Frontend Engineer at Stealth AI-powered retention startup

Jack & Jill; San Francisco (CA); On-site; USD 120,000 - 170,000; Full time

Job summary

Jack & Jill is seeking a Frontend Engineer to lead the user-facing side of our AI-powered product in San Francisco. You will architect and own complex interfaces using React and TypeScript, working with seasoned founders to shape the frontend direction.

You will collaborate with backend, product, and design teams to deliver high-performance features, drive frontend best practices, and help scale a fast-paced startup from day one.

Qualifications

• Experience in frontend development with JavaScript/TypeScript and React.
• Experience integrating frontend apps with backend APIs while maintaining performance.
• Strong UI/UX sense and passion for intuitive, high-quality user experiences.

Responsibilities

• Architect and build robust, scalable user interfaces for new product features using modern frameworks.
• Collaborate directly with backend, product, and design teams to deliver integrated, high-performance solutions.
• Drive the adoption of frontend best practices and shape the engineering culture from the ground up.

Skills

JavaScript

TypeScript

React

Frontend development

Job description

Job Title

Frontend Engineer

Salary

Not Disclosed

Company Description

Stealth AI-powered retention startup

Job Description

As a Frontend Engineer at this stealth AI startup, you will architect and own the user-facing side of products designed to solve subscriber churn. Working alongside high-caliber founders, you’ll build robust, scalable interfaces using React and TypeScript. This role offers high autonomy to shape the frontend culture and drive the adoption of modern technologies in a fast-paced environment.

Location

San Francisco, USA

Why this role is remarkable

• High autonomy as an early hire, directly influencing the product roadmap and frontend architecture from day one.
• Backed by top-tier venture capital and founded by experienced leaders who have scaled products to millions of users.
• Solving a critical revenue problem—consumer churn—for real brands using cutting-edge AI agent technology.

What You Will Do

• Architect and build robust, scalable user interfaces for new product features using modern frameworks.
• Collaborate directly with backend, product, and design teams to deliver integrated, high-performance solutions.
• Drive the adoption of frontend best practices and shape the engineering culture from the ground up.

The ideal candidate

• Professional experience in frontend development with strong JavaScript/TypeScript and React skills.
• Proven ability to integrate complex frontend applications with backend APIs while maintaining performance.
• Strong understanding of UI/UX principles and a passion for building intuitive, high-quality user experiences.