Open To Work
Sourabh Mittal
Gurugram
Work Preference
Summary
Principal Software Engineer with 15+ years of experience in Telecom and VoIP, specializing in C/C++, SIP, IMS, VoLTE, SBC, SIP B2BUA and RTP/Media Processing. Extensive experience in designing and developing high-performance telecom software, including SBC and DPDK-based RTP Proxy/data-plane solutions. Strong expertise in IMS application servers, MMTel, SCC AS, SRVCC and SIP signaling, with end-to-end experience across technical studies, HLD/LLD, development, debugging, performance optimization, testing, integration and customer support. Patent inventor in RTP Proxy technology and actively involved in AI-assisted software engineering initiatives to improve development productivity.
Overview
16
16
years of professional experience
Work History
Principal Software Engineer
Oracle
02.2022 - Current
- Delivered key SBC features covering SIP signaling, call processing, routing and interoperability, while driving AI-assisted engineering initiatives.
- Designed and developed high-performance RTP Proxy/data-plane components using C++, Linux and DPDK.
- Inventor of an RTP Proxy patent for distributed VIP:Port allocation.
Capgemini acquisition of Aricent Technologies
Aricent Technologies
12.2014 - 02.2022
Senior Technical Leader
Capgemini India
07.2021 - 02.2022
- Led SCC AS module ownership, facilitating feature delivery and conducting technical reviews with the customer.
- Managed technical feasibility, Black Box/White Box analysis, HLD/LLD, C++ development, testing, and customer support, ensuring comprehensive project execution.
- Conducted Black Box and White Box analysis for TAS ed SCC AS and MMTel AS development for Ericsson MTAS, contributing to delivery of key IMS/VoLTE features including SRVCC, ICS, SDS and T-ADS.
Technical Leader and Senior Software Engineer
Aricent India
12.2014 - 07.2021
- Developed SIP B2BUA using C++ for telecom applications.
- Developed and supported FEPNGN SIP B2BUA for IMS networks, integrating IN services with S-CSCF, SIP applications, and Radisys MRF for multiple telecom customers.
- Delivered features for MMTel and SCC AS, including SRVCC, ICS, SDS, and T-ADS, with ownership of technical studies, HLD/LLD, C++ development, and testing.
- Supported multiple telecom customers including Telenor, Telstra, COLT, RSA, and SingTel, covering development, integration, testing, and production support.
Software Developer
Reliance Tech. Services Pvt Ltd
02.2011 - 12.2014
- Developed and maintained SIP-based IP-Telephony services using OpenSER/Kamailio, facilitating registration, presence, call routing, and SIP signaling.
- Implemented features including PUBLISH/BATCH SUBSCRIBE, group chat, voicemail, last-seen, call blocking, notifications, and IP-based location services.
- Delivered features across full C development lifecycle, including testing, deployment, troubleshooting, and maintenance, ensuring reliable service delivery.
Education
Bachelor Of Technology - Computer Science
Arya Institue of Engineering
Jaipur, India07-2010
Skills
Telecom architecture
Session border controller and SIP
IMS and VoLTE
RTP and DPDK
C and Linux
High-performance networking
Technical leadership
Innovation and AI engineering
Accomplishments
Inventor of Distributed VIP:Port Free-List Allocator with Lock-Free Local State and Authoritative Distributed Cache for scalable RTP Proxy resource allocation.
Skills
Domain Experience
VoLTE · IMS · SIP · SBC · SIP B2BUA · RTP/Media Processing · Diameter · TAS · IP Telephony · WebRTC
Telecom & Networking
SIP Signaling · IMS Architecture · SIP Call Flows · RTP · SBC · RTP Proxy · DPDK · Packet Processing · High-Performance Networking
Programming & Operating Systems
C · C++ · Linux · Shell Scripting · Multithreading · Data Structures · GDB · Valgrind
Architecture & Development
HLD · LLD · Feature Design · Technical Feasibility Study · Debugging · Troubleshooting · Unit Testing · Integration Testing · System Testing · Performance/Load Testing
Tools & DevOps
Git · Gerrit · Jenkins · JIRA · Klocwork · Wireshark · ClearCase · ClearQuest · Meson/Ninja
Cloud & Emerging Technology
AWS · WebRTC · AI-Assisted Software Engineering
Timeline
Principal Software Engineer
Oracle
02.2022 - Current
Senior Technical Leader
Capgemini India
07.2021 - 02.2022
Capgemini acquisition of Aricent Technologies
Aricent Technologies
12.2014 - 02.2022
Technical Leader and Senior Software Engineer
Aricent India
12.2014 - 07.2021
Software Developer
Reliance Tech. Services Pvt Ltd
02.2011 - 12.2014
Bachelor Of Technology - Computer Science
Arya Institue of Engineering