Lead Frontend Engineer

Zyphra; San Francisco (CA); On-site; USD 120,000 - 160,000; Full time

Benefits offered by this job

Comprehensive medical, dental, and vision plans

Competitive compensation and 401(k)

Relocation and immigration support

On-site meals

Exciting team environment with Happy Hours

Job summary

A cutting-edge AI company in San Francisco is seeking a Lead Frontend Engineer to spearhead the design and development of user-facing systems. In this role, you will collaborate with engineers and researchers to create intuitive interactions with AI across various platforms. The ideal candidate is proficient in frontend technologies, especially React, and values usability and performance. This opportunity also offers generous benefits, a supportive work environment, and the chance to work on innovative projects.

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.

Responsibilities

• Lead the design and development of user-facing systems.
• Craft seamless, accessible, and intuitive user experiences.
• Collaborate with engineers, ML researchers, and backend teams.

Skills

Frontend engineering skills

HTML, CSS, JavaScript/TypeScript

React

UI detail and usability

Prototyping skills

HCI principles

Collaboration skills

Tools

Figma

Electron

Tauri

Job description

Zyphra is an artificial intelligence company based in San Francisco, California.

The Role:

As a Lead Frontend Engineer - Agentic Interfaces, you’ll lead the design and development of the user-facing side of our agentic system, shaping how users interact with AI across their desktop, browser, and filesystem. You’ll work across interface design, component libraries, and frontend infrastructure to craft seamless, accessible, and intuitive user experiences. You’ll work closely with engineers, ML researchers, and backend teams to bring intelligent agents to life in a way that’s beautifully simple and deeply useful.

You’ll work across:

• 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 for a wide range of users

Requirements:

• 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—especially with engineers, designers, and ML researchers

Bonus Skill Set:

• Experience designing or building browser extensions or desktop applications (e.g., Electron, Tauri)
• Experience with mobile platforms and responsive design (not required but helpful)
• Prior work on products involving complex workflows, automation, or agentic behavior
• Interest or experience in backend development, APIs, or AI systems to better interface with the full stack
• 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

Why Work at Zyphra:

• Our research methodology is grounded in methodical, step-by-step approaches to ambitious goals. Both deep research and engineering excellence are equally valued
• We strongly value new and crazy ideas and are very willing to bet big on new ideas
• We move as quickly as we can; we aim to minimize the bar to impact as low as possible
• We all enjoy what we do and love discussing AI

Benefits and Perks:

• Comprehensive medical, dental, vision, and FSA plans
• Competitive compensation and 401(k)
• Relocation and immigration support on a case-by-case basis
• On-site meals prepared by a dedicated culinary team; Thursday Happy Hours
• In-person team in San Francisco, California, with a collaborative, high-energy environment

We’re building something new, and we want someone excited to invent and refine what the future of agentic interfaces looks like. If that is you, Apply Today!