Frontend Engineer

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

Job summary

A technology startup in San Francisco seeks a founding Frontend Engineer to design AI interfaces for sales teams. This role requires over 5 years of experience in web application development and expertise in React, TypeScript, and Next.js. You will create user interfaces to enhance trust in AI, architect frontend systems, and work closely with the founding team. This position is ideal for those comfortable with ambiguity and changing priorities in a startup environment. Competitive compensation and innovative projects await in this role.

Qualifications

• 5+ years of experience in building production web applications.
• Expertise in React, TypeScript, and Next.js.
• Experience with AI-powered or real-time user interfaces.

Responsibilities

• Create user interfaces that build trust in AI.
• Architect frontend systems for quality and team velocity.
• Define API contracts and data patterns.

Skills

React

TypeScript

Next.js

Frontend architecture

API design

Collaboration with teams

Job description

About the role

You'll join Clarify as a founding Frontend Engineer, building the interfaces that bring AI to life for sales teams. You'll craft how users interact with LLM-powered features—conversational search, data enrichment, insights, and workflow automation. You'll work directly with founders to shape how AI surfaces in the product and set the foundation for our frontend architecture.

What you’ll do

• Create interfaces that build user trust in AI.
• Architect frontend systems enabling team velocity and quality.
• Define API contracts and data patterns across teams.
• Establish performance standards for data-heavy AI interfaces.Build component library and patterns teams adopt.
• Create frontend infrastructure: tooling, testing, deployment pipelines.
• Set architectural direction: state management, data fetching, routing.
• Mentor engineers, establish best practices, unblock teams.

Your background

• 5+ years building production web applications professionally.
• Expert in React, TypeScript, and Next.js stack.
• Experience building AI-powered or real-time user interfaces.
• Strong frontend architecture: state management, performance, and data.
• Comfortable with complex data structures and APIs.
• Pragmatic: balance speed with quality when shipping.
• Ship features: concept to production, testing, and monitoring.
• Strong collaboration with designers, engineers, product stakeholders.
• Startup experience: comfortable with ambiguity, changing priorities.
• Bonus: Data visualization, tables, or command palettes.