems and server less applications using Simple Queue Service (SQS).

Worked with Docker containers, running/managing containers, containers snapshots and managing image.

Environment: HTML 5, CSS 3, JavaScript, React Js, Tailwind CSS, Node.js, Express, MongoDB, SCSS, FLEX-BOX, DOCKER, APP CENTER, Spring boot microservices, Python, Azure, EC2 Instance, HTTP Module, Http Client Module, MERN STACK, NPM, Grunt.

Client: Amazon Dec 2020 – Aug 2023

Role: Full Stack Java Developer

Location: India

FashionSphere is a scalable, cloud-based e-commerce platform for fashion retailers, designed to offer a seamless shopping experience across web and mobile. The platform includes features such as product browsing, advanced filtering, personalized recommendations, secure checkout, and order tracking.

Responsibilities:

Worked on Spring Framework and Spring Boot for dependency and transaction management and implemented multithreading, concurrency, exception handling, and collections whenever necessary.

Utilized Modernizer extensively to build HTML5/CSS3 based page layouts that are cross-browser compatible and standards-compliant.

Responsible for implementing UI mockups, integrating third party react libraries, and handling/creating Redux store data.

Installed and configured Docker for creating Virtual environments and applied the company build pipeline using Jenkins, AWS, and Docker.

Involved in writing Java API for Amazon Lambda to manage some of the AWS services.

Led efforts to enhance the Amazon-wide offering experience, ensuring a seamless and intuitive process for all stakeholders.

Involved in creating the Hibernate POJO Objects and mapped using Hibernate Annotations.

Worked with Babel and Webpack in application build and deployment processes.

Good understanding of Client- side build tools like Gulp, NPM (Node package manager), Grunt and dependency management using Browser.

Used JWT (JSON web tokens) mechanism for authentication and authorization security configurations using Node JS.

Used Node JS for the communication to the server through Restful API and added user validations & permissions by using it.

Created and consumed RESTful API using Expres.js to provide centralized logic and reusable data retrieval build on top of Node.js

The backend uses of Node JS, Express JS, React JS, MongoDB and Mongoose, the complete MERN Stack to provide RESTful API.

Extensively Used Jenkins as Continuous Integration tools to deploy the Spring Boot Microservices to Pivotal Cloud Foundry (PCF) using build pack. Used Pivotal Cloud Foundry to quickly build, deploy and update the applications.

Involved in using Spring Data JPA (Java Persistence API) framework and JPA Specification criteria builder to work with dynamic queries in java.

Developed Unit test scripts using Junit and Spock. Implemented logging using Log4j.

Designed and developed independent Microservices using Spring Boot Rest Controller model and are deployed on UNIX boxes.

Employed Spring Boot for initializing and bootstrapping the build configuration for the boot-based web applications.

Utilized GraphQL to acquire data from the API and perform queries on the existing data.

Reactive API strong experience in integration tools like Apache CXF, Apache Camel Spring Integration and Mule ESB to integrate the enterprise application technologies with existing JVM environments.

Worked on Docker hub, creating Docker images and handling multiple images primarily for middleware installations and domain configurations.

Implemented the Spring security oath 2.0 for secure access.

Used Kubernetes to create a new cluster and container management tool.

Project code build is done using the MAVEN tool.

Used Continuous delivery / Continuous Integration (CD/CI) tools Docker and Jenkins to deploy this application.

Extensively used Mocha and Chai JavaScript unit testing tools for testing JavaScript pages.

Worked with Babel and Webpack in application build and deployment processes.

Implemented testing with Junit Framework using Mockito, Spring Junit Runner, JMeter, Power Mock and Mock MVC.

Able to create and manage External Lookups in Splunk to match event data with description.

Configure and Install Splunk Enterprise and Apache Server for user and role authentication and SSO.

Maintaining and troubleshooting Cassandra Clusters this includes monitoring and performing troubleshooting as per requirements.

Proficient Knowledge of JIRA to track issues and communicate with other teams at various environments.

Used GIT for source code management and worked with Visual Studio and Spring Tool Suite IDE.

Professional experience in Log4J for extensible logging, debugging and error tracing.

Environment: Node JS, Express JS, HTML5, CSS3-SASS, Bootstrap4.0, Hibernate4.x, OAuth2.0, OIDC, Eclipse JIRA, Apache Kafka, IBM MQ, Jenkins, Babel,Log4j, Redis, Mongo DB, GraphQL, Mongoose Connector, React Js, AWS, Oracle, JBoss, Kibana, Elastic search, Web pack, EC2, S3, RDS, EBS, Elastic Load Balancer, Docker, Apache tomcat, Selenium, Mocha, Chai, Mokito, Junit, mock mvc, Kubernetes, New Relic, Dump Analysis, Eureka, Swagger, Maven3.0.

Client: Optum Mar 2017 – Nov 2020

Role: Java Developer

Location: India

Developed innovative software solutions that enhance health outcomes while ensuring the

security of patient information.

Responsibilities:

Worked in a highly dynamic AGILE environment and participated in scrum and Sprint meetings. Participated in Iteration planning, requirements analysis, design, coding, testing, and documentation.

Designed and development of User Interfaces, tables using HTML, CSS and Typescript, Angular7.

Used OOPS concepts like Encapsulation, polymorphism, collections, and multithreading.

Migrating existing application into Microservices architecture using Rest APIs, spring boot, Spring Cloud config Netflix oss (eureka, zuul, hystrix) and AWS. Generated Metrics with method level granularity and Persistence using Spring AOP and Spring Actuator.

Used MySQL database and written number of sql queries for retrieving the data and validated that data against the business rules.

Used MAVEN as a Build Process and used generating Documentation, Reporting, and adding Dependencies.

Implemented CI CD pipelines using Jenkins and build and deploy the applications.

Created a fully Automated Build and Deployment Platform and coordinating code builds, promotions and orchestrated deployments using Jenkins and GIT.

Restful Web services for other systems to interact with our system and secured the service with Spring-Security Oauth-2.0.

Environment: Java/J2EE, Linux, HTML, Spring Integration, hibernate 3.0, SOAP, RESTful, CSS3, JavaScript, Eclipse 4.4,Angular, jQuery, POJO, XML, AJAX, JBOSS EAP 6.1, JUnit 4, Log4j, GIT, JIRA, Java 8, Design Patterns Singleton, Abstract Factory, Hibernate, Parameterized Statements, JSP, Servlets, EJB, JAXB, WebSphere 7.0, Maven, Shell Scripting

Educational details:

Masters: Computer information/technology services administration and management from Lindsey Wilson college (2024)

Bachelors: Bachelor’s in computer science engineering from Jawaharlal Nehru technology university Hyderabad (2017).

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