FIS Global Security Engineer Interview: Questions & Prep (2026)

FIS Global is one of the world's largest fintech companies, providing technology for core banking, payment processing, and capital markets. In India, the company is actively hiring, with 55 Security Engineer openings listed as of mid-2026. Security Engineers here typically work on protecting financial systems, payment infrastructure, and customer data across cloud and on-premise environments, often in direct contact with third-party bank integrations.

The role sits at the intersection of application security, infrastructure security, and compliance. Since FIS processes sensitive financial data for banks and institutions globally, frameworks such as PCI-DSS and SOX form part of the daily working context. Candidates report a multi-round process that typically includes a recruiter or HR call, one or two technical rounds covering security concepts and real-world scenarios, and a final discussion with a team lead or hiring manager. Bangalore leads demand for Security Engineers in India with 69 openings currently tracked, so most FIS roles are likely based there.

These questions are commonly reported by candidates interviewing for Security Engineer roles at fintech companies like FIS Global. Prepare concrete examples from your own work for each.

1. Walk me through how you would conduct a vulnerability assessment on a system you are seeing for the first time.
2. How do you investigate a suspected data breach in a financial services environment?
3. How do you decide which vulnerabilities to fix first when you have more findings than the team can handle in one sprint?
4. Describe your hands-on experience with SIEM tools. How have you used them to detect real threats?
5. How would you build or improve a security review process for new features going into production?
6. FIS handles payment data. How do you approach PCI-DSS compliance within a development pipeline?
7. How do you secure APIs exposed to external banking partners or third-party integrators?
8. Tell me about a time you discovered a critical vulnerability. How did you manage disclosure and remediation?
9. How do you keep up with threat intelligence specific to the financial services sector?
10. A developer bypasses the mandatory security review to hit a deadline. What do you do?
11. What tools do you use for static application security testing and dynamic application security testing?
12. How do you integrate security checks into a CI/CD pipeline without blocking fast delivery?

Q: Tell me about a time you discovered a critical vulnerability. How did you manage disclosure and remediation?

*Situation:* During a routine code review at my previous company, I noticed an authentication bypass in an internal API that several downstream services depended on.

*Task:* I needed to assess the potential impact, contain the risk immediately, and coordinate a fix without disrupting live systems or alerting external parties prematurely.

*Action:* I documented the issue with a proof-of-concept, classified it as critical, and escalated to the security lead and the responsible engineering manager within the hour. I avoided sharing details in open channels to limit exposure. Working with the developer, I identified the root cause, a missing token validation check, and helped write and test the patch. I also scanned other APIs in the same codebase for the same pattern to rule out a systemic issue.

*Result:* The patch was deployed quickly after testing. We also added an automated check to the pipeline to catch the same class of issue in future pull requests, and no data was exposed during the window.

---

Q: How do you decide which vulnerabilities to fix first when you have limited resources?

*Situation:* At a previous role, a quarterly scan returned a large number of findings across multiple systems, far more than the team could address in a single sprint.

*Task:* I had to produce a ranked remediation plan that the engineering team could realistically work through, given constrained capacity.

*Action:* I scored each finding on three factors: exploitability (can it be triggered remotely or does it need local access?), asset criticality (is this a customer-facing system or an internal dev tool?), and data sensitivity (does a breach here expose payment records or personally identifiable information?). High-risk findings on customer-facing systems went into the immediate sprint. Internal, low-exploitability items were batched into future cycles. I shared a one-page risk summary with the engineering manager so the prioritisation was transparent and jointly agreed upon, not just imposed by the security team.

*Result:* The team cleared the highest-risk items in the first sprint and the process became a reusable template for future quarterly reviews. Engineers started flagging potential issues earlier because they understood how the scoring worked.

---

Q: A developer bypasses the mandatory security review to hit a deadline. What do you do?

*Situation:* A developer at my previous company pushed code directly to the main branch to meet a client deadline, skipping the security gate designed to catch injection risks.

*Task:* I had to address the immediate production risk and then close the process gap so it could not happen again.

*Action:* I reviewed the merged code the same day, found one low-severity issue, and raised it as a non-blocking fix for the next deploy. I then had a direct, non-accusatory conversation with the developer, walking through what the security gate was protecting against and why bypassing it created shared risk. I also worked with the DevOps team to add branch protection rules requiring an approval before any merge to main, making future bypasses structurally impossible rather than relying on policy alone.

*Result:* The branch protection was in place within a week. The developer later flagged a potential injection issue in their own code before raising a pull request, which was exactly the shift in mindset the team needed.

