SENIOR FULL-STACK ENGINEER (FOUNDING TEAM)

About

EXXA is a startup building infrastructure for AI agents and vibe coding, on hardware users actually own and control.

We believe the next era of software development happens in personal, secured environments: your own machine, your own server. Not someone else's cloud. We're building the layer that makes that possible.

We're a small founding team (5 people across Grenoble/Paris/NYC), well-funded ($3.4M raised), and shipping fast.

Job Description

• Own significant parts of the platform, from developer console to agent runtime
• Architect systems where AI agents execute tasks, manage state, and deploy applications
• Shape product decisions alongside the founders
• Experiment relentlessly: How much of development can we hand to agents? Where are the hard limits?
• Location : Remote (European timezones preferred)
• Contract : Full-time (competitive salary + equity)
• Starting date : As soon as possible
  
  

Preferred Experience

What motivates you

You were skeptical of AI coding tools at first.

You watched others widely overestimate the performance of these models and trust their result blindly.

But you saw the potential!

So you kept experimenting, testing new tools, new models, new workflows. You developed an intuition for when to intervene and how to build trust.

You experienced first hand the switch from a smart autocomplete to this alien technology and you're now obsessed with making it efficient, reliable and maximizing AI leverage.

Who We’re Looking For

You are a great fit if you are either:

• A backend developer with strong systems knowledge who can contribute to frontend development and DevOps.
• A frontend developer with an eye for UX and the ability to go dive into the backend when needed.
  
  

Our stack: We use Bun, Deno, TypeScript, React, Python, PostgreSQL, Kubernetes.

Qualifications

• Strong programming fundamentals and system design knowledge
• Proficient in TypeScript/React and Python
• Experience with modern web development practices and tools
• Proven track record of shipping production-ready code
• 3-5+ years of professional software development experience
• Familiarity with Python ML stack (PyTorch, HuggingFace, etc.) is a plus
  
  

Recruitment Process

How To Apply

Send an email to [email protected] with your resume and:

• Your portfolio / github: Show us the project you are most proud of (side projects, weird experiments, and tools you built). Feel free to share anything, even your first projects :)
• Your dev setup: Tell us how you use AI today. What tools, hacks, or workflows have you built to boost your productivity?
• Your hot take: What is the biggest bottleneck in AI coding agents right now?
  
  

If you're obsessed with the future of AI-assisted development, apply! Even if you don't check every box.

Additional Information

• Contract Type: Full-Time
• Start Date: 01 February 2026
• Location: Paris, Grenoble
• Experience: > 3 years
• Possible full remote