Raluca Musaloiu-E.

Engineer at @Waymo. Former engineer at Sierra, Cruise and Meraki.

[Raluca Musaloiu-E. @ralucam]

Took my first @Waymo highway ride from Mountain View to San Francisco and I still can’t get over how good it was. Incredibly smooth, calm, and just magical! ❤️

[SpaceX @SpaceX]

Falcon lands for the 600th time!

[NASA @NASA]

1972 ➡️2026
Apollo 17 ➡️ Artemis II

[Raluca Musaloiu-E. @ralucam]

Go for launch!! 🚀🚀🚀

[Raluca Musaloiu-E. @ralucam]

T-15h until the launch of Artemis II. So excited for the first human lunar flyby in 50 years! 🚀

[Raluca Musaloiu-E. @ralucam]

@btaylor Fantastic work Sierra! Ghostwriter is going to make agents so much fun to build 👏👏👏

[Raluca Musaloiu-E. @ralucam]

Just watched the @projecthailmary movie (thanks @WilliamBryk and Exa for the the screening!). Loved it! ❤️. Highly recommend, especially if you enjoyed The Martian!

I think reading the book after the movie is still super fun and engaging.

[Sierra @SierraPlatform]

https://t.co/LUo5t8Zylp

[Raluca Musaloiu-E. @ralucam]

Weekend #GoldengGateBridge sunset run

[Raluca Musaloiu-E. @ralucam]

One more bridge sunset run to end the year and an incredible first year at @SierraPlatform! I’m grateful for all the amazing people I’ve met and the exciting problems we get to work on 🚀.

Happy New Year, everyone! Wish you an amazing 2026! ❤️

[Raluca Musaloiu-E. @ralucam]

Cold, sunset bridge run ☀️🎄

[Bret Taylor @btaylor]

Sierra uses 15+ frontier and open source models for low latency tool calling and decision-making, precision classification, long-context reasoning, and empathy/tone. We call this a constellation of models, and it’s a key ingredient to the state of the art performance of agents built on Sierra https://t.co/aG4duGABPE

[Raluca Musaloiu-E. @ralucam]

Sunset #GoldenGateBridge run

[Raluca Musaloiu-E. @ralucam]

Proud of the progress we've been making at Sierra! 🚀

[Bret Taylor @btaylor]

Sierra just hit $100M in ARR, just seven quarters since we launched in February 2024. @claybavor and I are very grateful to our customers and proud of the Sierra team, who has redefined the meaning of intensity and craftsmanship. I have never had this much fun in my career. (Photo is Clay signing the contract that crossed the $100M mark) https://t.co/RxPdSH7Olp

[Raluca Musaloiu-E. @ralucam]

This is going to be amazing!

[Sierra @SierraPlatform]

T-minus 24 hours until the Sierra Summit keynote begins. New products, inspiring customer speakers, and 350+ top agent builders from groundbreaking companies. Follow along live tomorrow on LinkedIn and X.

[Bret Taylor @btaylor]

Rather than relying on manual checks or static rules, Sierra’s platform enables you to use AI supervisors and monitors to make agents dependable — correcting them in real time, and continuously evaluating the quality of every conversation https://t.co/tsnSFJDZO4

[Bret Taylor @btaylor]

We're excited to host Sierra Summit — our first customer event — in San Francisco on Wednesday, November 5th.

@claybavor and I will be joined by Caryn Seidman Becker (CLEAR CEO), Fiona Tan (Wayfair CPO), and Moshe Pridan (SiriusXM CPO), and other leaders shaping the future of applied AI from The Cigna Group, Fox Broadcasting, DIRECTV, and Safelite.

We can’t wait to share all the new ways businesses can build their brands, grow their revenue and improve their margins with Sierra. Learn more and request your spot here: https://t.co/JcjonTlUo3

[Bret Taylor @btaylor]

Sierra agents can be published on your web site, integrated with your mobile app, answer the phone - and now they can also be published to ChatGPT so you can directly reach hundreds of millions of consumers with your agent.

Since OpenAI announced ChatGPT apps two weeks ago, we've heard from our customers that they want two things: a direct customer relationship and the ability to reach customers where they already are. We don't think you should have to choose. With Sierra, you can build once and run everywhere.

Here's a demo of an agent I built to show how it works. And our blog post is here: https://t.co/f76FFTkwEK

[Raluca Musaloiu-E. @ralucam]

Mission Bay evening run. October weather is amazing in #SanFrancisco 😍

[Sierra @SierraPlatform]

Debugging software is hard. Debugging agents is harder. The solution: Agent Traces.