Lead Frontend Engineer

About the Role
As a founding Lead Frontend Engineer you will be working on a highly technical interface for deploying AI systems. You’ll take ownership of building and iterating on functional prototypes for potential customer use cases, ensuring seamless end-to-end integration across the stack. Additionally, you’ll work closely with our research team to create interactive interfaces that bring agentic systems to life.

📍 This is an onsite role based in our SF office (345 California St).

Your focus

• Own and develop a vision for how developers discover, onboard, build, and scale applications with Symbolica's new flagship product.
• Design and implement intuitive, responsive, and visually polished UI for complex systems, with a strong emphasis on usability and accessibility.
• Partner with product and design to translate abstract concepts into clear, elegant user flows and interactive experiences.
• Build, test, and iterate on functional prototypes based on real user needs.
• Collaborate with researchers, engineers, and product leads to turn ideas into polished features.
• Create and maintain a consistent design system and reusable frontend components that balance aesthetics with performance.
• Debug performance issues and run A/B tests to continuously improve UX.
• Attend developer events and workshops to introduce, prototype, and teach technical audiences how to build and deploy complex multi-agent systems.
  • Translate this external feedback to build user empathy and advocate for developer experience internally.

About you

• Excellent at translating complex ideas into simple, beautiful, and highly usable UI/UX.
• Proficient in TypeScript and React.
• Equally passionate about design and engineering – you care as much about visual polish, accessibility, and interaction design as you do about clean, scalable code.
• Comfortable prototyping quickly and shipping production-ready code.
• Experience collaborating with designers or directly owning design systems, style guides, or user interface patterns.
• Experience working on machine learning and/or AI projects is a plus.
• Experience building scalable, data intensive web apps, including RESTful APIs and GraphQL.
• Passion for writing clean, maintainable, and well-documented code.
• Effective communication skills and a collaborative mindset to work across diverse teams.

What we offer

• Competitive salary and early-stage equity package.
• A high-trust, execution-first culture with minimal bureaucracy.
• Direct ownership of meaningful projects with real business impact.
• A rare opportunity to sit at the interface between deep research and real-world productisation.