Trung Lê

Software Engineer

Viettel High technology industries corporation - branch of Viettel group •  January 2015 - Present

1. 01/2015 - 04/2015: The Serving GPRS Support Node (SGSN) - Research solutions for SGSN-3G 2. 04/2015 - 12/2016: Serving Gateway in Evolved Packet Core - Research and develop a switching system (core network: Evolved Packet Core) on LTE Network: + Research and develop Lawful Interception at Serving Gateway, PDN Gateway. + Research and develop Offline Charging at Serving Gateway, PDN Gateway: Module Charging Data Function (CDF) and Charging Gateway Function (CGF). 3. 12/2016 - present: Multimedia telephony service in IP Multimedia Subsystem + Research and develop module S-CSCF in IP Multimedia Subsystem: Register, Authentication, ... + Develop Application Server in IMS: Supplementary services (Identity, Call hold, Call waiting, Call barring, ...), Online charging, Number normalization, Refresh session, Number change, SIP trunking ... for mobile, fixed line, virtual private branch exchange-centrex/virtual PBX. + Apply NETCONF and auto scale for MMTel application node

Parttime

TMA Solutions•  July 2013 - September 2013

1/ HTML5 Library: Research about HTML5, JS, CSS, PhoneGap and responsibility for develop the functions such as Map, Wifi control. 2/ Research Spring framework and Socket.IO