Summary:

·  Maharshi Dayanand University, CRSCE, Murthal B.E. Electronics & Communications, 1995 - 1999

Skills Summary:

Professional Experience:

Role: Android Architect

Project: PayRange Android

Description: PayRange is startup based out of Silicon Valley. It is the simplest payment solution for machines.

Responsibilities:

·  Working on the PayRange Android App for features, enhancements and bug fixes.

·  Helped improved Android App rating from 3.5 to 4.3 in three releases by re-hauling the UI and improving UX.

·  Resolved BLE-WiFi interference issues and made UX much better.

·  Integrated Open Source Card Reader SDK from PayPal.

·  Implemented run-time permissions for Marshmallow and above.

·  Worked with Android BLE stack as well as implemented material design.

·  Implemented HTTPUrlConnection based backend interaction with PayRange Web Services and removed Default HTTP Client implementation.

·  Migrated codebase from Eclipse to Android Studio. Reviewed iOS code.

·  Implemented Rating functionality at different trigger points.

·  Developed certain endpoints on NodeJS backend

·  PayRange is available on Google PlayStore and AppStore

Role: Android Developer

Project: Nimbuzz, Holaa!

Description: Nimbuzz is an Instant Messenger and Internet Telephony Application available on Android, iOS, Windows Phone and Desktop.

Responsibilities:

·  Acted as Scrum Master in agile mode and also contributed to different features, issues and enhancements.

·  Lead development of features such as Group Chat, and Chat-rooms for the Android Application. I contributed to both UI and App backend.

·  Lead and implemented Facebook integration, Message Queuing, call register, C2DM/GCM push notifications support, Animated Ads and rich media support.

·  Rehauled the Advertisement module to a more modular design.

·  Implemented Phonebook-Nimbuzz Roster synchronisation for the Nimbuzz App for Android.

·  Led UI overhaul to new design making use of Material Design concepts.

·  Implemented LRU cache mechanism in android for Avatars.

·  Implemented UI using  Loaders and fragments along with SQLite storage

·  Implemented network protocol using XMPP version for language and location list retrieval.

·  Overhauled ICE-UDP implementation & Fixed issues in Stun server and Stun client.

·  Contributed to code and architecture of the Holaa! Application which is a Caller Identification and Spam call blocking app similar to TrueCaller.

·  Lead from scratch for development of VoIP on Windows Phone 8 and also VoIP media engine replacement for Android, iPhone, and Desktop platforms.

·  Lead performance optimizations in various spheres: RAM usage, Battery Consumption, CPU utilization.

·  Coordinated with QA and Product Management in release sprints.

·  Fixed various issues from field and QA

·  Nimbuzz, Holaa! available on google playstore, Nimbuzz available on AppStore

Role: Software Consultant

Project: Quiz, Weather, Snake Applications

Description: InfoURGE is a software consulting company.

Responsibilities:

·  Worked on Web and Android development.

·  Developed App prototypes such as Weather App, Quiz App and a Javascript based snake game.

·  Coded the main activities such as splashscreen, quiztopic, question selector, questionlayout, gameinfo for the Quiz App.

·  Worked on the database module dbhelper in assets directory for Quiz App.

·  Build layouts in XML such as gameinfo.xml, main.xml, questionlayout.xml, questionselector.xml, splash.xml, Added animation for splashscreen.

·  Added code for table layout in javascript for the game boundaries.

·  Introduced activity to load the index.html file where the Javascript bound code resides.

·  Added modules for movingsnake, foodplacement and gamecontroller

·  Added buttons and tied them to Javascript code

·  Tested on emulator and finally deployed on Huawei Android phone (ideos x5 Android 2.2).

·  Used SQLite, Async Task for Quiz App whereas a third party JSON web service for weather application.

Role: Principal Engineer

Project: Open Cloud- Nokia, HNS, VoIP

Description: Hughes Systique is a software consulting and products company based out of Gurgaon, India.

Responsibilities:

·   Worked on Open Cloud and Satellite Communication System Component for HNS

·   Implemented finite state machines of  Service in Java and Eclipse with OpenCloud SDK

·   Ported proxy component of HNS Satellite Communication in C++ and Solaris

·   Wrote Unit test cases using the unit test framework

·   Guided a junior team member on the project.

·   Implemented and ported VoIP client for Android.

·  Used Android NDK and C++ code for media engine and SIP protocol for signalling.

Role: Senior Module Leader

Project: Traffic Endpoints Application, Avaya Communication Manager

Description: Avaya is Communications Solution Company headquartered in Denver, Colarado. I worked at their India office in Pune.

Responsibilities:

·   Developed traffic endpoints SIP simulator application to test the SIP proxy.

·   Wrote enhancements to this Swing based application.

·   Wrote SSL/TLS implementation in traffic application to secure the RTP stream.

·   Implemented network outage, reboot, failover functionality for SIP endpoints supporting TLS/TCP connections during mass registrations & active traffic.

