MTN

Warren wrote and deployed USSD short code and SMS-driven VAS services, wrote Ericsson AIR resource adaptors for pre-paid subscriber USSD voucher top-up, and refactored a Maven-based build of the VAS system to resolve circular dependencies. Technologies used included JAVA, J2EE, JAIN SLEE, MOBICENTS, JBOSS, JMS, SEAM, ORACLE, SBB, RA, JPA, HTTP, SMSC, USSD, EJB, JAXWS, JAXB, VSIP, USIP, ACIP, SDP, CS5, PLSQL, LDAP, JDBC, MAVEN, HUDSON, XSLT, JSP, and JSF.