Preparing for an interview at Fis global requires a balanced approach. You must demonstrate deep technical competency while showing that you respect and understand the structured operational processes required in a highly regulated financial environment.

Role-related knowledge – You must show a deep understanding of Linux systems, scripting, cloud platforms (primarily AWS), and containerization. Interviewers want to see that you do not just use these tools, but that you understand their underlying mechanics and limitations.

Problem-solving ability – You will face ambiguous, scenario-based questions. The hiring team is looking for a structured, logical approach to troubleshooting and system architecture. Always explain your thought process, state your assumptions clearly, and discuss trade-offs.

Process & Compliance Alignment – Unlike startups where you can move fast and break things, Fis global values stability, security, and traceability. You need to demonstrate familiarity with ITIL frameworks, proper change management, and secure coding practices.

Collaborative Leadership – As a DevOps Engineer, you will constantly interface with software developers, product managers, and operations teams. You must show that you can communicate technical concepts clearly, influence without authority, and build strong cross-functional partnerships.

The interview process for a DevOps Engineer at Fis global is thorough, structured, and designed to evaluate both your deep technical capabilities and your operational mindset. While the exact timeline can vary by region—sometimes taking anywhere from a few weeks to a couple of months—the steps are clearly defined, and recruiters are highly supportive in guiding you through each stage.

The journey begins with an initial screening call with a recruiter to discuss your background and align on expectations. Following this, you will typically undergo a technical screening, which may include an online assessment or a basic technical quiz covering Linux, AWS, and Kubernetes. Once you pass the screening phase, you will enter the core interview rounds. These rounds dive deep into coding, system architecture, operational processes, and leadership capabilities.

The timeline above outlines the typical progression of the Fis global hiring loop. Candidates should use this roadmap to pace their preparation, ensuring they focus on fundamental technical skills early on before transitioning to system design, scenario-based problem-solving, and behavioral interview prep. Depending on the seniority of the role and the specific team, some technical rounds may be combined or expanded.

To succeed in the Fis global interview loop, you must perform consistently across several core evaluation areas. Each round is designed to test specific facets of your technical expertise and operational philosophy.

Linux Systems & Scripting

A significant portion of Fis global infrastructure relies on enterprise Linux distributions. You will be evaluated on your ability to interact with, manage, and automate these systems.

Be ready to go over:

• Shell Scripting – Writing robust Bash or Python scripts to automate routine administrative tasks, parse system logs, and manage files.
• System Performance Tuning – Identifying and resolving bottlenecks related to CPU, memory, disk I/O, and network latency.
• Database Basics – Writing and optimizing SQL queries, managing schema updates, and understanding database connectivity.

Advanced concepts (less common):

• Kernel parameter tuning for high-throughput network applications.
• Advanced system call tracing using tools like strace or lsof to debug hung processes.

Example scenarios:

• "You are given a database server that is running out of disk space due to runaway logs. Write a script to safely compress and archive logs older than 30 days without disrupting the active database service."
• "Explain how you would troubleshoot a scenario where a Java application on a Linux server is throwing OutOfMemory exceptions, but the system still reports free physical memory."

Cloud & Containerization

With the company's aggressive modernization roadmap, you must demonstrate comfort with cloud-native architectures and container orchestration.

Be ready to go over:

• Kubernetes Administration – Managing deployments, configuring ingress controllers, setting up resource limits, and troubleshooting failing pods.
• AWS Infrastructure – Designing secure VPCs, managing IAM roles, utilizing EC2/EKS, and configuring auto-scaling groups.
• Infrastructure as Code – Writing modular, reusable Terraform code to provision infrastructure safely and predictably.

Advanced concepts (less common):

• Setting up multi-cluster Kubernetes environments with service meshes like Istio.
• Implementing GitOps deployment patterns using tools like ArgoCD or Flux.

Example scenarios:

• "A Kubernetes deployment is failing with an ImagePullBackOff error. Walk me through your step-by-step process to diagnose and resolve the issue."
• "How would you design a secure, private network architecture in AWS for an application that needs to securely access an on-premises mainframe database?"

ITIL & Operational Processes

In the financial sector, maintaining a strict audit trail and minimizing operational risk is paramount. You will be evaluated on your familiarity with standard operational frameworks.

Be ready to go over:

• Incident Management – How you respond to production outages, communicate with stakeholders, and drive post-mortem root-cause analyses.
• Change Management – Participating in Change Advisory Boards (CAB), writing clear change implementation plans, and designing foolproof rollback strategies.
• Pull Request Workflows – Using branch protection rules, automated linting, and security scanning to ensure high-quality code enters production.

Example scenarios:

• "Describe how you would structure a change request for a major database schema update that requires five minutes of planned maintenance window downtime."
• "What steps do you take during a high-severity production outage to ensure that technical troubleshooting does not interfere with executive stakeholder communication?"

As a DevOps Engineer at Fis global, your daily work will directly influence the stability and agility of the company's financial services platforms. You will collaborate closely with software development engineering teams, product managers, and security operations to deliver high-quality software continuously.

Your primary focus will be on automating the software delivery lifecycle. This involves designing, building, and maintaining robust CI/CD pipelines that compile, test, and deploy code seamlessly across development, staging, and production environments. You will actively work on eliminating manual intervention in the deployment process, reducing the time-to-market for critical financial features while maintaining strict compliance standards.

Additionally, you will share ownership of system uptime and performance. You will implement comprehensive monitoring, logging, and alerting systems using tools like Prometheus, Grafana, and Splunk to catch anomalies before they impact end-users. When production incidents do occur, you will participate in on-call rotations, leverage your deep systems knowledge to restore services quickly, and lead structured post-mortem discussions to prevent future occurrences.