# Founding Engineer

> Weekday AI · San Francisco, United States · Full-time · Posted 2025-07-29

**Salary:** USD 140,000–200,000

**Workplace:** on_site

**Department:** Weekday's Partner Client

## Description

This job is for a client of Weekday. One of the fastest growing YC startups. We will fast track your application if you apply here.

### About Us

We’re an early-stage startup building AI-driven tools that help consumer apps optimize user experiences automatically. Our product is already live and used by millions globally, with rapid month-over-month growth.

We’re backed by top-tier investors and operators, and we’re just getting started.

Raised more than $5mn and recently launched the product

### The Role

We’re hiring a full-stack engineer to help us build and scale our AI-powered experience editor. You’ll work across the stack—front-end and back-end—and play a key role in shaping the product and infrastructure.

This is a high-impact role with lots of ownership, fast iteration, and exposure to real-world scale.

### What You'll Do

-   Build core features of our AI-driven editor and experimentation platform
-   Write scalable back-end code and ship clean, intuitive UIs
-   Integrate new APIs and AI models to power smart user experiences
-   Collaborate closely with founders and customers
-   Own projects end-to-end in a fast-paced, hands-on environment

### Details

-   Full-time, in-person role based in San Francisco (Mon–Sat)
-   Must be authorized to work in the U.S.

## Requirements

### What We're Looking For

-   3+ years of software engineering experience
-   Strong problem-solving ability and a bias for action
-   Comfortable working across the stack (Python, React, etc.)
-   Prior experience building user-facing products
-   Strong communication and collaboration skills

### Nice to Have

-   Experience with AI/ML tools or APIs
-   Familiarity with mobile platforms
-   Past experience at an early-stage or fast-growing company

## Apply

[Apply at Weekday AI](https://apply.workable.com/weekday-1/j/6D523EC42B/apply)

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