rob

@rwitoff

Chief Technology Officer @Coinbase

Austin, TX

witoff.medium.com

Joined June 2008

rob
@rwitoff
Aug 6
Our Q2 Solana Validator Report is here. Skip rate is down to to 0.035% for our bare metal validators. Most of our clients are running Harmonic (76%), but also Jito (19%), JitoBAM (5%) and Firedancer in reserve. All with industry leading scale & security.
Q2 2026 Solana Validator Performance Report
From coinbase.com
rob
@rwitoff
Jul 30
Building open, permissionless systems is foundational to crypto and is just as critical for the future of AI. That’s why @coinbase signed @Microsoft’s open letter. Powerful tech shouldn’t be locked behind walled gardens. We’re excited to build a stronger ecosystem of American
Brad Smith
@BradSmi
Jul 30
Since launching last week, more than 230 companies and organizations from across the tech sector have signed the "Open Weights and American AI Leadership" open letter. We want to thank these partners for standing up and publicly supporting broader access to AI innovation. A
rob
@rwitoff
Jul 27
Some news: I've started my next tour of duty as CTO @coinbase. In 2009 I got hooked on Bitcoin empowering builders with programmable money. In 2014 I joined Coinbase as an engineer because there was no better place to build it. Back then we ran on Heroku and supported one asset
rob
@rwitoff
Jul 27
Apple is dropping Rosetta, which will finally kill the macOS window manager I've been using for 10+ years. So I had an agent rebuild it in modern swift, import my old keybindings, fix a few bugs and make much snappier. 30 minutes and $3 in tokens for the final loop to finish
rob
@rwitoff
Jul 14
The fundamentals of engineering haven't changed, but the daily work has. We're managing agents, building loops and taste and judgment matter more than ever. So we rebuilt how we hire engineers from scratch to match how we build. Here's what we've been up to @ Coinbase:
coinbase.com
Interviewing Engineers in the AI Era: Lessons from a Year of Rebuilding
TL;DR: Now that nearly all of our new code is AI generated and overseen by humans, we’ve rebuilt our engineering interview loop to keep pace, testing how candidates direct AI, evaluate its output,...