For vulnerability and risk questions: Think out loud using a risk-scoring approach. Cover exploitability (how easy is it to trigger?), asset value (what is at stake?), and business impact (what happens if this is exploited in a financial services context?). You do not need to cite a specific scoring system by name. Interviewers want to see your reasoning, not memorised formulas.

For compliance questions on PCI-DSS, SOX, or information security management standards: tie your answer to specific controls, data classification levels, and audit trail requirements. Mention how you would document evidence for auditors, since FIS operates in a heavily regulated environment where evidence quality matters as much as the control itself.

For incident response questions: Walk through the standard phases in order: detect, contain, investigate, remediate, and review. Emphasise communication at each stage. Fintech interviewers want to know you can keep stakeholders informed without over-sharing sensitive details in open channels.

For system or API design questions: Ask clarifying questions first (what data does this handle? who are the consumers? is it internet-facing?), then think aloud about the threat model. Cover authentication, authorisation, input validation, and logging as a baseline before adding scenario-specific controls.

For 'tell me about a time' questions: Use the STAR structure (Situation, Task, Action, Result) and make the Result concrete. If you cannot share exact figures due to confidentiality, describe the qualitative outcome clearly: 'the process was adopted team-wide' or 'no recurrence in the following quarter.'

FIS Global interviewers are looking for candidates who understand the threat landscape of financial services, not just generic security knowledge. Candidates consistently report being evaluated on a few key dimensions.

Domain-aware thinking. Can you connect a security control to a specific financial services risk? Answers that reference payment data integrity, third-party bank integrations, or regulatory audit requirements land better than purely generic ones.

Communication across teams. Security Engineers at FIS work with compliance, legal, product, and engineering simultaneously. Interviewers want to see that you can explain risk clearly to a non-technical audience and influence decisions without direct authority.

Hands-on credibility. Be ready to discuss specific tools you have used, such as SIEM platforms, vulnerability scanners, or DAST and SAST tools, and describe what you actually did with them. Vague answers like 'I have worked with various security tools' will not hold up under follow-up questions.

Ownership and follow-through. A common pattern in weaker answers is stopping at detection or escalation. Strong candidates describe tracking an issue through remediation, verifying the fix, and updating the process to prevent recurrence.

Calm under ambiguity. Scenario-based questions are often deliberately open-ended. Asking clarifying questions and structuring your approach before jumping to a solution signals maturity and mirrors how real security investigations actually work.

Company and domain context (start here)
Read about FIS Global's main product areas: core banking technology, payment processing, and capital markets platforms. This tells you what assets and data you would be protecting day to day. Review PCI-DSS requirements, especially those that apply to software development, change management, and third-party access. Brush up on SOX IT controls as well.

Technical refresh
Review how SIEM platforms work and practise describing a real threat you detected or would detect using log correlation. Revisit SAST and DAST tools you have used and be ready to explain how you interpret findings. Practise explaining CI/CD security integration out loud, covering where gates sit in the pipeline and how you would handle a failing security check without blocking a legitimate release.

Story preparation
Map your past experience to the question list in this guide. Write out STAR stories for at least five scenarios: a critical vulnerability you found, a compliance challenge you navigated, a time you changed a developer's behaviour, an incident you responded to, and a process you improved. Practise them aloud so the answers feel natural rather than recited.

Before each round
Prepare two or three questions for your interviewers. Ask about the team's current threat priorities, how security integrates with product delivery, and what a successful first few months looks like in the role. This signals genuine interest and gives you useful information to evaluate the opportunity.

1. Generic answers without a fintech lens.
Saying 'I would scan for vulnerabilities and patch them' without mentioning payment data risks, regulatory requirements, or third-party integrations will not stand out at FIS. Always tie your answer to the financial services context.

2. Listing tools without explaining decisions.
Naming every security tool you have touched is less compelling than explaining why you chose a particular tool for a specific problem. Interviewers want reasoning, not a resume recitation.

3. Skipping compliance context.
For a company like FIS, PCI-DSS and SOX are not background noise. If a question touches financial data, customer accounts, or system changes, weave in the relevant compliance angle naturally.

4. Underplaying communication skills.
Many candidates over-index on technical depth and forget to demonstrate that they can explain risk to a product manager or a senior business stakeholder. Show both sides of the skill.

5. Stopping at detection.
Weak answers end at 'I found the issue and reported it.' Strong answers continue: 'I tracked it through remediation, verified the fix, and updated the process to prevent recurrence.'

6. Jumping into answers without clarifying the scenario.
In scenario-based rounds, interviewers expect you to ask questions before proposing a solution: what type of system? what data does it hold? is it customer-facing? Skipping this step signals inexperience with real-world security work.