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Santhanakrishnan Yayathi

Old Airport Road, Bangalore – 560037, Karnataka, India.

Tel no: +919008406457 ♦ email: yskrishnan@gmail.com

PROFESSIONAL SUMMARY:

  · Senior-Developer/Lead with 11 years of experience in Networking and Telecom product

Software Architecture, Design and Development in C, C++, Python.

  · Strong L2/L3 switching and routing products experience with knowledge of various routing

protocols such as RIP, OSPF, BGP, MBGP, MPLS, MPLS-L3-VPNs and multicast protocols

such as IGMP, PIM(sparse, dense), MSDP and IPv6, RSVP protocols. Strong knowledge in

switching protocols such as 802.1q(VLAN Trunking), 802.1d(STP), 802.1w(RSTP).

  · Got expertise in OpenFlow, SDN, NFV and NV technologies, and OpenStack cloud

orchestration, XSD, Yang Model, NETCONF, JSON, KVM, RabbitMQ, MongoDB, ZeroMQ

while developing SDN/NFV applications such as MPLS-L3-VPN hosting for Service provider

and researching on possibility of Telecom NFV such as MRFC and RNC function virtualization.

  · Strong VOIP, SIP, IMS, SS7 & SIGTRAN products experience, software design and

development experience in SIP(gruu, outbound, regevent, presence, event, subscribe/notify),

Diameter(Cx, Dx, Sh), H323, MTP3, SCCP, M3UA, SUA protocol components, and worked

for requirements from products such as CSCF, RNC, MSC, HLR, UMG. Part of key network

solutions such as RNC Pooling, MSC Pooling, MSC Dual-Homing, MRFC/IVR systems etc.

  · Strong in XML with design and development experience in components like CCXML, VXML for

CTI and MRFC platforms and EXI(Highly efficient XML compression ratio 1:100) for

binarization of XML and direct SAX decoding from EXI compressed XML

  · Experience in developing products/protocols from scratch beginning with Customer

Requirement Capturing and Analysis, Alternative Concepts and Feasibility study,

Architecture, Design, and proof of concept implementation to full product implementation.

  · Exposure to design and implementation of Load Balancing and High Availability (Hot and

Cold Standby) features in the protocol components designed and implemented.

  · Self-motivated achiever with ability to deliver on committed timelines and can work in teams to

achieve results.

SKILLS SUMMARY:

OS, Languages and Packages:

  · C, C++, C#, Python, ZeroMQ, RabbitMQ, MongoDB, MS-SQL

  · Clearcase, SVN, Visual Studio, gdb, sed, SIPp, Open Stack, Mininet, Intel VTune Performance Analyzer

  · Linux, Windows, VxWorks, VirtualBox

Software Skills and Methodologies:

  · Multi-threaded Design and Development,

Debugging

  · Performance and Scalability Analysis, Tuning and

optimization

  · CPU Burst avoiding by specific optimizations and

Load shredding

  · Practiced Agile, Scrum and Lean methodologies.

Followed Scrumban (from Scrum and Kanban)

method.

EDUCATION:

BE (CSE)

PATENTS:

  · MULTICAST MESSAGE COPYING PROCESSING METHOD (Link) - United States PCT/CN2010/073416

– This is an invention for an XML Content router without inspecting deep inside the packet

Networking Technologies & Protocols:

  · IP Routing and Switching, UDP, TCP/IP, SCTP, RIP,

EIGRP, OSPF, BGP, MPLS, MPLS-L3VPN, MBGP,

PIM, IGMP, MSDP, RSVP, 802.1q, 802.1d, 802.1w

  · IMS, VOIP, SIP, Diameter , H323, SS7 (MTP3,

SCCP) & SIGTRAN(M3UA, SUA)

  · XML, CCXML(Platform for Portable Soft-switch

Application), VXML(Platform for Portable IVR

Application), EXI(Efficient Xml Interchange),

Open Flow, SDN, Open Stack, NFV, Yang, KVM

Virtualization

Diploma (EEE) Thiyagarajar Polytechnic, Periyar University, India.

