AI Engineer - Internship

Founded in 1856, Banque Internationale à Luxembourg is the oldest multi-business bank in the Grand Duchy. From its foundation, the BIL has always played an active role in the development of the Luxembourg economy. It currently operates in retail, private and corporate banking, as well as on major capital markets. Employing more than 2 000 people, BIL is present in the financial hotspots that are Luxembourg, Switzerland, and China.

As a major player in Luxembourg's finance industry and as a signatory of the UN Principles of Responsible Banking, BIL is committed to handing over a responsible and sustainable bank to future generations.

Mission

You will support the Head of CoE Data & AI Modeling and the Advanced Analytics team in designing, developing, and operationalising AI solutions across the bank. Your work will contribute directly to the transformation of BIL's data landscape through intelligent automation, document understanding, and the industrialisation of machine learning and LLM-based systems.

The role is highly technical and hands-on, sitting at the intersection of software engineering, data science, and operational excellence. Curiosity, pragmatism, and strong engineering discipline are all essential.

You will help make AI delivery faster, more robust, and more reliable by (i) developing and testing AI components, (ii) automating model deployment workflows, and (iii) preparing committee-ready documentation and technical materials.

Main duties

1. AI model development & experimentation

• Build and refine components for OCR, classification, text extraction, and LLM-based retrieval.
• Clean and prepare datasets for model training (unstructured documents, metadata, historical archives).
• Evaluate model performance through structured metrics and testing frameworks.
• Document experiments, results, and lessons learned.

2. AI pipelines & automation

3. LLM engineering & prompt optimisation

4. AI governance & documentation

5. Ad hoc analytical & engineering support

Profile

Technical skills

Knowledge of banking processes, credit risk, or financial documents (contracts, balance sheets, KYC documents) would be considered a strong advantage.

Working style

BIL offers a wide range of challenging AI and data projects and diverse career paths. We will assist you in identifying the opportunity that best matches your skills and aspirations. Your personal development is our priority, and we strongly encourage you to explore different areas of the bank for a broad and enriching experience.

BIL firmly believes that diversity & inclusion foster collective performance. We are committed to creating a culture of inclusion that encourages individual development with equal opportunities for all.

NB : The selected candidate will be asked to provide an extract from the criminal record (no. 3) as evidence of integrity and justified with regard to the specific needs of the position to be filled. Other documents will be collected, to the extent legally permitted, to perform background checks.

BIL offers a broad range of challenging projects and a huge choice of career paths .We will assist you in finding the one that best meets your skills and expectations. Your personal development is our priority and we greatly encourage you to dive into different business areas for the broadest possible experience.

BIL is firmly of the opinion that diversity & inclusion contribute towards increasing the collective performance of the Bank. We are committed to creating a culture of inclusion that encourages individual development with equal opportunities for all.

NB : The selected candidate will be asked to provide an extract from the criminal record (no.3) as evidence of integrity and justified with regard to the specific needs of the position to be filled. Other documents will be collected, to the extent legally permitted, to perform background checks.