We’re looking for someone who loves building things, solving problems, and architecting systems that will scale. The goal is to dramatically reduce lead times, improve quality, and enable more efficient manufacturing at scale.

This is a founding software engineering role: you won't inherit a playbook, you'll help write it. One day you might be shipping a new product feature end to end, the next building a multi-agent pipeline that reads an engineering drawing, tuning prompts and evals against production data, or standing up the infrastructure that lets us move faster.

What you’ll do

Ship new product features end to end - design, build, test, deploy
Build and refine AI pipelines, multi-agent systems, and the evals that keep them honest in production
Own backend services and APIs from data model to endpoint (Python / FastAPI / Postgres)
Build data pipelines for model training, evaluation, and continuous improvement
Run experiments, internal and in production, to find what actually wins and retains users
Make the architecture and technical calls that scale with the company

Who we’re looking for

We care more about what you've built than where you trained or how many years you've logged.
High ownership and a strong bias toward shipping: you see what needs to happen and make it happen
Has owned a production system end to end: designed it, shipped it, kept it running
Has built and deployed real AI/ML features in production, and knows how to measure their reliability
Strong full-stack engineer, fluent in Python / FastAPI
Comfortable with LLM orchestration and agent architectures
Thrives in ambiguous, early-stage environments

Nice to haves

Agent-evaluation techniques and tools for measuring reliability
Cloud infra, containerization (Docker, Kubernetes), and CI/CD
Prior startup experience
CAD / Autodesk Fusion experience, or a mechanical engineering background
You build with AI tools natively: Claude Code, MCPs, agents, whatever's latest, and have tuned your setup to maximize output

How we work

Everyone owns problems end to end and ships to production constantly
We measure iteration in days, not months
AI-native by default - we use Claude Code, Cursor, and modern AI tooling daily, and expect the team to move fast because of it

Technology

Next.js, TypeScript, FastAPI, Python, Postgres, Supabase, AWS, Vercel, Cloudflare

Benefits

Competitive salary + meaningful equity
100% medical, dental, and vision
401(k) retirement plan
Daily lunch
Flexible time off
Latest hardware and unlimited Claude + OpenAI access

Why Join

You'll be one of the earliest engineers helping build technology at the intersection of AI and manufacturing.

If you want to help reinvent how physical products get built, we’d love to talk.

Founding AI Software Engineer at Prototyping.io