AI Engineer

AI Engineer - €50,000 - €100,000 - plus bonus - Madrid, Spain

Are you an exceptional AI Engineer with a passion for solving complex problems and building cutting-edge solutions? Join a newly established, high-impact team in Madrid that’s redefining how AI delivers commercial value across industries.

Role

This is a rare chance to be part of a brand-new venture at its inception. You’ll help shape the culture, define the technical direction, and work alongside some of the brightest minds in AI and engineering. If you're driven by curiosity, thrive in fast-paced environments, and love turning ambitious ideas into real-world impact, this is the place for you.

Responsibilities

Own and deliver AI-driven products and projects from end to end

Design and deploy machine learning systems that solve real-world business challenges

Translate commercial problems into AI solutions with strong business acumen

Stay ahead of the curve by exploring the latest in AI research and technology

Collaborate closely with business users and cross-functional teams to drive innovation

Key Skills

Deep understanding of machine learning theory and hands-on experience building ML systems

Proven experience working with LLMs in production (prompt engineering, agentic workflows, retrieval pipelines, etc.)

Familiarity with LLM inference stack concepts like KV caching, speculative decoding, and parallel decoding

Strong programming skills in Python and ideally one of C++, Java, or .NET

Experience with SQL databases and cloud platforms (Azure or AWS)

A proactive, entrepreneurial mindset with a passion for learning and innovation

Excellent communication skills and a collaborative spirit

Strong academic background : top grades in Bachillerato (9.0+) and a 7.0+ in a relevant bachelor’s degree (Mathematics, Statistics, Computer Science, etc)

Financial services experience is a plus, but not required

Benefits

Work on high-impact projects that align with global trends and events

Be empowered from day one to make decisions and drive outcomes

Collaborate with a world-class team in a dynamic, intellectually stimulating environment

Gain deep exposure to how financial markets and economies operate

Help shape the culture of a growing team in Madrid

Interview Process

1. CV Review

2. Codility Coding Challenge – Showcase your programming and ML skills

3. Aptitude Test – Speed-based assessment

4. Management Interviews – Technical and cultural fit

5. Team Technical Interview – Deep dive with future teammates

If you’re looking for a role where your technical depth actually shapes real products and you want to contribute to a team being built with intent from day one, we’d be interested in hearing from you. Submit your application to explore whether this could be the right next step in your career.

Please apply below or please feel free to share your CV with Demetrious, for a confidential discussion to learn more (dvassiliou@chisquare-group.com).

By applying to this advert you agree to your personal details being held on file in relation to this and other future relevant opportunities.