Senior Frontend Engineer

This is a foundational frontend engineering role with full ownership of the product's user interface. The position involves designing and building high-performance, intuitive, and scalable frontend systems for a complex AI-driven application. The role requires strong product thinking, as many features will be defined and executed without detailed specifications., * Own and develop the frontend architecture end-to-end

• Build responsive, high-performance, and user-centric interfaces
• Translate product ideas into functional and intuitive user experiences
• Make independent product and design decisions in an ambiguous environment
• Optimize performance, data flow, and real-time interactions
• Collaborate closely with founders and engineering team on product direction

• 4+ years of experience in Frontend Engineering
• Strong expertise in React and TypeScript
• Proven experience building complex, production-level web applications
• Deep understanding of state management and performance optimization
• Ability to work across the stack when needed
• Strong product mindset and design intuition

Preferred Qualifications

• Experience with real-time systems (e.g., CRDTs, multiplayer apps)
• Experience building interfaces for AI / LLM-based products
• Familiarity with local-first architectures (IndexedDB, service workers)
• Previous experience as an early-stage or founding engineer
• Strong visual or UX sensibility

Work Environment & Requirements

• Fully on-site role in San Francisco (5 days/week)
• Candidates must be based in the Bay Area or willing to relocate prior to start
• US work authorization required or eligibility for O-1 visa

What We Offer

• Ownership of frontend for a category-defining AI product
• Direct collaboration with experienced founders and high-performing team
• Fast-paced, high-impact environment with real product influence
• Competitive compensation with meaningful equity upside, + $180,000-240,000 per year About the Company Our client is a San Francisco-based AI-native startup building a new generation of intelligent systems for knowledge workers. Their product is designed to go …

• 21 hours ago, + $180,000-240,000 per year About the Company Our client is a San Francisco-based AI-native startup building a new generation of intelligent systems for knowledge workers. Their product is designed to go …

• 20 hours ago

Our client is a San Francisco-based AI-native startup building a new generation of intelligent systems for knowledge workers. Their product is designed to go beyond traditional AI tools - it understands user context, prioritizes workflows, and proactively supports decision-making, acting as a true collaborator rather than a reactive assistant., Company Description About CyberArk , a Palo Alto Networks company, is the global leader in identity security, trusted by organizations around the world to secure human and mach… + 2 days ago, © 2026 Careerjet All rights reserved