Software Developer Linux, C, Embedded and SIP/VOIP

Description

SKILLS

5.5 Years of Experience in the Telecommunications and Embedded Development.
I have 1 years of Experience in the Avionics software development and verification.
I have also onsite experience for the product deployment and customer issue resolution.

In the Telecommunications Industry, I have worked in the VOIP/SIP domain for the Class 4 Softswitch development. In which i have developed the various routing solution and worked on the RTP Transcoding. I have also developed the SNMP Solution for the Server. I have developed the various feature of the Class 4 Softswitch. I have also worked on the DPDK and OFP for the RTP Packet acceleration.

In the Embedded Domain, I have worked on the Product Like Taximeter and DVR. In which I have developed the various solution and worked on the ARM Platform.

I have also deploy the SQUISH on the ARM Platform which help to automate the QT Testing using Python Script.

I have worked also on the V&V of the Avionics software to achieve the DO-178B Standard.
Let me know if you need the detail information Regarding my Career.

Skills: VOIP/SIP, SNMP, Freeswitch, Embedded software development, good knowledge of Linux, Embedded 'C' , Middleware Development, Audio Transcoding, DO- 178B standard , LDRA, Doors , Matlab, V&V of Avionics software, VOIP/SIP Testing,OFP,DPDK, Sentinel

