Design Engineer

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 Cartesia is hiring a Design Engineer to work on React design systems and product polish on our web surfaces. Your Impact Own the appearance of our web-based surfaces, with high agency to proactively fix design and performance issues. Design and implement UI features from scratch. Work on last-mile polish, making sure every pixel counts. Develop and maintain a React design system intended to multiply product engineering velocity. Build a process that enables Cartesia to proactively identify gaps & opportunities in the design of its web surfaces. What You Bring 2+ years of experience Exceptional at both design and engineering Ability to spot pixel-level imperfections in digital interfaces; on the engineering side Proficient in TypeScript, with a focus on writing well-typed, maintainable code Portfolio (website or social profile) showcasing design engineering work Perfectionism in the fundamentals: last-mile polish, clear copy, accessibility, and web performance Experiencing developing and maintaining React-based design systems from scratch Nice-to-Haves Experience working with shadcn/ui, Radix Primitives, or Base UI Experience optimizing React interfaces to minimize renders, possibly with profiling tools like React Scan 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. #J-18808-Ljbffr Cartesia