Rule Writer (Fraud detection)

REQ-10105807
15/12/2025
Fraud Management
Bruxelles, Belgique
ING Bank

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Vacancy: Rule Writer – Fraud Detection (IT Focus)

Location: Brussels, Belgium (Hybrid)

Department: Fraud & Cyber Security

Level: Medior to Senior

Language Requirements: English (mandatory), Dutch and/or French (preferred)

About the Role

At ING, we are committed to protecting our customers and society from fraud and abuse. As a Rule Writer in our Fraud Detection team, you will play a pivotal role in designing, implementing, and optimizing fraud detection rules across various banking channels. You will work at the intersection of fraud prevention, IT, and data analytics, helping us stay one step ahead of fraudsters in an ever-evolving digital landscape.

Your Responsibilities

Translate fraud threats and Modus Operandi into effective detection rules.

Develop and maintain real-time fraud detection logic for online banking, debit, and credit card transactions.

Collaborate with Fraud Investigators, Data Scientists, IT Developers, and Operations to continuously improve detection capabilities.

Analyze fraud cases and customer signals to minimize financial and reputational damage.

Contribute to the architecture and evolution of our fraud risk engine and detection systems.

Participate in cross-border collaboration withteams in Amsterdam and Leeuwarden and otherbanks in Belgium.

Who You Are

You are a proactive, analytical thinker with a passion for technology and fraud prevention. You thrive in a dynamic, fast-paced environment and are eager to make a real impact.

Must-Haves

Academic degree in a quantitative or technical field (e.g., Computer Science, Mathematics, Physics, Econometrics).

Strong analytical and problem-solving skills.

Experience with rule writing, logic design, or programming.

Proficiency in analytical tools such as SQL, Python, Jupyter Notebooks, or Elastic Search/Kibana.

Excellent communication skills in English (written and spoken).

Ability to work independently and make impactful decisions under pressure.

Nice-to-Haves

Experience with fraud detection systems (e.g., RiskShield).

Familiarity with machine learning, fuzzy logic, or modeling techniques.

Knowledge of the Belgianpayment landscape or financial services.

Fluency in Dutch and/or French

What We Offer

A meaningful role in safeguarding our customers and society.

A hybrid working model (approx. 50% remote).

A dynamic, informal environment with experienced fraud experts.

Opportunities for personal and professional growth through training and challenging projects.

A competitive salary package with flexible benefits.

A chance to make a real difference in the fight against financial crime.

Ready to Outsmart the Fraudsters?

If you're passionate about technology, fraud prevention, and making banking safer, we’d love to hear from you. Please submit your CV and a motivation letter via our application portal.

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Questions? Just ask
Sofie HELLINCKX

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Chez ING, nous voulons libérer tout le potential de nos collaborateurs, grâce notamment à une culture inclusive où tout le monde peut se développer et avoir un impact sur nos clients et sur la société. Nous veillons à ce que la diversité, l'équité et l'inclusion soient prioritaires. En tant qu'employeur souscrivant au principe de l'égalité des chances, nous ne tolérons aucune forme de discrimination, qu’elle soit liée à l'âge, au sexe, à l'identité sexuelle, à l'origine culturelle, à l'expérience, à la religion, à la race, à l'origine ethnique, au handicap, aux responsabilités familiales, à l'orientation sexuelle, à l'origine sociale ou à tout autre statut protégé par la législation. Si vous avez besoin d'aide lors du processus de candidature et/ou d'entretien, veuillez contacter le (la) recruteur(se) du poste concerné. Nous serons heureux de vous accompagner pour garantir un processus équitable et accessible. Apprenez-en plus sur notre engagement en faveur de la diversité, de l’inclusion et de l’appartenance.