SecondHQ, a new Bitcoin development lab, has gained attention recently as it drew in yet another former Blockstream employee known as “Grubles”, with over 8 years of engineering at the company. Bark, SecondHQ’s lead product, promises to deliver a next-generation “Fast, low-fee, self-custodial” wallet. 

After 8+ years, today is my last day at Blockstream.

It’s been an incredible opportunity to work with such a world class team on both the marketing and engineering side, and words alone do not convey my gratitude for the experience.

Even though I’m leaving, I’m super excited…

— grubles (@notgrubles) March 3, 2026

Alongside Grubles, other former Blockstream employees…

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