Main Skills

Other Skills

Linux

MATLAB

Scripting

CentOS

tcpdump

Digital Video Recorder

GSM

Servers

Cloud Platform

Simple Network Management Protocol

Session Initiation Protocol

Desktop Application

SNMP

version control system

Automation Testing

Network Traffic

JSON

API

Linux environment

git

grep

RHEL

Database

Verification and Validation

DSPs

Amazon Web Services

debugging

Open-source software

Transport Protocols

bash

device driver

Redis

Session Description Protocol

SVN

Open-source

Business logic

Subversion

AWS

Routing

Transcoding

Python

IP networks

iptables

MySQL

Linux command

Software development

VoIP

GPRS

Work & Experience

16.06.2014 — Now

InfoTech; Limited

Senior Software Engineer Software

01.11.2013 — 30.06.2014

8 Months Technologies

Insigno Quipment Software Engineer

01.09.2012 — 31.10.2013

E-Infochips Limited; Matrix Comsec Private Limited

Software Engineer

Matrix Comsec Private Limited, Vadodara 1 Year and 7 Months 5. Projects Single Server Solution - Class 4 Softswitch By using the Keepalived and DRBD, I have developed the single server solution of the Class 4 Softswitch. In this solution using the DUAL CPU E5-2650 v3 server, I have configured and installed the whole Class 4 Softswitch in single server. Keepalived and DRBD I have used for the recovery process in case of breakdown of the Master Server. This is very cost effective solution as only single server is required and we have achieved CPS of 100 for the 5000 concurrent Calls. SNMP Solution - Class 4 Softswitch SNMP (Simple Network Management Protocol) is an Internet-standard protocol for collecting and organizing information about managed devices on IP networks. I have developed SNMP solution for the Class 4 Softswitch. This solution provides various data like Server CPU Usage, Disk Usage, Server IP/Network Traffic Information, Call Information, Cache Server Information and Information related to Database. By using this SNMP data, we have plotted various graphs which help for monitoring and debugging purpose. Dhrupal Tilava 3 VOIP, Transcoding - HMP Solution This is the Host Media Processing Solution for the Transcoding provided by SURF. I have integrated this HMP solution with the Freeswitch using the JSON Message format. HMP solution provides more Concurrent Transcoding Calls as compare to the Hardware solution providing you have the strong High End Server. In this solution we have also provided the HA for the HMP Transcoding. RTP Packet acceleration To achieve the higher number of VOIP Calls in single Box, I have developed the solution which can provide the good RTP Processing PPS with L3/L4 Changes. In this solution I have used the OFP and ODP-DPDK to achieve the good PPS. I have also integrated the hash functionality in this OFP application to provide the L3/L4 changes with respect to incoming packets and for this I have used the RCU Library. During Lab testing, I have achieved the 5M PPS. PPS Acceleration on AWS (Amazon Web Services) Environment As Technology is moving on the Cloud Platform, I have done the product deployment on the AWS Platform and try to run maximum VOIP Calls in single AWS Instance with RTP. I enable the SRIOV in the AWS Instance to enhance the Network Performance in terms of PPS. With some Network Configurations Optimization and using SRIOV, I am able to achieve 4L PPS and able to run 4000 VOIP Calls in single AWS Instance. VOIP, Transcoding - Resource Manager In this project, I have developed the Resource Manager for SURF EXPRESS Transcoding Card. SURF Transcoding Card is providing the Transcoding solution for the various Audio Codecs. I have developed the Resource Manager which takes the Transcoding request from the FreeSwitch and according to that it configures the DSP's Channel of the SURF Card for Audio Transcoding. I have also added DTMF Detection and Conversion for In-band to Out-of-Band and Out-of-Band to In-band according to the SIP Endpoints. VOIP, Transcoding - FreeSwitch Patch for Proxy mode FreeSwitch is an Open-source platform for VOIP. In FreeSwitch, Anything that requires reading or modifying the media will not work in Proxy Media mode. So, Transcoding and Handling of In-band DTMF (Converting in either direction) is not supported in Proxy Media mode. I have developed the required solution for FreeSwitch to support the Transcoding and DTMF Conversion in Proxy Media mode only. VOIP - Class 4 Softswitch Solution (Switch Only Solution) I have developed the Class 4 Softswitch Solution on the Open-source platform FreeSwitch. I have developed the Business logic for Routing and other functionality like ANI Pool, Cause Code mapping and Stop Route Profile. VOIP - FreeSwitch Porting from CentOS to RHEL Recent Server manufacturer has stopped the support for the CentOS 5. In CentOS 6 FreeSwitch Performance is degraded and in the case of sudden High CPS changes Kernel CPU Consumption goes very high. During Testing we found that this issue is resolved in the RHEL 7. So, we port all our kernel modules and our switch application in the RHEL7. Dhrupal Tilava 4 VOIP - SBC Sentinel Licensing In SBC we have integrated the Sentinel Licensing to Provide the License. During this integration I have Developed JNI Library to Provide the Support of the Sentinel and we have also developed the HA Solution for the Sentinel Licensing. Deployment of SQUISH on the ARM Platform SQUISH is the Proprietary tool developed for the Automation Testing of the QT Application. I have deployed this tool on the ARM Platform running on SAM9G45 Atmel Processor and Integrated with SQUISH Desktop Application. It helped Very much for development of the Automation Scripts to test the Embedded QT Application. GSM-GPRS DAEMON (GGD) Development I have developed the GGD Interface for Providing GSM and GPRS Functionality in the Taximeter using Telit GL865 module. This Interface provides the Call Functionality, SMS Functionality, Auto Call Pickup Functionality, Internet Related Functionality and Configurations. EEJ - Flight Display System Application (FDSA) Verification FDSA Application was developed by Rockwell Collins for the Embraer Executive Jets. In this Project, I have done the Verification and Validation of the Avionics Flight Display System Application (FDSA) to Achieve the DO-178 Level-A Certification. I have worked the on the C, Python and different Avionics tools like LDRA, DOORS, MATLAB, CLEAR QUEST and PREP. I have also worked on the Avionics simulator VISTA. Digital Video Recorder (DVR) This was a Surveillance Product with 16 Channel, 8 Channel and 4 Channel. The 16 and 8 Channel. DVR was Developed on the Next Chip Platform and 4 Channel DVR was Developed on Hi-Silicon Platform. I have developed the different graphics layer on the Frame Buffer for displaying OSD (On Screen Display), Front Layer and Mouse Layer on the Video Output Devices. I have developed the Web-Client Application for monitoring the surveillance camera through the Web-Browser. I have developed the Date and Time module and DST (Day Light Saving) module using RTC Device Driver. I have developed the Removable Disk Manager module for taking the Backup of the Recorded Video. Others I have also worked on the Redis and MySQL while developing the Class 4 Softswitch. I have developed the HA (High-Availability) Solution for the Various SIP Servers using the Keepalived. I have developed the POC of HA using the DRBD Open-source Solution. I have also Developed the SIP Probe Functionality to check the status of the Various SIP Gateway. I have also working experience of the SIP/VOIP Testing and various tools like SiPp. I have also Installed the complete Class 4 Softswitch solution on different servers with different hardware Configurations. 6. Miscellaneous When I am not doing work related stuff, I like to play Cricket and watch the Movies.

01.01.2011 — 31.08.2012

Dhrupal Tilava 2

Software Engineer

Packet Processing: I have working experience and good understanding of the DPDK and OFP (Open Fast Path). I have developed the Application using the ODP-DPDK and OFP to achieve the 5M PPS for the RTP with L3/L4 Patches. I have also done R&D of the PPS on the AWS Platform using SRIOV. Linux environment and tools: I have working experience and knowledge of Linux command line and common tool such as bash, make, grep, patch, diff, netstat, tcpdump, tcpreplay, find, ethtool, arp, chkconfig, vnstat, vim, git, gdb, valgrind, top, sar and mount. I have also used the Subversion version control system (SVN). I have primary working experience on the Linux iptables. Avionics Platform: I have worked on the Verification and Validation of the various Avionics Application for the Rockwell Collins. I have also knowledge and working Experience of the DO-178B Certification.

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