Raghuvaran Narayanan Email & Phone Number

San Francisco Bay Area

Versa Netwroks is a SD-WAN leader based in San Jose Working on VDirector product to manage SD-WAN Devices. Tech stack includes, CDB, Postgres, Java, Tomcat, Karaf, Camel, Redis, Spring, Spring Boot, Spring SecurityWorked on device workflows, RBAC using JPA, pub sub using Redis. . Used Springs Aspects , wrote custom Permissions Handler, Java Reflection, Java Generics Java annotations (created new annotation) to implement RBAC in a completely transparent and seamless manner. The developers using JPA apis, were completely transparent to the RBAC enforcement. The JPA api signatures were not modified.

San Francisco Bay Area

Working on a real time, analytics platform for device discovery and analytics and correlation engine for network monitoring (Cloud and in house). Data Collection, Scalability using Kafka Messaging and Real time analytics using Apache Storm. Persistence using Elastic Search. Worked on oauth2 rest layer security, Storm Bolts and Elastic Search persistence layer. FixStream Meridian is a cloud based network monitoring service that monitors cloud based services and stand alone services.Here is a Lamda expression of what our product doesDevice Discovery + Data Collection ---(push stream)---> Kafka Messaging + Data Pipline ---(push stream)---> Apache Storm Analytics Real Time Engine --(push stream)--> Elastic Search Persistence ---(pull stream)---> IT Ops Consumption using Rest APISRefactored code using Lamda expressions and reduced code size by 30%Refactored service level API's to return Optional , thus eliminating null pointer exceptions forever.Knows difference between Long Polling vs Websockets and what is Zero Copy file transfer, bloom filters, tries. Implemented a websocket end point using Spring and Stomp Message Broker which allows seamless on boarding / off boarding of remote clients in a loosely coupled environement.Currently working on building next generation rest service to display network topology visualization map using spring boot, spring hateos, spring data, embedded tomcat, and spring web sockets. Java 1.8 implementation using Lamda expressions, Java Stream Apis, filters, predicates, suppliers, consumers, map/reduce and collectors. Rest contracts using Swagger. Spring 4.0 RestEnvironment: GitHub, Gradle, JDK 1.8, Spring Boot, Spring Hateos, Spring Data, Elastic Search, Apache Storm, Apache Kafka, Zookeeper, MockIto , JUnit, SonarQube

San Francisco Bay Area

worked on token based security credentials for Rest APIsWorking on big data , data collection for analytics.Functional programming in ultra fast chrome V8 server side javascript engine with Node.js . Function context switching using apply/call, context variables hoisting , Closures, higher order functions , dynamic inheritance using object prototypes , async call backs, passing functions to other functions. Node.js modules include pm2, cluster/worker , async, forever, csv-parse, node-postgres, node-log4js for logging, node mocha for unit testing .

San Francisco Bay Area

Working on next generation energy management software.Hibernate, Spring security, Spring transaction, Spring ORM, Spring DI, Spring Aspects, Spring Batch i.e. Quartz. MySQL, Java. Test Automation frameworks, Spring JUnit, TestNG, Mockito etcCurrently working on a framework for generating notifications using quartz

San Francisco Bay Area

Worked on IMS2, inventory management system of display advertisements for Yahoo and other domain properties. This includes supply forecasting of advertisement inventory.Designed and implemented the migration of IMS2 commands that are routed through IMS1Designed and implemented parts of parts of protocol conversion for IMS1 command migrationInvestigated root cause and fixed several production bugs

San Francisco Bay Area

Implemented a web service for PKI certificate enrollment and certificate life cycle management. The web service replaces the current legacy system which uses UI site kit client.Designed and implemented the getPolicy operation as a web service operation using JAX-WS. This involved parsing a text file which has the policy data and returning it to the client as a SOAP payloadDesigned and implemented parts of the certificate enrollment operation using JAX-WS.Designed and implemented a Health Monitor API to monitor the health of the system. This was integrated with NagiosWrote the release notes and OTM trouble shooting guide Environment: JDK 1.6, Spring, Hibernate, SOAP, HTTP, JAX-WS, Apache, Tomcat, Eclipse, Ant, CVS, Oracle, SQL

