Rohit is available for hire
Hire RohitRohit Kulkarni
Verified Expert in Engineering
IoT Developer
Mumbai, Maharashtra, India
Toptal member since November 19, 2019
Bio
Rohit has a master's degree in computer science from the University of Southern California and 10+ years of experience with various programming languages including C, C++ and C#. Having worked on a wide range of products from tiny ARM M0 based devices to REST APIs on the cloud, he has a solid understanding of software at all the different layers. He has previously worked at Microsoft and has also co-founded an IoT startup.
Portfolio
DSPWorks
C#, C++, C
Experience
- Linux - 7 years
- C++ - 6 years
- STM32 - 5 years
- Embedded C - 5 years
- Windows - 4 years
- MySQL - 3 years
- C# - 3 years
- Qt - 1 year
Availability
Part-time
Preferred Environment
Real-time Operating System (RTOS), Git, Linux, Windows
The most amazing...
...project I've led is the entire software suite for a home automation system from the firmware on ARM M0 based smart devices to the cloud's DB.
Work Experience
Principal Software Architect
2014 - 2019
DSPWorks
- Established the entire software stack for a home automation system from firmware to cloud.
- Implemented firmware on ARM M0+ based devices on MQX using C.
- Implemented the embedded gateway on TI RTOS using C.
- Implemented the smart gateway on an SBC running Linux using C++.
- Created an Android app for communicating with custom hardware over Bluetooth using Xamarin and C#.
- Designed and implemented the encryption of wireless data over the extremely low-bandwidth RF channel.
Technologies: C#, C++, C
Contract Developer
2013 - 2014
Ingenero, Inc.
- Developed a high-performance server for communicating with thousands of IoT devices using C++ and MySQL.
- Wrote a test suite that could simulate thousands of devices to test the server's performance under extreme network load using C++.
- Developed a secure protocol for IoT to cloud communication using OpenSsl.
- Collaborated with the hardware team to help test the firmware.
Technologies: C++
Project Staff
2011 - 2013
Indian Institute of Technology
- Helped with board-bring-up and initial debugging of the custom hardware.
- Got U-Boot and Linux running on the new hardware.
- Developed a driver for a Maxim chipset-based E1 to Ethernet convertor using C++.
- Wrote scripts to automate testing of end-to-end communication between two devices.
Technologies: C++
Software Development Engineer
2007 - 2009
Microsoft
- Worked on measuring and improving the performance of the MediaRoom DVR's UI.
- Refactored legacy code to make it unit testable and wrote unit tests for it.
- Designed and developed new DVR features.
- Independently handled the lifecycle for the features implemented by me.
Technologies: C#
Experience
Vibe Smart Homes
Vibe Smart Homes is a retrofit home automation solution designed for the Indian household. It is a suite of smart devices including smart switches, curtain controllers, LED dimmers, gas sensors, IR emitters, etc.
As the principal software architect, I was in charge of the team that built the entire software solution from firmware to mobile apps to cloud. I developed most of the firmware and the Linux-based smart gateway software as well as provided the team with high-level design for the mobile apps and the cloud including the DB design.
As the principal software architect, I was in charge of the team that built the entire software solution from firmware to mobile apps to cloud. I developed most of the firmware and the Linux-based smart gateway software as well as provided the team with high-level design for the mobile apps and the cloud including the DB design.
Microsoft MediaRoom
https://en.wikipedia.org/wiki/Ericsson_MediaroomMediaRoom was Microsoft's end-to-end IPTV solution and the first live product I ever worked on (the business was later bought by Ericsson). I was part of the dynamic team that was responsible for the managed code of the DVR component on the set-top box (STB).
As a fresh grad, I was fortunate to work with some of the best minds in the industry. All of the managed code was written in C# using the .NET Compact Framework. Until I joined the team, I had never seen any C# code but, with the help of the team, I was writing production code in less than a couple of weeks. And in less than a year's time, I was independently implementing as well as managing the lifecycle of new features for the DVR!
At Microsoft, I learned how to apply my raw programming skills to write production quality code using best practices, TDD, Scrum, and more.
As a fresh grad, I was fortunate to work with some of the best minds in the industry. All of the managed code was written in C# using the .NET Compact Framework. Until I joined the team, I had never seen any C# code but, with the help of the team, I was writing production code in less than a couple of weeks. And in less than a year's time, I was independently implementing as well as managing the lifecycle of new features for the DVR!
At Microsoft, I learned how to apply my raw programming skills to write production quality code using best practices, TDD, Scrum, and more.
Biker Radio
The "Biker Radio" (internal code-name as the product is yet to be released) is a battery operated wireless radio for group communication. It has the following peripherals:
1. TI audio codec for real-time audio capture and playback
2. BLE module for communication with mobile apps
3. SemTech's LoRAWAN-based low-power radio module for wireless communication
4. STM32 based low-power MCU for integrating all of the above peripherals
I designed and developed most of the firmware including the code for the SPI, I2C, I2S and UART interfaces using the STM Cube and LL libraries.
I also developed the Xamarin Forms-based mobile application that allows the user of the hardware to create groups, add friends, and view the location of all members of the group even without a cellular network.
1. TI audio codec for real-time audio capture and playback
2. BLE module for communication with mobile apps
3. SemTech's LoRAWAN-based low-power radio module for wireless communication
4. STM32 based low-power MCU for integrating all of the above peripherals
I designed and developed most of the firmware including the code for the SPI, I2C, I2S and UART interfaces using the STM Cube and LL libraries.
I also developed the Xamarin Forms-based mobile application that allows the user of the hardware to create groups, add friends, and view the location of all members of the group even without a cellular network.
Education
2005 - 2007
Master of Science Degree in Computer Science
University Of Southern California - Los Angeles
2001 - 2005
Bachelor's Degree in Computer Science
University of Mumbai - Mumbai
Skills
Libraries/APIs
Standard Template Library (STL), OpenSSL
Tools
IAR Embedded Workbench, Keil, Eclipse IDE, Visual Studio, GNU Debugger (GDB), GitLab, Bitbucket, Git
Languages
C++11, Embedded C, C++, C#, C++14, C#.NET, C, XAML
Paradigms
Test-driven Development (TDD)
Platforms
Linux, Windows, STM32, TI-RTOS
Storage
MySQLi, MySQL
Frameworks
Qt, Boost
Other
Embedded Software, MQX, ARM, Real-time Operating System (RTOS), Xamarin.Forms, Cryptography
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