
Software Engineering Manager for Cell Manufacturing Software Engineering at @Tesla #SoftwareDevelopment #AWS #Scrum #Go
San Francisco, California
Joined December 2011
- Tweets484
- Following97
- Followers105
- Likes629
Marcos - Slipmp retweeted
Ever wake up and want to build a company?
I'm building one today with @poteto & @roshan_s
teapawt.net/i/broadcasts/1AxRnZbVp…
SpaceXAI engineer (ex-Cursor):
"right now I'm running 10-20 GrokBot agents that automate 90% of my routine
i have a Chief of Staff agent. He knows about all my other bots and manages everything"
in a 50-minutes podcast, a SpaceXAI engineer showed how to build a team of agents that will work for you 24/7
worth more than a $500 course on agentic engineering
watch today, then read how to build a Grok agents team from scratch in the article below
Marcos - Slipmp retweeted
Así se ve un sueldo de 750.000 dólares al año: un tipo en camiseta blanca, un pizarrón y 2 horas y media.
Stanford, CS336. Percy Liang construye un LLM desde cero. Lo que hay debajo de Claude y ChatGPT, y arranca por la parte que todos saltan: el modelo no lee tu texto, lee números.
Anthropic paga ese sueldo a los ingenieros que entienden esa capa.
Lo único que cobra Stanford son 2 horas y media de tu atención.
Readers added context they thought people might want to know
El video es de una clase CS229 de Stanford impartida por Tengyu Ma (no Percy Liang ni CS336). Tengyu Ma es profesor asistente en Stanford sin afiliación a Anthropic.
youtube.com/watch?v=pwQ0l4…
cs229.stanford.edu
ai.stanford.edu/~tengyuma/
cs336.stanford.edu
cs.stanford.edu/~pliang/
Let's go!!
The foundations for an exciting future are being built in Texas. Next up: Terafab → spacex.com/updates#terafab
Interesting.
Grok 4.6 releases around August 7. This will be the 1.5T model with significantly improved SFT & RL.
Grok 4.7 will be the 2.1T model released a few weeks later. This will be better than 4.6 in every way, except slightly slower to serve, albeit with even better token efficiency.
In our latest deepsec.sh benchmarks, Grok 4.5 has emerged as the best cybersecurity AI model on price-performance.
It's 10x cheaper than Sol, 5.7x cheaper than Opus 5, and 2.2x cheaper than Kimi K3, yet at Kimi-like perf.
Sol remains the frontier, ahead of Opus 5.
True
Replying to @sfliberty
Warren identified the deeper problem almost a century before Ludwig von Mises and Friedrich Hayek made it famous in academic economics.
When everyone owns everything, no one owns anything. When labor earns the same reward regardless of effort, effort disappears. When prices vanish, no one knows what anything is worth.
This is awesome!!
Introducing Model Y Long Wheelbase – now available in the US & Puerto Rico
A 3-row, 6-seat configuration that brings exceptional interior space with ample headroom & legroom for all passengers
0-60 in 4.4 seconds
325 miles of range
– Front row: Heated/ventilated seats w/ powered thigh cushion
– Second row: Heated/ventilated captain seats w/ powered armrests & one‑touch fold
– Third row: Heated seats w/ power recline, one‑touch fold & child seat anchors
– Improved airflow, increased efficiency & more range
– 89 cu ft of trunk space: with 6 passengers, trunk still fits a 28" and 20" suitcase each, plus frunk holds an additional 20" suitcase. Oversized items like snowboards and bikes also fit easily
– Engineered for safety w/ seat belts & side air bag optimized for second & third row
– Upgraded acoustic glass & suspension to minimize road noise
– Adaptive damping for a smooth, stable ride
– Staggered tires for enhanced grip
– Larger tailgate for better rear visibility & bigger windows overall to deliver great views from every seat
– 16" first row & 8” second row touchscreens + 19-speaker immersive Tesla Audio
– Upgraded 50W wireless charging pads w/ active cooling & charging ports for all other seats
– FSD Supervised & integrated Grok AI
tesla.com/modely/design#over…
Excited to start using this at Work!
Grok 4.5, based on our 1.5T V9 foundation model, with Cursor data added in supplemental training, is now in private beta at SpaceX & Tesla. Early evals show performance close to, perhaps exceeding Opus.
RL is continuing to significantly improve the model, and the Grok Build harness gets better every day.
Nice work by all those involved!
Completely trained from scratch new models will be released by @SpaceX every month this year.
Grok 4.5, based on our 1.5T V9 foundation model, with Cursor data added in supplemental training, is now in private beta at SpaceX & Tesla. Early evals show performance close to, perhaps exceeding Opus.
RL is continuing to significantly improve the model, and the Grok Build harness gets better every day.
Nice work by all those involved!
Completely trained from scratch new models will be released by @SpaceX every month this year.
Grok Build daily updates
Got another update to Grok Build.....it’s receiving daily improvements at a rapid pace
Release Notes: v0.2.73
Features:
• Keep text selection highlight setting added so drag selections stay visible until dismissed.
