Founding Full-Stack Engineer

This role is for one of the Weekday's clients

Salary range :   $150K - $210K  & 0.50% - 1.00% equity

Experience : 1-4+ YoE

We are building self-improving software — AI that continuously creates and tests new in-app experiences . Our mission is to automate the end-to-end process of generating and experimenting with product flows, starting with onboarding for consumer apps and expanding to experiences across the user journey.

We work with some of the largest and fastest-growing consumer apps , already serving millions of users daily. Backed by top investors including Y Combinator, Gradient, and leaders from Uber, OpenAI, Meta, and more, we’ve raised over $5M to bring this vision to life.

About the Role — Founding Full-Stack Engineer

As a Founding Full-Stack Engineer , you’ll be instrumental in designing, building, and scaling AI-driven products that reach millions of users. You’ll work directly with the founders, integrate cutting-edge AI models into real products, and own features end-to-end — from concept to deployment.

This is a full-time, in-person role based in San Francisco (Mon-Sat). US work authorization is required, but O-1 visa sponsorship is possible for exceptional candidates.

💼 What You’ll Do

• Build an AI-powered paywall editor used by millions of users daily — from the Next.js front-end to a high-performance Python backend.
• Integrate the latest AI models, APIs, and tools to enhance generation performance.
• Write and deploy Python services capable of handling thousands of global requests per second.
• Collaborate closely with founders and customers to design, implement, and deliver impactful features.
• Wear multiple hats in a fast-paced, high-ownership startup environment .

✅ What We’re Looking For

🌟 Bonus Points

⚠️ This Role May Not Be a Fit If

🖥 Our Tech Stack

💡 Some of the Challenges You’ll Tackle