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’re hiring our first Solutions Engineer to help turn Cartesia’s voice AI infrastructure into enterprise adoption.

Our customers are building real-time voice agents, call automation systems, and AI workflows that depend on low latency, reliability, and production-grade integration.

As a Solutions Engineer, you will partner closely with Account Executives to lead the technical side of strategic deals — from initial discovery through proof-of-concept and technical validation.

You will operate at the intersection of engineering and go-to-market, translating customer workflows and infrastructure constraints into clear architectural paths forward.

This is a high-agency, hands-on role. You’ll write code, build demos, prototype integrations, and run technical deep dives with engineering leaders. You won’t inherit a mature playbook — you’ll help build it by creating demo environments, documentation, and repeatable processes that scale as we grow.

Solutions Engineers are critical to our growth: deals close because the architecture is sound, the integration works, and the customer trusts us to power real-time systems in production.

Your Impact

• Own the technical sales cycle – Lead discovery, architecture discussions, API deep dives, and integration planning across strategic enterprise deals.
• Deliver tailored, high-impact demos – Translate Cartesia’s voice AI into customer-specific workflows that reflect real latency and infrastructure constraints.

What You Bring

• 3–7+ years of experience in Solutions Engineering, Sales Engineering, or developer-facing technical roles at a high-growth B2B SaaS or infrastructure company.
• Demonstrated ability to scope and execute POCs end-to-end — gathering requirements, building working integrations, and presenting results clearly.
• Strong engineering foundation — you can write and debug code (Python preferred), understand APIs deeply, and integrate technical products into real-world systems.

Nice-to-Have

• Hands-on experience with voice AI, speech systems (ASR/TTS), or real-time/streaming architectures.
• Multilingual fluency or experience supporting customers across international markets and non-English language deployments.
• Experience working with AI/ML APIs, LLM-based systems, or real-time inference pipelines.
• Prior experience as a software engineer or in a deeply technical role before moving into a customer-facing position.
• Experience supporting enterprise deployments across VPC or on-prem environments.
• Familiarity with developer-led or product-led growth (PLG) motions and technical buyer personas.
• Experience as an early or founding Solutions Engineer at a startup

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.