Frontend Engineer, Marketing

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.

Cartesia is hiring a Frontend Engineer, Marketing to build and optimize the surfaces where customers first experience our product. You’ll own the technical execution of our marketing website and growth surfaces, working closely with design, product, and GTM to drive conversion, pipeline, and product adoption.

This is a highly impact-oriented role: your work directly affects how customers understand Cartesia and whether they choose to engage.

• Own the marketing frontend:
  Build, ship, and maintain high-performance marketing pages and interactive experiences.
• Drive conversion:
  Partner with design and GTM to implement experiments, iterate quickly, and optimize for conversion and engagement.
• Enable iteration:
  Build clean, flexible frontend systems that make rapid testing and content updates easy.
• Collaborate cross-functionally:
  Work closely with designers, product engineers, and marketing to translate positioning into performant, production-ready experiences.
• Care about fundamentals:
  Ensure pages are fast, accessible, responsive, and SEO-friendly.

• Strong frontend engineering fundamentals (HTML, CSS, JavaScript) and experience with modern tools (e.g. React, Tailwind, Type Script).
• Comfortable using modern AI coding tools (e.g. Cursor, Claude Code) to rapidly implement designs and experiment without sacrificing quality.
• Familiarity with SEO, performance optimization, and modern CMSs (e.g. Sanity, headless CMSs).
• A growth mindset: you drive towards metrics like conversion, engagement, and funnel performance, and are pragmatic about tradeoffs.
• Experience building and shipping marketing or growth surfaces, not just product UIs.
• Comfort owning projects end-to-end, from implementation through iteration and optimization.
• Ability to work closely with designers and translate high-fidelity designs into polished, performant experiences.
• Comfort giving and receiving direct feedback grounded in business goals.

• Experience with A/B testing, analytics, or experimentation tooling.
• Experience working on developer-focused or technical products.

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.