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 iOS development and PCB design, I can be found with a paintbrush in one hand and a stout in the other.”
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.”
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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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Chavon Rosenthal

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Corin Rypkema

Stack

Stephen Stack

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Mike Waddick

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Gretchen Walker

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Matt Rengo

Engineering Manager, Minneapolis

“I manage client relations and keep our engineering projects on track. I enjoy bicycling, hiking, and getting swole.”
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Chavon Rosenthal

Office Manager + Assistant + HR, San Francisco

“Coming soon”
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Corin Rypkema

Firmware Engineer, San Francisco

“I work at the intersection of software and hardware. I love to read, hike and ski. ”
Stack

Stephen Stack

Software Engineer, Minneapolis

“I'm a programming generalist who focuses on the app/OS side of things. I wear many hats, including rock-climbing helmets and gaming headsets.”
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Mike Waddick

Engineering Manager, 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.”
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Adam Wolf

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Garrett Sundin

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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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