San Francisco Bay Area

Implemented firmware manager which is used to import xml based metadata into the system and helps with pushing firmware upgrades to remote DSL gateways.Implemented web service API using best practices.Designed and implemented an elegant solution to trace web service API calls in all tiers of the application stack using log4j’s NDC framework. .Implemented servlet filters to modify HTTP/XML input to the TR-069 kernel engine to compensate for erroneous SOAP messages from DSL gateways.Refactored code to be jdk 1.5 generics compliant.Built a framework for generating Certificate Requests, issuing certificates, Certificate Monitoring, Certificate Chains, Certificate Trust store, Certificate Key Store. Integrated the Certificates framework with apache for https. Good understanding of Java threading, memory management and reflection. Good understanding of Java Strong, Weak and Soft References. Can discern when to use what.

San Francisco Bay Area

Designed and developed a distributed message processing framework.Creating the architecture of a reliable distributed message processing framework i.e. messaging infrastructure. Worked on fail-over, scalability evaluation, redundancy, session management, caching server, sticky session load balancer. Worked on fault tolerant messaging and HA messaging server. Design patterns and OOD evangelist. Mentored junior engineers on "simple" design principles. Proposed solutions to reduce development costs by outsourcing complicated development tasks to a voice notification company.Worked on voice notification web services using SOAP, apache, XML and java. Implmented core XML data processing layer using design patterns i.e. visitor, singleton, producer-consumer, flywheel and bridge

San Francisco Bay Area

ETAP is Enterprise Test Automation Platfom. This product is used to automate the process of testing EAI implementations. The product was developed using JDK1.3 and XML. The platform was designed to test a variety of target systems. Adapters were developed to talk to a variety of systems. Dynamically instantiated new adapters using java reflection. Used Xalan-Java, an XSLT processor for transforming XML documents into HTML files, and Xerces parsers for parsing the XML documents. Developed Adapter Framework using JDK1.3, UML, Rational Rose and Junit Developed Correlation Framework using JDK1.3, XML, Xalan, Xerces and Junit. Developed Tibco JMS adapter using JDK 1.3, Tibco JMS, Xalan and Xerces. Developed SQLAdapter using JDK1.3, JDBC, JDOM, Oracle 8.0, XML, Xalan and Xerces.; Developed a XSLT preprocessor for ETAP using Xalan, Xerces, XSLT and XSL. Developed a demo using ETAP and VoiceXML to test interactive voice activated application. Lead the offshore team by providing requirements, design feedback and system testing. Created/Reviewed internal and external facing documents. Environment: JDK1.3, Java Cryptography, CVS, perl, Clear Quest, Junit, Tomcat server, Shell scripts, OOAD, UML, Rational Rose 2000, ANT, JSP, Servlets, XML, XSLT, XML Schema, DTD, Xalan, Xerces, Oracle 8.0, Windows 2000, solaris

Campbell, Ca

Was engineering manager for eSES i.e. external Symphony Equipment Server.This was a data collection product that collects data from semi conductor tools and publishes it to a real time databaseJava 1.2, XML, tomcat

Orange County, California Area

Greater Los Angeles Area

Actually worked for Western Data Systems Which was later acquired by Manugistics

Greater Los Angeles Area

Greater New York City Area

M.E, Computer Science

Trained in Computer Vision, Pattern Recognition, Artificial Intelligence, Robotics, Robotic Path Planning, Image Processing and Data.

B Tech, Electronics And Communication

Activities and Societies: Calicut University Second Rank Overall in 1986. Member of college soccer, field hockey teams.

Grade 12, Math, Science, Valedictorian

Activities and Societies: Member of School Soccer, Field Hockey teams Captain of School Quiz, Ping Pong and Debating teams.