# 62: Costs a Penny to Go to the Bathroom (Repeat)

- Show: [Embedded.fm](https://hardwarepodcasts.com/podcast/embedded-fm)
- Published: 2017-10-19
- Length: 1h 05m
- Page: https://hardwarepodcasts.com/podcast/embedded-fm/2017-10-19-62-costs-a-penny-to-go-to-the-bathroom-repeat
- Listen: https://makingembeddedsystems.libsyn.com/62-costs-a-penny-to-go-to-the-bathroom-repeat

## Summary

Josh Bleecher Snyder, Director of Software Engineering at PayPal and co-founder of Card.io, discusses the development of PayPal Beacon, a Bluetooth Low Energy (BLE) hardware device for contactless payments. He details the engineering challenges of building a secure, privacy-preserving BLE peripheral, the decision to use the Go programming language for its concurrency and tooling, and the complexities of cross-platform mobile development. Snyder also reflects on his experience founding Card.io, its acquisition by PayPal, and the transition from startup to enterprise engineering.

## Chapters

- [0:06](https://hardwarepodcasts.com/podcast/embedded-fm/2017-10-19-62-costs-a-penny-to-go-to-the-bathroom-repeat#t=6) Introduction: Josh Bleecher Snyder and PayPal Beacon
- [1:14](https://hardwarepodcasts.com/podcast/embedded-fm/2017-10-19-62-costs-a-penny-to-go-to-the-bathroom-repeat#t=74) PayPal Beacon Hardware and BLE Architecture
- [8:42](https://hardwarepodcasts.com/podcast/embedded-fm/2017-10-19-62-costs-a-penny-to-go-to-the-bathroom-repeat#t=522) Privacy, Security, and Cryptography in Beacon
- [20:42](https://hardwarepodcasts.com/podcast/embedded-fm/2017-10-19-62-costs-a-penny-to-go-to-the-bathroom-repeat#t=1242) GATT Protocol and Custom Network Stack Design
- [27:34](https://hardwarepodcasts.com/podcast/embedded-fm/2017-10-19-62-costs-a-penny-to-go-to-the-bathroom-repeat#t=1654) Why Go? Concurrency, Compiler Trade-offs, and Tooling
- [41:43](https://hardwarepodcasts.com/podcast/embedded-fm/2017-10-19-62-costs-a-penny-to-go-to-the-bathroom-repeat#t=2503) Card.io Founding, Fundraising, and Acquisition by PayPal
- [48:05](https://hardwarepodcasts.com/podcast/embedded-fm/2017-10-19-62-costs-a-penny-to-go-to-the-bathroom-repeat#t=2885) Transitioning from Startup to Enterprise at PayPal
- [57:12](https://hardwarepodcasts.com/podcast/embedded-fm/2017-10-19-62-costs-a-penny-to-go-to-the-bathroom-repeat#t=3432) Computer Vision, Card.io, and Deep Learning Resources

## Topics

- [Wireless & RF](https://hardwarepodcasts.com/topic/wireless-and-rf)
- [Embedded firmware](https://hardwarepodcasts.com/topic/embedded-firmware)
- [Security & privacy](https://hardwarepodcasts.com/topic/security-and-privacy)
- [Starting a product company](https://hardwarepodcasts.com/topic/starting-a-company)
- [AI & machine learning](https://hardwarepodcasts.com/topic/ai-and-machine-learning)

## Most relevant to

companies scaling up, large enterprises

## Mentioned

- PayPal (company)
- Card.io (company)
- Beacon (product)
- Go (other)
- TI CC2540 (chip)
- Raspberry Pi (tool)
- Light Blue (tool)
- OpenCV (tool)
- Theano (tool)
- Eigen (tool)
- Docker (tool)
- Kubernetes (tool)
- Harrison Metal (company)
- Canine Ventures (company)

## Related episodes from other shows

- [Using Bluetooth Low Energy for IoT Connectivity | Blecon's Simon Ford | Internet of Things Podcast](https://hardwarepodcasts.com/podcast/iot-for-all-podcast/2024-08-20-using-bluetooth-low-energy-for-iot-connectivity-blecons-simon-ford-internet-of-t) (IoT For All Podcast)
- [A Meeting Of The Davids](https://hardwarepodcasts.com/podcast/the-amp-hour/2017-08-06-a-meeting-of-the-davids) (The Amp Hour)
- [#001: The future of Bluetooth connectivity with Blecon Founder, Simon Ford](https://hardwarepodcasts.com/podcast/coredump-sessions/2024-11-27-001-the-future-of-bluetooth-connectivity-with-blecon-founder-simon-ford) (Coredump Sessions)
- [Ep064: The COBOL Cabal, the Demoscene Bytes, and the BTLE Cure](https://hardwarepodcasts.com/podcast/hackaday-podcast/2020-04-24-ep064-the-cobol-cabal-the-demoscene-bytes-and-the-btle-cure) (Hackaday Podcast)
- [An Interview with Colin Karpfinger - Blendling Bean Brio](https://hardwarepodcasts.com/podcast/the-amp-hour/2014-12-04-an-interview-with-colin-karpfinger-blendling-bean-brio) (The Amp Hour)

## Citing this page

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