Client: Deutsche Telekom

Project 1: Push Server (Jun 2018 - Jul 2019)

Technology: Apache Tomcat, Java, Spring, REST API, Hibernate, PostgreSQL, Maven, Git, Logback, Junit, Jenkins, UnboundID LDAP SDK

Push Server is an IMS application created to send push notifications to client's handset.

• Created web access interfaces to trigger push notifications, when the application is suspended in the client or the recipient handset in Android/IOS devices.

• Created a new unit test framework for properties misconfiguration.

Project 2: File Transfer Content Server Proxy(FTCSp)(Dec 2018 - Jul 2019)

Technology: Spring Boot, REST API, Java, Junit, Git, Apache Jmeter, Gradle, Jenkins, open LDAP

FTCSp is an application server that is a proxy version of the File Transfer Server. FTCSp helps in reducing the load on the actual FTCS server mainly in case of when upload and download of the file happen in case of group chat.

• Analysed and implemented major optimization in a proxy server to support and fix the live issue in FTCS server for download request.

• Created a new integration test suite to run as part of Gradle build process for newly created interfaces and fixed defects as they were found.

Client: Deutsche Telekom

Project 1: Capability Application Server (CapAS)

Technology: Java, Jain Sip API, Apache Tomcat, Maven, Git, Spring, Hibernate, PostgreSQL, Junit, Jenkins.

CapAS is an IP Multimedia Subsystem (IMS) networking interfacing, a part of the Rich Communication Suite(RCSe) 2.0 network ecosystem that optimizes the service reachability and improves network bandwidth by caching handset capabilities in network cache.

• Implemented poll interface to retrieve registration details of the logged-in user and facilitate role-based features.

• Evaluated performance impact on Dynamic caching and implemented the optimal solution.

• Worked on database cleanup through spring schedulers, tested for memory leak, and implemented parallel scheduling on watchdog

Project 2: Register Application Server (RegAS)

Technology: Java, Jain Sip API, Mobicents, Apache Tomcat, Maven, Git, Spring, REST API, Hibernate, PostgreSQL, Junit, Jenkins.

RegAS is an IMS network interfacing application which is part of the Rich Communication Suite(RCSe) 2.0 network ecosystem that caches the registration details in network cache and provides the registration status of users to other application servers.

• Implemented a database migration approach using shell scripts to safely migrate records to be in sync with the latest release.

• Created a SOAP interface to handle the trigger notifying the current Active Paging Device(APD). And created an LDAP interface to query and verify APD status.

• Performed thorough testing, fixed build failures, and sonar violations.