Senior Software Designer

**** ******* **, *****, ** *****

Cell: 214-***-**** ****@*******.***

SUMMARY

Over 9 years of design, test and technical support experience.

Managed off shore design teams in India and China to deliver quality product on time.

Experienced in troubleshooting, debugging, analyzing and solving complex issues with GPRS, UMTS and LTE customer installations.

Lead software design teams on several occasions to design, test, deliver and help support feature sets for SGSN and LTE-GW in Wireless Packet Core networks

Experience with software development lifecycle including requirements analysis and review, design, implementation, and testing.

Solved complex IOT and maintenance problems with packet core installations at customer site.

Excellent technical writing skills, including design, test, and training documentation.

TECHNICAL PROFICIENCIES

Languages: C/C++ (POSIX multi-thread and socket programming), Java, Perl

Technologies : 2G, 3G, 4G (GPRS, UMTS, LTE)

Protocols: UDP, TCP/IP, GTP, LLC, SNDCP, MME, BSSGP, SAF specification

Operating systems: VxWorks, Nortel Carrier Grade Linux, Unix, Windows

Processors: PPC, i686 and MIPS

Hardware platforms: Nortel’s Passport, ATCA

Tools: MS Office, ClearCase, Rational Rose, Enterprise Architect, SLIM

Other Licensed Master Business Practitioner of NLP, Advanced Toastmaster

PROFESSIONAL EXPERIENCE

NORTEL NETWORKS, Richardson, TX (Aug 2000 – Nov 16 2009)

Next-Gen SGSN Project Senior Designer, Apr 2007 – Nov 16 2009

Lead a team of designers from China, designed and productized a session redundancy scheme for GGSN/LTE-GW data path on the ATCA hardware. This allowed the GGSN, LTE-GW to gracefully recover sessions with minimum impact to the User Equipment. This feature also minimized the subscriber impact during maintenance procedures like upgrade, patching and hardware replacement. Worked on GGSN/GW control plane redundancy, synchronization of all threads and multi-thread redundancy.

Provided Design Support for GW problems from the Nortel LTE trials.

SGSN Senior Designer, Oct 2003 – Mar 2007

Rapid Response Designer:

Involved in writing custom feature patches based on customer’s specific requirements.

Designed, coded, tested and delivered the patch with procedure supporting minimal disruption to the customers.

IOT support for R6 features.

Design Support:

Solved various issues with Release 4 and Release 6 compliance and interworking issues during VO trials.

Supported data plane optimization to increase throughput.

Analyzed performance and throughput metrics of customer networks and provide solutions to improve network efficiency as per the required RQMS statistics

Reproduce several difficult customer issues and solved them in a timely manner.

Provided clear, complete, professional and timely reports with technical analysis and recovery actions to various teams and management.

Prepared and Presented Root Cause Analysis to customers.

Provided support for packet core software upgrades, maintenance, VO and new deployments for SGSN of multiple customers including TMO, AT&T, Mobilkom, Telstra, O2 and AMX Claro.

Defined alternate stat system to allow more information to be collected for debugging.

GPRS/UMTS Senior Software Designer, Aug 2000 – Oct 2003

Designed a system that uses PTMSI signature verification in lower layers to reduce PTMSI collisions from various mobiles using the same PTMSI.

Own the responsibility of ensuring the quality of code being developed for the LLC, SNDCP and GTP layers of the SGSN across various releases of the SGSN.

Solved design and operational defects of the SGSN over various software releases.

Solved critical customer issues under tight deadlines by working in tandem with the Product Support team for GPRS.

Supported field deployment including solving various inters operation problems with over network equipment and User Equipment.

Ported LLC, SNDCP, and GTP to a high speed hardware with FPGA to help higher capacity data plane hardware deployment to customers.

Wrote and maintained documents for Functional Requirements, High Level Design, Detailed Design, and Unit Test during feature development as per the TL9000 standard.

Mentored junior designers.

EDUCATION

(1998-2000) Master of Science in Electrical Engineering from Texas Tech University, Lubbock, TX.

(1994 -1998) Bachelor of Engineering in Electronics and Communication from Madras University.

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