Minimal AI (YC S25)
Full-Stack Developer
Minimal AI (YC S25)Netherlands6 days ago
Full-timeEngineering, Information Technology

About Minimal AI


We’re building AI agents that resolve customer support tickets for e-commerce businesses autonomously, end-to-end. They cancel orders, issue refunds, check inventory, talk to suppliers, and continuously improve.


To make this scalable, we’re building an AI Manager: a higher-level agent that trains, monitors, and optimizes Support Agents with minimal human input — effectively an AI-run support team. We’re a YC-backed company.


Role: Full Stack Engineer


We’re looking to hire two Full Stack Engineers, each with a different primary focus:


- Product / frontend-focused engineer

- Backend / systems / AI-focused engineer


Both roles are full stack and you’ll work across the entire system, but you’ll lean strongly toward one of these areas.


## Product / Frontend-Focused Engineer


You lean toward product, UX, and user experience. You care deeply about how things feel and how users move through the system.


You’ll focus on:

- Building interfaces and workflows for the self-serve AI Manager

- Designing intuitive dashboards, setup flows, and tooling

- Talking to users to understand what’s missing and iterating quickly

- Making complex AI systems feel simple and usable


## Backend / Systems / AI-Focused Engineer


You lean toward systems, AI infrastructure, and reliability. You care about correctness, scalability, and leverage.


You’ll focus on:

- Building the agent runtime and execution layer

- Designing evals, monitoring, and feedback loops

- Integrating with external systems (e-commerce platforms, suppliers, tools)

- Improving reliability, performance, and observability as we scale


What You’ll Do (Both Roles)


- Ship production features across the stack

- Own features end-to-end, from idea to rollout

- Work in tight loops: **build → test → measure → refine**

- Use AI tools daily (Cursor, Claude, etc.) and push them further:

 - automate glue work

 - generate scaffolding

 - build evals

 - multiply your own output

- Take ownership of outcomes, not tickets


What We’re Looking For


We don’t care about years of experience.  

We care that you can build real things.


You Might Be a Fit If


- You enjoy owning features end-to-end

- You ship fast and care about quality:

 - clean architecture

 - solid tests

 - good UI (even if it’s not your main strength)

- You’re resourceful and persistent — you figure things out

- You’ve built things you’re proud of (products, open source, side projects)

- You use AI tools daily and want to keep raising that bar

- You think in systems and multipliers, not just tasks


Tech Stack


- Backend: Python, FastAPI, AWS  

- Frontend: TypeScript, React, Next.js


Interview Process


- Intro Call – 30 mins with a founder  

- Deep Dive – 45 mins on product & technical fit  

- Technical Interview – 60 mins coding & design challenge  

- Onsite Co-Work – Build and ship a real feature with us  

- Offer

Key Skills

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