Full Stack Engineer

Quantix Search; San Francisco (CA); Hybrid; USD 140,000 - 200,000; Full time

Job summary

Quantix Search is seeking a founding Full Stack Engineer in San Francisco, CA, offering $140K-$200K plus equity. The role is hybrid (3+ days/week) and involves shaping product and technical foundations from an early stage.

You will own frontend, backend, and AI workflows, collaborating directly with the founders to ship features and AI-enabled experiences in production. Ideal candidates have 1-5 years of software engineering and a passion for AI.

Qualifications

• 1-5 years of software engineering experience (open to exceptional grads).
• Strong full stack fundamentals across frontend + backend.
• Experience building and shipping production software.
• Interest in AI products and early stage environments.
• High ownership and comfortable operating with ambiguity.

Responsibilities

• This is a true full stack role with ownership across frontend, backend and AI workflows.
• You’ll work directly with the founders to build product features, design backend systems, and ship AI enabled experiences into production.

Skills

Full stack

Frontend & Backend

AI interest

Job description

Full Stack Engineer | San Francisco, CA | $140K-$200K + Equity

Hybrid (3+ days/week)

We're partnered with an early stage startup building AI powered software to improve how go-to-market and product/engineering teams collaborate and execute.

Backed by top tier investors with ~$3M raised and seeing strong early traction, they’re now hiring a Founding Full Stack Engineer to help shape the product and technical foundation from an early stage.

This is a true full stack role with ownership across frontend, backend and AI workflows. You’ll work directly with the founders to build product features, design backend systems, and ship AI enabled experiences into production.

What we're looking for:

• 1-5 years of software engineering experience (open to exceptional grads)
• Strong full stack fundamentals across frontend + backend
• Experience building and shipping production software
• Interest in AI products and early stage environments
• High ownership and comfortable operating with ambiguity

If you enjoy broad ownership, moving quickly, and building from 0-1,