·   Implemented Client side of Session Timers in the traffic application.

·   Added features as these were updated in Main SIP proxy application to keep the simulator up to date for testing the main application.

·   The Avaya Communication Manager work involved fixing field issues in a C++ codebase.

·   Fixed COR issues, Voice Announcement, QSIG Call Forwarding issues etc.

Role: Systems Engineer

Project: IMS (IP Multimedia Sub-system)

Description: Veraz Networks was Communications Solution Company headquartered in San Jose, CA. I worked at their India office in Pune.

Responsibilities:

·   Worked on IP Multimedia System components such as Proxy-CSCF, MGCF

·   Wrote functional specifications for different features.

·   Involved in writing & reviewing FSDs for different features like emergency, ENUM, Resource Priority, Privacy etc, PCSCF.

·   Worked on SIP stack integrated in P-CSCF.

·   Implemented in C++ codebase- the Session timers based on RFC 4028

·   Implemented the Registration-Subscribe-Publish feature that lets clients subscribe to registration events in Proxy-CSCF.

·   Tested system end-to-end for sanity.

Role: Team Leader

Project: MGCF Development for Wireless Softswitch

Description: Alcatel is a telecommunications company. I was based out of their Noida office.

Responsibilities:

·   Identified areas of enhancements in Call Control modules and SIP stack elements for MGCF functionality.

·   Modified the old design document

·   Wrote code for routing functionality

·   Guided team members in their individual efforts.

·   Articulated & discussed the requirements for the other elements.

·   Wrote System Integration Test Cases

Role: Senior Member of Technical Staff

Project: Next Generation Services

Description: Persistent Systems is a software services company, I was based out of their Pune office.

Responsibilities:

·   Worked on Class 5 features for Veraz Gateway.

·   Implemented the Call transfer functionality where in one leg was on SS7 and other leg on SIP.

·   Implemented the call forwarding no answer service

·   Implemented the  Open Settlement protocol OSP service

·   Wrote service interaction logic where the state machine keep track of different services currently handled by the end points and the service interaction thereof.

·   Involved in System integration effort with SIP based IADs.

·   Led a team of size 3.

·  The services were written in XML on a C++ engine based on JSLEE specifications.

Role: Senior Software Engineer

Project: UTStarcom VoIP Gateway

Description: Mascon Global is a software services company, I was based out of their Bangalore office. I performed System Testing for UTStarcom Internet Telephony Gateway. I also Executed test scenarios for services such as Three Way Calling, Call-hold etc.

Responsibilities:

·   Tested three way calling with cisco phones as endpoints

·   Load tested using Hammer.

·   Tested the call transfer service

·   Tested the call forwarding, Do Not Disturb services.

·   Interop testing for PSTN to SIP IP endpoints.

·   Executing test cases PSTN to H.323 endpoints.

·  Created bug/issue reports in Proxy Server for SIP protocol adherence

Role: Senior Software Engineer

Project: GNP Computers' Natural Clustering Technology, ADC Softswitch

Description: Worked on Fault Tolerant, parallel Systems based on Clustering and PLinda Model. The SDK allowed VoIP components to be written in a distributed programming way and allowed natural fault tolerance. Also worked on heart of Internet Telephony System, the Call Control based on Intelligent Network Capability Set 2 (IN CS2) as well as on gateway protocol MEGACO.

Responsibilities:

·                     High-level design of the framework of Clustering Technology.

·                     Component design (Coding, Unit Testing) of following modules in Clustering project:

◦          Tuple space module - maintains & works on client application data.

◦          Persistent module: this module recovers application specified critical data in case of double failure.

◦          Switchover Functionality that makes client application to switch to a hot standby server when Master Server fails.

◦          Replication Functionality needed to keep application specific data in synchronization at Master & Backup Server.

◦          Discovery protocol: decides the role of Master & Backup Server in the system.

·                     Developed & performed SSI for User Interaction Component in Bearer

·                     Control (BC) Module in Softswitch.

·                     Developed under competitive time frame & appreciated by team lead for

Code readability, modularity, & extensibility.

·                     Fixed software problems and Performed regression testing of BC.

·                     Integrated SECC with BCCAS (Bearer Control and Channel Associated

Signalling) module.

·                     Wrote Element Management Simulator using Plinda library

·      Developed an algorithm for preventing Referral Code Fraud for Smart Phone Applications. Wrote an algorithm to prevent Head of Line Blocking in HTTP/1.x.

·      Developed a sporting community aggregator with responsive design www.playpark.in.

·      Some of my HTML5, Javascript, Jquery micro-projects are available here: http://codepen.io/collection/DQbZmj/.

·      Developed News Publishing prototype (Available on bitbucket) with Java, HTML5, CSS, Spring Boot, Spring Data, Spring Security, Solr Search Engine, and MongoDB.

·        Developed QR Coupon reader  application (Available on bitbucket) which can scan coupons and gives an alert when user enters the location where coupon is valid.