Lead Frontend Engineer (UI/UX) – AI Agentic Systems

Symbolica AI•San Francisco, CA

133d•Onsite

About The Position

As a 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).

Requirements

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.
Passion for writing clean, maintainable, and well-documented code.
Effective communication skills and a collaborative mindset to work across diverse teams.

Nice To Haves

Experience working on machine learning and/or AI projects is a plus.
Experience building scalable, data intensive web apps, including RESTful APIs and GraphQL.

Responsibilities

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.

Benefits

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.

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