Bug Fixes:
• Doubled lines after tab switches or focus changes in tmux or editor terminals are now healed.
• Clipboard copy now only shows success when the pasteboard actually received the text via a trusted path.
Not necessarily speaking to the whole post here just the Interesting view on Tech Leaders changing in our Software Development industry
This is an email I sent earlier today to all employees at Coinbase:
Team,
Today I’ve made the difficult decision to reduce the size of Coinbase by ~14%. I want to walk you through why we're doing this now, what it means for those affected, and how this positions us for the future.
Why now
Two forces are converging at the same time. We need to be front footed to respond to both.
First, the market. Coinbase is well-capitalized, has diversified revenue streams, and is well-positioned to weather any storm. Crypto is also on the verge of the next wave of adoption, with stablecoins, prediction markets, tokenization, and more taking off. However, our business is still volatile from quarter to quarter. While we've managed through that cyclicality many times before and come out stronger on the other side, we’re currently in a down market and need to adjust our cost structure now so that we emerge from this period leaner, faster, and more efficient for our next phase of growth.
Second, AI is changing how we work. Over the past year, I’ve watched engineers use AI to ship in days what used to take a team weeks. Non-technical teams are now shipping production code and many of our workflows are being automated. The pace of what's possible with a small, focused team has changed dramatically, and it's accelerating every day.
All of this has led us to an inflection point, not just for Coinbase, but for every company. The biggest risk now is not taking action. We are adjusting early and deliberately to rebuild Coinbase to be lean, fast, and AI-native. We need to return to the speed and focus of our startup founding, with AI at our core.
What this means
To get there, we are not just reducing headcount and cutting costs, we’re fundamentally changing how we operate: rebuilding Coinbase as an intelligence, with humans around the edge aligning it. What does this mean in practice?
- Fewer layers, faster decisions: We are flattening our org structure to 5 layers max below CEO/COO. Layers slow things down and create coordination tax. The future is small, high context teams that can move quickly. Leaders will own much more, with as many as 15+ direct reports. Fewer layers also means a leaner cost structure that is built to perform through all market cycles.
- No pure managers: Every leader at Coinbase must also be a strong and active individual contributor. Managers should be like player-coaches, getting their hands dirty alongside their teams.
- AI-native pods: We’ll be concentrating around AI-native talent who can manage fleets of agents to drive outsized impact. We’ll also be experimenting with reduced pod sizes, including “one person teams” with engineers, designers, and product managers all in one role.
In short: AI is bringing a profound shift in how companies operate, and we’re reshaping Coinbase to lead in this new era. This is a new way of working, and we need to leverage AI across every facet of our jobs.
To those who are affected
I know there are real people behind these decisions — talented colleagues who have poured themselves into this company and our mission. To those of you who will be leaving: thank you. You’ve helped build Coinbase into what it is today, and I am sincerely grateful for everything you've done.
All impacted team members will receive an email to their personal account in the next hour with more information, and an invitation to meet with an HRBP and a senior leader in your organization. Coinbase system access has been removed today. I know this feels sudden and harsh, but it is the only responsible choice given our duty to protect customer information.
To those affected, we will be providing a comprehensive package to support you through this transition. US employees will receive a minimum of 16 weeks base pay (plus 2 weeks per year worked), their next equity vest, and 6 months of COBRA. Employees on a work visa will get extra transition support. Those outside of the US will receive similar support, based on local factors and subject to any consultation requirements.
Coinbase prides itself on talent density. Our employees are among the most talented people in the world, and I have no doubt that your skills and experience will be highly sought after as you pursue your next chapters.
How we move forward
To the team that is staying, I know this is a difficult day. We’re saying goodbye to colleagues and friends you've been in the trenches with. But here’s what I want you to know as we move forward together:
Over the past 13 years, we have weathered four crypto winters, gone public, and built the most trusted platform in our industry. We’ve made it this far by making hard decisions and by always staying focused on our mission. This time will be no different – nothing has changed about the long term outlook of our company or industry. And most importantly, our mission has never been more important for the world. Increasing economic freedom requires a new financial system, and we’re building it.
The Coinbase that emerges from this will be more capable than ever to achieve our mission.
Brian
Marcos - Slipmp retweeted
Picked up a pizza order. As I walked out, an elderly couple was getting out of their new Tesla Model Y. I said, “Beautiful car.” He said, “Thank you. It’s the best car I’ve ever owned.”
I said, “Why?”
He said, “You see me—I’m 78 and can barely walk, let alone drive. I’m taking my wife out for date night again after 52 years of marriage. We couldn’t do this with our old car. I didn’t buy this to save the planet. I bought it to save me.” 😢
All choked up, I said, “Thank you for sharing. You two go enjoy your dinner!”
I see and hear this so often from elderly people buying Teslas, but it never gets old. Tesla is freedom🫶🏻



























