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 translate business needs into technical solutions
* Mentor and support other engineers, driving best practices and quality standards
What we're looking for
* ~5 years of professional software development experience
* Bachelor's or Master's in Computer Science
* Expert in C# and .NET
* Experience with AI tools (GitHub Copilot, LLMs, AI agents)
* Strong understanding of AI concepts (RAG, prompt engineering, agents)
* Fluent English (written and spoken)Strong problem-solving skills and ability to handle complex logic
* Proven experience leading technical projects or mentoring teams
Nice to have
* Experience in fintech or financial services
What's on offer
* Highly competitive salary and benefits package
* Stability and growth within a leading European company
* Continuous training in AI and cutting-edge technologies
* Modern offices in central Madrid with flexible working hours
About E-Frontiers
E-Frontiers is a specialist technology recruitment company connecting top tech talent with innovative product companies across Europe. We focus on long-term matches, transparency, and an excellent candidate experience.
If this sounds interesting, apply directly or reach out for a confidential chat.
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