Madrid - AI Engineer
- Level
- Mid
Not stated in the posting: salary, work type, visa.
Open. First seen 3 October 2026.
About the role
Our Culture
An exciting aspect of joining a newly created business at this stage is the opportunity to be in from the start and help define the culture. Part of this role will be to help build the culture and environment in Madrid as we expand our footprint.
There are things that we won’t compromise on though:
- We are looking for exceptional talent with excellent communication skills
- Collaboration is key, both internally and with our clients. We believe we do our best work when we are together and working hand in hand with business users
- Curiosity is something we embrace and value highly
- We want people who are positive and passionate, have proven problem solving capabilities, can work quickly to find solutions to complex challenges and unlock big opportunities
- People need to be able to take ownership and be trusted to deliver, going the extra mile when needed - we don’t believe that the value of AI comes from models alone
- We want people who are highly motivated and have a high desire to learn
Responsibilities
- Ownership of technical products and projects with AI at their core – our engineers actively engage with a wide range of business functions to leverage their deep machine learning knowledge and exposure
- Design and delivery of systems and machine learning models that solve commercially impactful real world problems
- Framing business problems and commercial opportunities into AI problems - judgement and acumen to understand the true business need beyond the stated requirements
- Challenging current systems and processes to achieve common goals through technical excellence and innovation
- Keeping abreast of progress in AI and technology trends that will keep us at the forefront of what is possible
- Having impact from day one – we empower and trust our AI engineers to leverage their skillsets
What makes a great candidate
- Deep understanding of theoretical machine learning fundamentals as well as practical knowledge of how to build real world ML systems
- Direct experience leveraging LLMs in production, and an in depth understanding of prompt design, agentic workflows, eval harnesses, retrieval pipelines, etc.
- Exposure to LLM inference stack fundamentals such as KV Caching, Speculative Decoding, Parallel Decoding, and test-time compute ideas.
- Excellent programming, technology, and system design skills, including an in-depth understanding of and recent programming experience with Python and ideally one of C++, Java, or .Net
- Experience working with SQL databases
- Azure or AWS experience
- A strong enthusiasm for programming and technology and an appetite to work in a dynamic and integrated team
- An entrepreneurial nature, willing to take ownership and run towards problems and someone who thrives on innovation
- The ability to own all aspects of an AI project from start to finish
- A desire to understand and solve business problems, build domain knowledge and increase market understanding
- The ability to communicate clearly and professionally with our clients as well as team members
- Financial Services experience a bonus, but is not essential
- Bachillerato grades of 9.0 and above, and at least a 7.0 in a bachelor’s degree in computer science, mathematics, a hard science, or a related field from a top university
Why join us?
- Push the boundaries of what is possible, and re-imagine how bleeding edge AI can be used to deliver commercial value
- You can have an impact from day one – we empower and trust our engineers to leverage their skillsets
- Work on a wide variety of projects alongside exceptionally talented people, often closely correlated to world events and trends
- Deliver demonstrable business value working hand-in-hand with the customer
- Learn from industry experts on how financial markets and world economies work
- Ownership of technical products and projects – our engineers actively engage with a wide range of business functions to leverage their knowledge and exposure
What this role asks for
Standard for data science / ML roles
LLM · Machine Learning · SQL
Common in data science / ML postings at any company.
In most of Neptune North's ads
Python
Named in most of its open postings, whatever the role.
Read against Neptune North's other open postings on this site.
The team: Technology
This role is one of 9 open in Technology.
WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS
Python (9 of 9), Java (6 of 9), AWS (5 of 9), C# (5 of 9), SQL (5 of 9), .NET (4 of 9), Azure (4 of 9)
OTHER ROLES ON THIS TEAM
- Platform Engineer (Core AI Team) posted Aug 19
- Madrid - Software Developer posted Jul 15
- Madrid - Data Engineer posted Jul 15
- Test Automation Engineer posted Jun 11
- Newcastle - Data Engineer (All Levels) posted Jun 11
- Newcastle - Software Developer (All Levels) posted Jun 11
- DevOps Engineer posted Jun 11
- Graduate Software Developer (2027) (Newcastle) posted Apr 24
From the team and dates on Neptune North's own job board.
Similar jobs
- Software Engineer - Data Science & AI at Euromonitor
Shares 8 skills: .NET, Java, Azure… · same seniority - Delivery Senior Consultant, AI and Analytics Solutions at Deloitte
Shares 8 skills: .NET, Java, Azure… - Senior React Full stack Developer at Lemon.io
Shares 8 skills: .NET, C++, Java… · ✓ Visa sponsorship - Software Engineer (Application Development) at X-PHY
Shares 8 skills: .NET, C++, Azure… · same seniority - AI Security Engineer at Charles Schwab
Shares 6 skills: .NET, Java, Azure… · same seniority - Senior Machine Learning Engineer (Defence) at Neptune North
Also at this company
Is this your posting and you want it taken down? Email info@careerholo.com.