REVANTH CHANDRA

Description: Designing and developing a next gen PaaS (Platform as a Service) product which helps PayPal developers and teams to deploy production grade applications which takes millions of requests per minute. It includes backend, mid-tier, front-tier and AI/ML stack applications in PayPal hybrid cloud infrastructure.

Responsibilities:

• Designed and implemented highly scalable and resilient and highly available (99.999%) PaaS platform capable of orchestrating and managing 3500+ applications and over 150k pods, optimizing resource utilization and performance.
• Developed and maintained Kubernetes templates, streamlining application deployment and configuration processes, leading to significant time and resource savings.
• Leveraged Kubernetes native objects and also designed and developed custom controllers to automate secret management, enhancing security and reducing human error.
• Orchestrated multi-AZ deployments for improved fault tolerance and high availability, ensuring applications are resilient to infrastructure failures.
• Implemented Kubernetes CSI (Container Storage Interface) for providing ephemeral storage for thousands of applications and developed APIs to stream logs content over http.
• Designed and implemented No Sql data model for PaaS API layer
• Designed and maintained Ansible playbooks and roles to streamline routine system administration tasks, reducing manual effort and increasing efficiency.
• Utilized Puppet for maintaining consistent configurations across a large-scale infrastructure, ensuring compliance with organizational standards.
• Designed brand new next gen version for existing Infrastructure provisioning system which is federated model cluster provisioning and actively involved in development process.
• Hands on experience on IaC tools like Pulumi and Terraform
• Hands on experience on public cloud providers GCP, AWS, Azure as our platform is built on top of hybrid cloud.
• Experience in creating, managing managed kubernetes serves (GKE, EKS, AKS) at scale and successfully implemented federated model cluster provisioning and management system.
• Created POCs to adopt application deployments with Argo CD and Argo Rollouts using custom orchestrator controller to deploy across multiple clusters for high availability.
• Actively involved in designing Loadbalancer solution for production applications using licensed AVI solution and HaProxy for dev workloads.
• Established continuous integration and continuous deployment (CI/CD) pipelines with Jenkins, automating build, test, and deployment phases.
• Maintained Docker containers and employed Kaniko for image building and distribution, enhancing containerization processes.
• Developed APIs using Golang Gin framework to automate creation and scaling of Kubernetes clusters across on-premises and public cloud environments.
• Hands on experience in building helm charts for packaging kubernetes resources and maintained helm repositories.
• Using containerd as container run time for kubernetes
• Helped to maintain legacy deployment platform which was developed using Spring Boot and JAVA

Description : Developing a network management software (Single page web Application) called JOC (Juniper Optical Controller) which manages optical interfaces in juniper routers.

Responsibilities:

• Implemented microservices based architecture with different individual microservices which can be deployed in any public and private cloud
• Developed Micro services business components using Spring Boot.
• Consumed REST based Micro services with Rest template based on RESTful APIs.
• Developed server side components using java 8 for each micro service.
• Developed UI microservice components using angular js, java script, JQuery etc by setting up JHipster project infrastructure
• Used couchbase database which is No SQL database and Able to perform I/O operations (CRUD) on Documents using couchbase Java API, created Views
• Used NATS as messaging service between micro services
• Used Elastic search for server logs collection to show on UI.
• Created grafana dashboards to visualize time series data and application analytics which uses influx DB as data source
• Websocket mechanism to update UI dynamically with change in data on server side.
• Docker containers to deploy microservices.
• Created kubernetes container management system by creating 30-node cluster in production cluster.
• Used jasmine framework to write unit tests for angular js views and using karma as test runner
• Used gradle build systems
• Used gulp to do several gulp tasks like eslint and unit testing
• Used git as version control
• Worked with project managers, developers, quality assurance and customers to resolve technical issues

Description: Working on USACE (US Army Corps of Engineers) project i.e.REMIS (Real Estate Management Information System). REMIS is a web application which manages all real estate property of US Army Corps of Engineers across the country.

Responsbilities:

• Actively involved in analysis, design, development and testing phases of SDLC (Software Development Life Cycle)
• Developing web application using java development environment with J2EE architecture and EJB 3.0.
• Involved in design and implementation of MVC Architecture with Hibernate frame work.
• Extensively used Hibernate Query Language (HQL) in the Data Access Objects.
• Creating hibernate persistence classes from data base tables using several hibernate annotations
• Extensive knowledge on J2EE design patterns like MVC, Singleton, Factory Pattern, DAO, Session Façade.
• Used prime faces 3.0 to create UI screens and spring frame work to create business components.
• Used prime faces custom lazy model data model to deal with huge data sets.
• Developed UI components using Angular JS,Java Script, JQuery, prime Faces, Ajax and CSS to improve user interface experience.
• Used JUnit for unit testing entire application, rectified performance bottlenecks and eliminated critical bugs.
• Developed several RESTful web services with Jersey Implementation of JAX-RS supporting both XML and JSON to perform various tasks.
• Tested RESTful web services using browser extensions like Postman tool.
• Experience with software development methodologies like Scrum, Agile.

Description: Worked on web application which serves insurance domain.

Responsibilities:

• Worked on web application which serves insurance domain.
• Technology Stack: Involved in complete Software Development Life Cycle(SDLC) including designing, developing, testing and deployment of application.
• Used features of Core layer, Spring MVC layer in order to develop application.
• Used Spring beans with concept of Inversion of Control(IoC) for loading data.
• Developed user interface using JSP, JSP Tag libraries, Javascript, JQuery and AJAX to simplify complexities of application.
• Configured Hibernate configuration file, Hibernate mapping files and define persistence classes to persist data into SQL Database.
• Extensively used Hibernate Query Language (HQL) in Data Access Objects.
• Implemented Spring-Hibernate integration.
• Developed, Consumed and Tested RESTful based web services implemented by Jersey API.
• Worked On Drupal Content management system. Built Drupal Sites Architecture Sites Building Views Content Types etc and Sites Administration.
• Developed JavaScript for client end data entry validations and Front End Validation.
• Wrote JUnit test cases for unit testing integration layer.
• Wrote ANT Build scripts to Compile and build application.
• Used GitHub as version controller.