Founding AI Product Engineer — On-Site SF

Wintermeyer Ventures; San Francisco (CA); On-site; USD 150,000 - 230,000; Full time

Job summary

Wintermeyer Ventures is seeking a Founding Product Engineer to shape customer-facing workflows and the agent infrastructure on an AI-powered outbound sales platform. You’ll work closely with the founders to ship improvements regularly and influence product direction.

On-site in San Francisco, you’ll own end-to-end features from design through production, collaborate with customers via Slack, and build reliable, scalable workflows with Next.js, React, Python, FastAPI, and Supabase.

Qualifications

• Three to four years of engineering experience.
• Full-stack experience with Next.js, React, Python, FastAPI, and Supabase.
• Strong UX judgment alongside backend and infrastructure skills.
• A portfolio that demonstrates high engineering and product design standards.
• Experience working directly with customers and translating feedback into shipped improvements.
• Background in data science, computer science, industrial engineering, or operations, or comparable practical experience.

Responsibilities

• Build and improve the sequence and enrollment experience with per-lead customization, multiple senders, and conditional branching.
• Develop embedded AI agent workflows for drafting, research, and enrollment.
• Build evaluation and observability tools to help customers trust AI-driven pipeline workflows.
• Take existing features from early implementation to production-ready quality.
• Work directly with customers in Slack and turn feedback into product improvements.
• Refine product interactions and collaborate with founders on product direction.

Skills

Next.js

React

Python

FastAPI

Supabase

Full-stack

UX judgment

Education

Data science background

Computer science background

Industrial engineering background

Operations background

Tools

Next.js

React

Python

FastAPI

Supabase

Job description

Wintermeyer Ventures is seeking a Founding Product Engineer to shape customer-facing workflows and the agent infrastructure on an AI-powered outbound sales platform. You’ll work closely with the founders to ship improvements regularly and influence product direction.

On-site in San Francisco, you’ll own end-to-end features from design through production, collaborate with customers via Slack, and build reliable, scalable workflows with Next.js, React, Python, FastAPI, and Supabase.