Rule Writer

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 with teams in Amsterdam and Leeuwarden and other banks 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 Belgian payment 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.