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Hayden Bleasel

Hi, I’m Hayden Bleasel.

I design and build software on the internet. I’m originally from Sydney, Australia and currently living in San Francisco, California 🇺🇸.

I work on the DX team at Vercel, where I focus on the developer and end-user AI experience through building open source libraries and tools, such as Streamdown, AI Elements and Remend.

After hours, I run Haste where I create high-quality software for the internet such as Ultracite — a highly opinionated, zero-configuration linter and formatter. It's used by Vercel, Adobe, Clerk, Profound, Axiom, Tencent and even some government institutions.

Follow me on X, or join my mailing list for infrequent updates.

Work

Previously, I was the Chief Product Officer at Corellium. I moved to Delray Beach, Florida in 2021 to lead the Product, Design and Support teams. Corellium was acquired by Cellebrite in 2025.

Before that, I was Director of Jellypepper, an award-winning digital agency for disruptive startups. We worked with early stage tech companies in niche areas such as self-driving car tech, AI, biotech, crypto, drone delivery, cybersecurity and even orbital (outer space) logistics. Jellypepper was acquired by Raw Studio in 2024.

Earlier in my career, I was Head of Product and Design at Spaceship (later acquired by eToro); contracted for many clients through R/GA, interned at Palantir as a product designer in Palo Alto, California and a handful of other roles you can read about on my LinkedIn.

I've been fortunate to work with many great companies such as Australian Ethical, Canva, Clipchamp, Google, National Geographic, Nike, R/GA, Timberland, Toyota, Westfield and many more. I also rebranded ESLint and redesigned the Node.js website.

Speaking

I’ve spoken at events and been interviewed for some magazines. If you’d like to interview me or invite me to speak, let me know.

Stack

Software I use, apps I love, and other things I recommend: