We Built 2,000 Custom Electronic Badges for Our Developer Conference, Replay (Here's How)

What does it actually take to ship 2,000 custom electronic conference badges, from the concept stage to hanging around an attendee's neck? Shy Ruparel (Senior Developer Advocate) and Melanie Warrick (Senior Staff Developer Advocate, AI) walk through the hardware, firmware, and Temporal-powered backend that made the Replay 2026 badge possible. From DEF CON inspiration to last-minute on-site firmware flashing.

Read the full build log here: https://temporal.io/blog/how-we-turned-replay-keynote-surprise-open-source-embedded-playground
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