We speak fluent Bluetooth.

(Sometimes we eat, sleep and breathe it too.)

We’ve been building connected products since 2009. Our diverse team has expertise in every layer from hardware to software to web.

Meet the Team

Coughlin

James Coughlin

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Ashish Derhgawen

Karelkalthoff

Karel Kalthoff

Karpfinger

Colin Karpfinger

Ck

Charlie Kellerman

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Zach Michel

Coughlin

James Coughlin

Hardware/Firmware Engineer, Minneapolis

“I'm a hardware and firmware engineer who enjoys maneuvering through massive Class I rapids in a canoe.”
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Ashish Derhgawen

Software Engineer, San Francisco

“I love writing code that interacts with our physical world. I also enjoy playing music, mountain biking and learning about electronics and ham radios.”
Karelkalthoff

Karel Kalthoff

Firmware Engineer, Minneapolis

“Outside of developing embedded systems and optimizing bluetooth, I can be found perusing antique stores and occupying coffee shops.”
Karpfinger

Colin Karpfinger

Founder and CEO, San Francisco

“I founded Punch Through in Minnesota before our HQ moved to San Francisco. California has better beaches and surf spots.”
Ck

Charlie Kellerman

Hardware & RF Engineer, Minneapolis

“I have a strong background in EMI and Reciever Desense mitigation. Outside of the RF "dark magic” realm I enjoy all things snow with a good hearty beer.”
Zmichel pic

Zach Michel

Firmware Engineer, Minneapolis

“I’m a Firmware Engineer with a focus on Bluetooth Low Energy. Outside of work, I enjoy biking, IPAs and Coen Brothers' movies.”
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Matt Rengo

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Mike Waddick

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Gretchen Walker

Cheeyi

Chee Yi Ong

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Adam Wolf

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Garrett Sundin

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Matt Rengo

VP of Engineering, Minneapolis

“I manage client relations, keep our engineering projects on track, and everybody's heads shaking in response to my terrible jokes. I enjoy bicycling, hiking, and getting swole.”
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Mike Waddick

VP of Operations & Business Development, Minneapolis

“I work on hardware design and build cool stuff in the MSP. On weekends, I like to camp with friends and throw cooking parties.”
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Gretchen Walker

Software Engineer, San Francisco

“I am a software engineer currently focusing on iOS development. I enjoy traveling, living next to the Pacific ocean, and cheese.”
Cheeyi

Chee Yi Ong

Software Engineer, Minneapolis

“I develop Android and iOS apps here at Punch Through. I'm also passionate about gaming, photography, food and coffee.”
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Adam Wolf

Software Engineer, Minneapolis

“”
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Garrett Sundin

Software/Firmware Engineer, Minneapolis

“I’m a programmer with an emphasis on the web stack. I also love fixing, making, and eating technology. My favorite dessert is raspberry pi.”

One big happy family

Made possible by the magic of the Internet.

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