Senior Frontend Developer

About the Company:

At Sybill.ai, we're building the next evolution in B2B sales – an AI-first platform that transforms how sellers work. Think of it as an intelligent sales IDE (Integrated Deal Environment), empowering sellers to focus on what truly matters: building relationships and closing deals.

Today, sellers spend 70% of their time on non-revenue activities. We're flipping this paradigm on its head. Sybill's AI lets sellers become super-performers who guide AI systems and focus on high-impact customer interactions.

Our proprietary AI technology, developed by a small but mighty team from Stanford, Harvard, and the IITs, and backed by leading investors in Silicon Valley, is not just another tool; it serves as the foundation of a groundbreaking sales workflow that delivers exceptional outcomes for our users. With 99% retention and 20x growth to $1.2M ARR last year, our customers' enthusiasm speaks for itself.

Our Engineering Culture

• Zero bureaucracy - direct access to customers and quick decision-making
• High ownership - you'll own features end-to-end from design to deployment
• Customer obsession - we build for real user needs and measure real impact
• Technical excellence - we tackle hard problems and build robust solutions
• Rapid shipping - we push code daily and see immediate customer impact

The Opportunity:

We are looking for an exceptional Front-End Engineer who can create extraordinary user experiences at the intersection of AI and human interaction.

You will be responsible for developing an intuitive and responsive user interface, as well as shaping and evolving the architecture of the project, which includes CI/CD pipelines, end-to-end tests, and core modules.

We stay updated with the latest advancements in front-end, back-end, and AI technologies. Our team utilizes tools like Cursor to enhance our workflow and rethink the nature of programming.

You should have a clear vision of what distinguishes high-quality, successful projects from others.

Our UI Stack

• React 18
• Vite
• Typescript
• Playwright and Vitest
• React Query
• Redux Toolkit
• Radix UI

Technical Skills We're Looking For

>>> React & Modern Frontend

• Deep expertise in React including hooks, context, modern patterns, and performance
• Deep knowledge of Javascript, CSS, recently released ES, CSS, and HTML features
• Strong TypeScript skills and comprehensive type system understanding
• Proficiency with styled components, Framer Motion, and custom CSS implementations
• Experience with component libraries like Radix UI
• Experience in building custom complex UI components like Dropdowns, Autocompletes/Comboboxes, Datepickers, highly interactive tables, etc.
• Understanding of good practices for state management and API fetching, knowledge of popular libraries like Redux, Zustand, React Query
• Knowledge of good testing practices

>>> AI-UX Integration

• Experience building interfaces for AI/ML products
• Understanding of streaming responses and real-time updates
• Background in handling async operations and loading states gracefully

Qualifications:

• BS/MS in Computer Science from a top US university
• 5 years of hands-on frontend development experience
• Previous experience at an AI-first startup is highly preferred
• Strong eye for design and attention to detail
• Available to work 4 days/week in Mountain View

What Sets You Apart

• Track record of building 0→1 products in the AI space
• Strong product intuition and user-centric thinking
• Demonstrated passion for coding and JS technologies
• History of creating novel interaction patterns
• Open source contributions to FE ecosystem

What We Offer:

• Competitive compensation: $155,000 - $185,000 significant equity
• Modern React-based frontend stack with a focus on developer experience
• Direct impact on product direction and user experience
• Regular UI/UX deep dives and technical discussions
• Comprehensive health, dental, vision benefits and flexible time off

If you're passionate about creating exceptional user experiences and want to work at the cutting edge of AI interfaces, we'd love to talk to you.

Note: We're looking for someone who combines technical excellence with an eye for detail and has experience shipping polished AI products.