Job Responsibilities and tasks:Application designing.Integrated PJSIP stack and configured it for using in VOIP application.XCAP implementation for roaster management at server end.RC4 , RSA and AES Encryption.Diffie-Hellman Key Exchange Algorithm.XML , JSON, CSV & DOM Parsing.Implemented GPS Locator . Phone Tracker Description :- Designed to make phone data sync from server. functionality to track phone location in case of theftby fetching the location of phone via Cell ID or GPS.Sms alert is an add-on feature on SIM change.User also has the facility to delete Phone data via SMS; Title :- Dial-a-Code Description :- Designed to make cheap international calls on particular GSM service provider by using DID numbers in around two hundred countries.www.dialacode.com; FlexiRoam – An affordable alternative. Description :- Designed and developed for simple, affordable and convenient roaming from FlexiRoam gateway located in Malaysia.Data transmission is in encrypted form(using RC4 encryption); TmGo Description :- TmGo provides 'IP to IP' & 'IP to GSM' calling between the users. It offers services like VOIP calls, chats, buddies list.TmGo is integrated with Xcap to avail chats and SIMPLE protocol for presence to his Buddies.http://www.tm.com.my; Title :- MasterCard ИЗБРАННОЕ Description :- This is Russian Application In which User can See following Features depending upon Bank Cards and Categories selected:-News , Articles ,Partners ,Partners location on map.Used Json Parsing to receive data from server; Transaction Logger Description :- This application keep record of Contact, Sms ,Call log on server and Upload differences from previous upload at regular interval.Xml files are created which are loaded on server.