About Cartesia

Our mission is to build the next generation of AI: ubiquitous, interactive intelligence that runs wherever you are. Today, not even the best models can continuously process and reason over a year-long stream of audio, video and text—1B text tokens, 10B audio tokens and 1T video tokens—let alone do this on-device.

We're pioneering the model architectures that will make this possible. Our founding team met as PhDs at the Stanford AI Lab, where we invented State Space Models or SSMs, a new primitive for training efficient, large-scale foundation models. Our team combines deep expertise in model innovation and systems engineering paired with a design-minded product engineering team to build and ship cutting edge models and experiences.

We're funded by leading investors at Index Ventures and Lightspeed Venture Partners, along with Factory, Conviction, A Star, General Catalyst, SV Angel, Databricks and others. We're fortunate to have the support of many amazing advisors, and 90+ angels across many industries, including the world's foremost experts in AI.

About the Role

We are seeking an experienced and highly motivated Executive Assistant to support our Co-Founder & CEO. This role is ideal for someone who thrives in a fast-paced, high-growth startup environment and has prior experience supporting a founder/CEO. You’ll act as a true strategic partner—keeping the CEO organized, focused, and effective while enabling them to spend time on the highest-leverage priorities.

This is an in-person role based in our San Francisco office.

Your Impact

• Executive Support & Prioritization

  • Manage complex and rapidly evolving calendars, prioritizing with sound judgment.

  • Anticipate needs, ensure the CEO is fully prepared for meetings, and act as a gatekeeper to optimize time and focus.

  • Handle highly confidential information with discretion and professionalism.

• Operations & Execution

  • Coordinate and manage logistics for meetings, board sessions, investor updates, and other internal events

  • Draft agendas, take notes, synthesize key discussions, and track follow-ups to ensure decisions turn into action.

  • Own travel planning, itineraries, and expense management.

• Cross-functional Partnership

  • Collaborate closely with leadership and teams across the company on strategic projects and initiatives.

  • Act as an extension of the CEO in driving clarity, follow-through, and accountability across stakeholders.

  • Build strong relationships internally and externally

What You Bring

• 3+ years of Executive Assistant experience supporting senior executives in a high-growth tech startup environment, ideally with at least 2+ years directly supporting a Founder/CEO

• Exceptional organizational skills and attention to detail; able to manage competing priorities in a dynamic environment.

• Strong written and verbal communication skills with the ability to synthesize and simplify information.

• High EQ and judgment; able to balance urgency with diplomacy.

• Proficiency in Google Workspace (Calendar, Docs, Drive, Meet) and other productivity tools like Slack and Notion.

• A proactive, resourceful, and solutions-oriented mindset.

• Integrity, discretion, and professionalism in all interactions.

• Comfortable in a fast-paced, in-office startup environment.

• Bachelor’s degree required

What We Offer

🍽 Lunch, dinner and snacks at the office.

🏥 Fully covered medical, dental, and vision insurance for employees.

🏦 401(k).

✈️ Relocation and immigration support.

🦖 Your own personal Yoshi.

Our Culture

🏢 We’re an in-person team based out of San Francisco. We love being in the office, hanging out together, and learning from each other every day.

🚢 We ship fast. All of our work is novel and cutting edge, and execution speed is paramount. We have a high bar, and we don’t sacrifice quality or design along the way.

🤝 We support each other. We have an open & inclusive culture that’s focused on giving everyone the resources they need to succeed.