PSG College of Technology, Bharathiar University, India CGPA – 9.13

97.75%

2003

2000

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PROFESSIONAL EXPERIENCE:

Senior Technical Lead,

Calsoft Labs, India

Santhanakrishnan Yayathi

Oct-2012 – Till Date

SDN/NFV Applications development

- Used Floodlight SDN framework with Open Flow protocol and Open Stack Neutron.

- Prototyped and Developed SDN application for MPLS-L3-VPN hosting for Service provider.

Gathering the entire Service provider network topology and infusing MPLS transports channels

into it and laying out VPNs based on Service provider configuration of Customer-VPNs.

- Researching on possibility of Telecom Network Functions Virtualization such as MRFC

resource virtualization, RNC virtualization etc...,

Language, Tools & Technologies: C, JSON, XML, Yang Model, SDN, NFV, KVM, Open Stack,

Floodlight, MongoDB, RabbitMQ, ZeroMQ.

UNS Converged Presence Solutions (at Motorola Solutions Inc)

- Design, development and verification of IMS Presence based SIP features like Outbound, Gruu,

RegEvent Subscription in the UNS client SIP stack.

- Verification and Testing of High Availability (HA Cold Backup) functionality in the UNS

Registrar and Presence Server boxes

Language, Tools & Technologies: C, IMS Presence, RegEvent, GRUU, Outbound,

SUBSCRIBE/NOTIFY framework

Software System Architect,

Huawei Technologies, India Mar-2005–Sep-2012

Routing Protocol stacks development and Maintenance

- Feasibility and design understanding of OSPFv2 routing protocol, for making use of it in

OSPFv3 design and development.

- Design and development of extension features, Maintenance and bug fixing for Routing

protocols such as RIP, OSPF, BGP, MPLS, MBGP for IPv6 VPNv4, RSVP.

- Familiarity with multicast routing protocols such as PIM(Sparse mode, dense mode), IGMP.

- Familiarity with Switching protocols such as 802.1d(STP), 802.1w(RSTP), 802.1q vlan

trunking, PVSTP

Language, Tools & Technologies: C, IP Routing and Switching, MPLS, VPN, Multicast Routing

XML Domain Development

- Design & Development of CCXML and VXML for CTI and MRFC platform (platform for

portable SoftX/IVR Applications)

- Design and Development of High performance XML compressor based on EXI standard, and

also implemented high performing direct EXI to SAX decoding functionality

Language, Tools & Technologies: C, C++, XML, XSD

RAI & SS7– Networks, Protocol development and Maintenance

- Design and Development of key product features such as Huawei RNC pooling solution, MSC

Dual Homing, MSC Pooling solution, MSC Traffic Screening in SS7, SIGTRAN layers of

protocols used in GSM, 3G networks and design and implementation of the same.

- Design and Development of key IMS domain features involving SIP, SIP B2BUA support, ICSCF

load balancing, Diameter Cx, Dx, Sh interfaces etc.

-

In all the SS7, SIGTRAN and RAI components handled Load sharing (By Distribution) and

High Availability (HA Hot Backup) functionalities for the IMS, 3G network products.

- Performance Engineering and Proactive Performance and Scalability Management of various

components involving EXI, CCXML and SIP and systems involving RNC, MSC, UMG, HLR

Language, Tools & Technologies: C, IMS, VOIP, SS7 & SIGTRAN

Senior Software Engineer

Tala Elxsi, India

- Design and development of RIPv2 routing protocol

Language, Tools & Technologies: C, VOIP, IP Routing

Project Intern

e-Brahma Technologies

Jan-2002 – Dec-2002

- Designed and implemented a software based Learning Bridge and Router with Static routing

functionality

- Designed and Implemented a Network Traffic Monitoring tool in linux using pcap library in

Linux platform

Language, Tools & Technologies: C, pcap, pthread, IP Routing and Switching

Jun-2003 – Dec-2004

- Design and development of H244 and ISO Bonding module in the H320 side of H323-H320 IPISDN

Gateway