Lead Full-Stack Software Engineer (React + .NET) - €80-90K

Location: Madrid (Central) | Full-time | 100% On-site | Flexible hours
Salary: 80-90k

About the role

We are partnering with a leading European financial services company building a new innovation hub in Madrid. They are looking for a Senior Full-Stack Engineer with strong .NET expertise, a passion for AI, and proven leadership in technical delivery.

You will help shape the next generation of AI-driven advisory tools, supporting financial advisors with intelligent assistants that automate complex tasks and improve decision-making.

What you'll do

• Architect and develop scalable web applications using C# and modern .NET frameworks
• Build AI-driven features using LLMs and AI agents
• Lead technical decisions and contribute to product direction
• Apply advanced prompt engineering to optimise AI behaviour
• Collaborate with product teams to trans...