Lead Frontend Engineer

The role

You will lead the design and development of the user-facing side of an agentic system. You will work across interface design, component libraries, and frontend infrastructure to create user experiences for desktop, browser, and filesystem.

What you will do

• Design and development of browser-based and desktop interfaces
• Building and maintaining component libraries and styling systems
• Researching and refining user flows based on real-world usage and feedback
• Prototyping and implementing UI features in collaboration with ML, backend, and systems teams
• Making a complex AI product feel simple, accessible, and empowering

Required qualifications

• Strong frontend engineering skills with fluency in HTML, CSS, and JavaScript/TypeScript
• Experience with modern frontend frameworks such as React
• Demonstrated attention to UI detail and usability, with a user-first mindset
• Ability to prototype and iterate quickly, both in code and with design tools like Figma
• Experience designing and developing responsive, accessible, and high-performance interfaces
• Strong intuition for HCI principles, accessibility, and visual clarity
• Excellent collaboration and communication skills

Nice to have

• Experience designing or building browser extensions or desktop applications (e.g., Electron, Tauri)
• Experience with mobile platforms and responsive design
• Prior work on products involving complex workflows, automation, or agentic behavior
• Interest or experience in backend development, APIs, or AI systems
• Familiarity with accessibility standards and inclusive design best practices
• A track record of launching polished and user-loved products
• Passion for systems-level thinking: building reusable design systems, libraries, and scalable patterns
• A clear, opinionated eye for elegant design and user delight

Benefits

• Comprehensive medical, dental, vision, and FSA plans
• Competitive compensation and 401(k) plan
• Relocation and immigration support on a case-by-case basis
• In-office snacks and meals provided
• Unlimited PTO and company holidays

About the company

Zyphra is an artificial intelligence company based in San Francisco, California. They value deep research, engineering excellence, and new ideas.