Frontend Software Engineer | React | Next.js | TypeScript | Frontier AI Startup

Frontend Software Engineer | React | Next.js | TypeScript | Frontier AI Startup Must Have Startup Experience & CS foundation from a top programme Salary: $180,000 - $225,000 + meaningful equity Location: San Francisco, CA (5 days onsite) Eligibility: Must be a US or Canadian resident. Required: React/Next.js, TypeScript, zero-to-one product delivery, VC-backed startup experience, Strong CS foundation from a top programme - (Non-Negotiable) 🚨 Non-Negotiables - Please only apply if you have ALL of the following 🚨 Core technologies: Proficient in TypeScript (this is tested in the technical screen) Production experience building UIs with React and Next.js Comfortable building fast, responsive interfaces on a data-intensive product Strong CS foundation from a top programme Environment: Strong experience in a fast-moving, VC-backed startup or scale-up Shipped zero-to-one product features end-to-end with visible business impact Able to own features end-to-end and iterate fast with high autonomy Comfortable working onsite 5 days a week in San Francisco Key skills: 3 to 6 years of frontend engineering experience Strong grounding in modern frontend architecture and performance Ability to build polished, intuitive interfaces that thousands of users touch daily High-level written and spoken English for a sharp, collaborative team Role Overview We're partnered exclusively with one of the fastest-growing AI companies in San Francisco. Seriously well-funded, moving at real pace, and hiring hard as they scale. This is a chance to join early and own a huge amount from day one. This is a hands-on frontend role for someone who wants massive ownership. You'll build cutting-edge, intuitive interfaces on a data-rich product, shipping to production daily and working shoulder to shoulder with engineers, researchers and product to turn ideas into polished, real-world features. Key Responsibilities Ship polished, high-performance UI features used by thousands of people every day Build fast, responsive interfaces on a complex, data-heavy product Design and build interfaces that surface complex, AI-driven solutions to customers Iterate rapidly with the wider team to deploy new features fast Stay ahead of modern frontend tooling and raise the bar on the product Nice to Have Experience building data-heavy or ML-powered user interfaces at production scale Familiarity with TailwindCSS, Node.js, tRPC, PostgreSQL, or AWS Track record of high personal achievement in fast-growing environments If you tick every box, thrive in a high-ownership startup, and can be onsite in San Francisco, we'd love to hear from you.