Software Engineer Resume

PROFILE:

10+ years of extensive practical experience in Software Design and Development in Networking (VoIP, SIP, H323 & Wireless) domain.
Excellent hands on experience in C and C++. Hands on Python for scripting.
Deployed and implemented Lync/Skype for Business SDN API along with Microsoft team (as a development partner from Aruba Networks). Currently, Lync SDN API is available publicly and has been consumed by enterprise giants like HP, Cisco, Nectar and Event - Zero.
Good understanding of NAT & Firewall on Aruba Controllers.
Working knowledge and good understanding of multiple RFC/Drafts of VoIP protocol.
Proof of Concept (PoC) work lead to the creation of Drafts.
Recognized for delivering features which are unique selling points for products.
Good understanding of QoS on unified communication tools like Lync, Skype & Jabber. Enthusiastic about leadership responsibilities.
Excellent troubleshooting and analytical skills.

SKILL:

Languages: C, C++, HTTP (XML), Multithread Programming

Operating System: Linux, Cisco IOS, Aruba OS

Products: Cisco Call Manager Express (CME)

Cisco IP: IP Gateway

Cisco TDM: IP Gateway, Aruba Access Points & Controllers,Aruba Service Controllers & SDN Architecture, Multitech VOIP Gateways

Network Technology: VoIP (SIP, H323), STUN, TURN, IMS Architecture

Wireless Technology, FastPath & Slow: Path switch forwarding (TCP/IP), SDN (Trema Controller), GRE Tunnel, DNS, Switching, Multicasting, UNIX OS and Internals like IPC & Socket Programming.

PROFESSIONAL EXPERIENCE:

Confidential

Software Engineer

Responsibilities:

Feature development on Confidential like Jabber, Lync, Skype & doing case study for Lync Audio call quality.
Also handling customer issues for ArubaOS Voice ALG (ArubaOS has various Voice ALG like SIP, H323, SCCP, NOE, Vocera & SVP). In addition to this, worked on wireless infrastructure of Access Point (AP) & Controller.
Lync is a unified communication that is used to make voice/video/Desktop-Sharing & File Transfer.
When Lync clients are involved in voice/video calls, media data (RTP) goes all the way from client AP Controller network switches & back to Controller AP client. using SDN/Open Flow Controller & Agent, media path can be hair-pinned at AP. This will have sufficient improvement on call quality metrics.
Service Controller will have Apps to interact with SDP/Open Flow to program the Controller/Switches to forward the RTP traffic using ZMQ API’s.
In typical deployment scenarios, Aruba Controller can only modify L2 & L3 header priority value of the media packets that are flowing downstream to Lync clients. Aruba Controller cannot control the L2 & L3 header priority value of the media packets that are originated from Lync clients.
This PoC is to have interaction between Lync clients & Aruba Controller so that Aruba Controller can influence the Lync clients to modify the L2 & L3 header priority value. This is done by sending HTTP POST message with suitable XML body containing the details of L2 & L3 priority value.

Confidential

Software Engineer

Responsibilities:

To support HTTPS (XML) message we used TLS with Client & Server authentication.
Supporting Early Media for SIP Voice ALG: Implement RFC 5009, 3959, 3960.
Enhancing the SIP ALG State machine to handle Mid - Call Messages.
Handling Wireless issues on Access Point, Controller.
Feature development and handling customer issues on Cisco voice gateways.
Products like B2BUA (also called as IPIP GW or CUBE), CME & TDM-IP GW is worked upon. All these products use both SIP & H323 protocol for signalling.
Worked on the following features:
Lossless Media Compression for SIP Trunks using G711.0: G.711 is still the dominant telephony codec in use today. However, G.711 is a high bit rate codec requiring 64 kbps of bandwidth per call per direction. G.711.0 is a lossless compression of G.711 voice payload; absolutely no loss of voice quality whatsoever & with > 50% of bandwidth reduction. With this proposal & proof of concept, we show how the regular G.711 payload will be further compressed with the lossless compression algorithm like G711.0 on IPIP GW.

We provide IT Staff Augmentation Services!

We'd love your feedback!

Resume Categories

Client Services

Job Seekers

Visa Sponsorship