Full Stack Engineer - React.js & Python

As a Founding Full Stack Engineer, you won't just write code – you'll shape the core of a product that's already changing how companies grow. You'll own features end-to-end, from database to UI, and see your work directly drive customer success. You'll build alongside the founders, talk to real users, and make decisions that define our technical direction for years to come.

If you've been waiting for the right moment to join an early-stage company where your work genuinely matters – this is it.

• *What you’ll drive**

This is not a role where you'll be handed specs and expected to execute. You'll work on a product that's live, growing, and used daily by sales teams across Europe. You'll shape what we build and how we build it.

• *You will:**
• Own and develop core product features across our entire stack (Python/FastAPI backend, TypeScript/React frontend)
• Collaborate directly with founders and customers to conceptualize, design, and ship new features
• Make architectural decisions that balance speed, scalability, and maintainability
• Debug production issues, optimize performance, and ensure our platform stays reliable as we scale
• Contribute to a codebase that leverages cutting-edge AI – and help us push its boundaries further
• Take on whatever the moment demands – in an early-stage startup, the lines between roles blur, and that's the point

You won't just build features. You'll help build a company.

• *Who thrives here**

You've built and shipped real products before. You understand what it takes to move fast. You're energized by ambiguity, not paralyzed by it – and you'd rather ask for forgiveness than wait for permission.

You're someone who learns constantly, experiments boldly, thinks in systems – and earns trust through delivery, not promises.

• *You bring:**
• Significant experience as a full-stack engineer, ideally at a medior/senior level
• Strong backend skills in Python
• Solid knowledge in TypeScript and React
• Experience operating software at scale in production environments
• Fluent English with the ability to communicate complex technical concepts clearly

Multiple opportunities to join a fantastic business, please send CVs directly to the job advertisement or to david@wearesyntera.com