Product Designer

Simile is The Simulation Company. We simulate human behavior to keep people at the center of the decisions that shape the world. With AI, anyone can create a product, a campaign, a policy, or a script — the bottleneck has moved upstream. The hard question is no longer whether you can create something, but what to create, for whom, and how to bring it to life. Those are fundamentally human decisions, and they shouldn't be left to chance or handed off to an algorithm. We're building the infrastructure to understand human behavior at scale and to represent humans in an increasingly agentic world. Our mission is to simulate all eight billion people on earth. We launched five months ago. Since then we've grown revenue 5x, built a new foundation model for human behavior that has run tens of millions of simulations for F100 enterprises, trained a first-of-its-kind confidence model that predicts the accuracy of every simulation, and released the first product that lets organizations verifiably predict the future. The world's leading companies use Simile to make business-critical decisions — from consumer leaders like CVS Health and Wealthfront to professional services organizations like Deloitte and Gallup — strategizing product launches, entering new markets, and forecasting earnings calls. We've raised over $200M at a $2B post-money valuation led by Greenoaks, with Index Ventures, Hanabi, A*, Bain Capital Ventures, and CVS Health Ventures. We've grown from a small home in Palo Alto to a global team of 50+, and we're building a team of the best researchers, engineers, designers, and operators in the world. The future is too important to be left to chance.

You'll join our Product & Design team and own significant product surfaces end to end. The job is to make probabilistic concepts like populations, uncertainty, and confidence structurally sound and visually obvious, for a Fortune 100 executive with a nine-figure decision to make. Our users are sophisticated and their stakes are high. Clarity is not a nice-to-have; it is the product. In this role, you will: Design new surfaces from scratch: Take on 0-to-1 problems where there is no existing product category to reference. Define the interaction model rather than inherit one. Make complexity legible: Turn simulation outputs, confidence scores, and population-level behavior into interfaces that enterprise decision-makers can read, trust, and act on. Move between systems and craft: Own information architecture, interaction models, edge cases, and how features compose with each other. Own the typography, motion, and detail that make a product feel considered. Both, not one. Ship code: Make small-to-medium front-end changes yourself with AI tooling and engineering support, so your design intent survives contact with production. Evolve the design system: Help take us from single-product to multi-product, so quality holds as we scale rather than degrading with every new surface.

Must Haves 0-to-1 design experience: You have designed products or features without an obvious reference point: novel interaction paradigms, new categories, or problems where the right pattern had to be invented. Both visual and systems design: You are strong at high-craft visual design and at the underlying structure. We are not looking for someone who does one and delegates the other. Enterprise product experience: You have designed for enterprise customers and understand designing for expert users, high-stakes workflows, and complex data. Clarity of thought: You can explain why a design is right, take a position, and hold a high bar while moving quickly.

Founding or early-startup experience. Experience designing for AI-native or agentic products. Experience designing data-dense interfaces such as analytics, research tools, or anything where the job is making complex information legible. An interest in the underlying science: behavioral research,