ING Security Engineer interview questions & guide 2026

The following questions are representative of the patterns observed in recent ING interview cycles. While specific technical queries may evolve, these categories reflect the core competencies required for the Security Engineer role.

Technical Competency and Security Fundamentals

These questions assess your foundational knowledge of security principles and your ability to apply them to real-world scenarios.

• How would you secure a microservices architecture deployed in a public cloud environment?
• Can you explain the difference between symmetric and asymmetric encryption and provide a use case for each?

Preparation for ING should be structured around demonstrating both deep technical expertise and a collaborative, pragmatic mindset. You should be prepared to go beyond theoretical knowledge and explain the "why" behind your technical decisions.

Role-related Knowledge – You must demonstrate a solid grasp of security frameworks and cloud-native security. Interviewers are looking for candidates who understand how to apply security controls in complex, distributed systems without hindering business velocity.

Problem-solving Ability – You will be evaluated on your ability to break down ambiguous, high-stakes problems into actionable steps. Focus on articulating your thought process clearly, demonstrating how you weigh risks against operational requirements.

Collaboration and Influence – Security at ING is a team sport; you will frequently work with developers, product owners, and risk management teams. You should be prepared to discuss how you communicate technical risks to non-technical stakeholders effectively.

The interview process at ING is characterized by a high degree of structure, reflecting its corporate nature. You can expect a professional, efficient, and thorough evaluation that aims to test both your technical depth and your alignment with the bank’s operational standards. The process typically moves at a steady pace, with clear communication from the recruiting team.

This visual timeline illustrates the typical progression from initial HR screening to technical and managerial interviews. Use this to pace your preparation, ensuring you have enough time to review technical fundamentals before the deeper functional rounds. Remember that the process is designed to be rigorous, so treat every conversation as a critical opportunity to demonstrate your expertise.

Security Architecture and Design

This area tests your ability to build security into the foundation of products. Strong candidates demonstrate a proactive approach to risk, considering security from the initial design phase rather than as an afterthought.

• Threat Modeling – Understanding and applying methodologies like STRIDE.
• Cloud Security – Knowledge of shared responsibility models in AWS or Azure.
• Identity and Access Management – Deep understanding of OAuth2, OIDC, and Zero Trust principles.

As a Security Engineer, your primary objective is to enable the business to operate securely at scale. You will act as a consultant and a technical lead, driving initiatives that reduce the attack surface of the bank’s digital infrastructure.

Your day-to-day work involves collaborating closely with software engineering teams to ensure that security requirements are met during the development lifecycle. You will perform security reviews, guide teams on secure coding practices, and participate in the design of security-focused infrastructure components. You are expected to be a proactive force, identifying potential risks before they materialize into incidents and fostering a culture of security awareness across the organization.

A successful candidate for this role possesses a blend of hands-on technical skills and the ability to navigate a large, complex organization.

• Must-have skills – Proficiency in cloud security (AWS/Azure), deep understanding of networking protocols, and experience with modern CI/CD security integration.
• Nice-to-have skills – Experience with Infrastructure-as-Code (Terraform/Ansible) security, familiarity with financial sector regulations (GDPR, PCI-DSS), and contribution to open-source security projects.
• Experience level – Typically, candidates should have several years of experience in security engineering or a closely related role, with a proven track record of securing high-traffic applications.

Q: How difficult are the technical interviews? A: The technical interviews are rigorous and designed to test your critical thinking. Expect challenging questions that require you to apply your knowledge to complex, realistic scenarios rather than just reciting definitions.

Q: What is the culture like at ING? A: ING is described as a professional, corporate, and structured environment. While some may find it stiff, it is a highly stable and well-organized place for engineers who value clear processes and professional development.

Q: How long does the hiring process usually take? A: While it can vary, the process is typically well-structured with quick replies from the recruitment team. Expect a series of 3 to 4 rounds, moving from HR to technical and managerial stakeholders.

Q: Are there remote or hybrid work options? A: ING typically follows a hybrid model, though specific expectations depend on your location and team. Be sure to ask your recruiter about the specific requirements for your office.

• Prepare for the "Why": Don't just explain how you would solve a problem; be ready to explain why your solution is the most secure and efficient choice for a bank.
• Structure your answers: Use the STAR (Situation, Task, Action, Result) method for all behavioral and scenario-based questions.
• Research the domain: Familiarize yourself with the specific security challenges facing the banking industry, such as digital identity theft and API security.
• Be honest about your limits: If you don't know the answer to a highly specific question, explain your methodology for finding the answer rather than guessing.

Securing a role as a Security Engineer at ING is an excellent opportunity to influence the security posture of a major financial institution. By mastering the core technical concepts, practicing your system design skills, and demonstrating a collaborative approach to problem-solving, you can significantly improve your chances of success.

The process is demanding, but it is also a testament to the high standards ING maintains for its engineering teams. Prepare thoroughly, stay confident in your expertise, and ensure that your professional communication reflects the seriousness of the role. For additional insights and to track your progress, continue exploring resources on Dataford. You have the capability to succeed; stay focused and approach your upcoming interviews with a clear, strategic plan.

The salary module provides insights into compensation trends for this role. Use this data to benchmark your expectations and prepare for potential discussions regarding total compensation, including performance-based components typical for financial institutions.