Site Reliability Engineer (SRE)
Bratislava, Slovakia
Fiserv
Fiserv is a global fintech and payments company with solutions for banking, global commerce, merchant acquiring, billing and payments, and point-of-sale.Calling all innovators – find your future at Fiserv.
We’re Fiserv, a global leader in Fintech and payments, and we move money and information in a way that moves the world. We connect financial institutions, corporations, merchants, and consumers to one another millions of times a day – quickly, reliably, and securely. Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, we’re involved. If you want to make an impact on a global scale, come make a difference at Fiserv.
Job Title
Site Reliability Engineer (SRE)Position Summary
We are seeking a highly skilled Site Reliability Engineer (SRE) with deep expertise in Kubernetes and cloud technologies (AWS, Azure, or GCP). The SRE will be responsible for designing, deploying, automating, and supporting highly available, scalable, and secure containerized applications in cloud-native environments. You will work closely with development, operations, and security teams to ensure the reliability, performance, and efficiency of our production systems.
Key Responsibilities
- Design, deploy, and manage Kubernetes clusters (on-premises and/or cloud-managed such as EKS, AKS, GKE) to support scalable microservices architectures.
- Automate infrastructure provisioning and application deployment using Infrastructure as Code (IaC) tools such as Terraform, Helm, or CloudFormation.
- Monitor, troubleshoot, and optimize system performance using observability tools (Prometheus, Grafana, ELK, Datadog, etc.).
- Implement and manage CI/CD pipelines to ensure rapid, repeatable, and reliable software delivery.
- Ensure system reliability, availability, and security through proactive monitoring, incident response, and root cause analysis.
- Develop and maintain runbooks, dashboards, and documentation for operational procedures and system architectures.
- Participate in on-call rotations and respond to production incidents, ensuring minimal downtime and fast recovery.
- Collaborate with development and operations teams to drive DevOps and SRE best practices, including capacity planning, scaling, and cost optimization.
- Continuously improve automation, tooling, and processes to reduce manual work and increase system reliability.
Required Skills & Experience
- 3+ years experience as an SRE, DevOps Engineer, or similar role supporting large-scale, production-grade environments.
- Expertise in Kubernetes (deployment, scaling, upgrades, troubleshooting, networking, RBAC, etc.).
- Hands-on experience with at least one major cloud provider: AWS, Azure, or GCP.
- Proficiency in scripting/programming (Python, Bash, Go, etc.).
- Experience with IaC tools (Terraform, Helm, CloudFormation, ARM, etc.).
- Strong knowledge of Linux systems administration and networking concepts.
- Familiarity with monitoring, logging, and alerting tools (Prometheus, Grafana, ELK/EFK, Datadog, etc.).
- Experience with CI/CD tools (Jenkins, GitLab CI, ArgoCD, etc.).
- Understanding of security best practices in cloud and containerized environments.
- Excellent troubleshooting and problem-solving skills.
- Strong communication and collaboration skills.
Preferred Qualifications
- Certified Kubernetes Administrator (CKA) or similar certification.
- Experience with service mesh (Istio, Linkerd), ingress controllers, and API gateways.
- Experience in a multi-cloud or hybrid cloud environment.
- Familiarity with GitOps practices and tools (ArgoCD, Flux).
- Experience with disaster recovery, backup, and business continuity planning.
Education
- Bachelor’s degree in Computer Science, Engineering, or related field (or equivalent experience).
This role is ideal for engineers who are passionate about automation, reliability, and modern cloud-native architectures, and who thrive in fast-paced, collaborative environments.
Thank you for considering employment with Fiserv. Please:
- Apply using your legal name
- Complete the step-by-step profile and attach your resume (either is acceptable, both are preferable).
Our commitment to Diversity and Inclusion:
Fiserv is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, gender, gender identity, sexual orientation, age, disability, protected veteran status, or any other category protected by law.
Note to agencies:
Fiserv does not accept resume submissions from agencies outside of existing agreements. Please do not send resumes to Fiserv associates. Fiserv is not responsible for any fees associated with unsolicited resume submissions.
Warning about fake job posts:
Please be aware of fraudulent job postings that are not affiliated with Fiserv. Fraudulent job postings may be used by cyber criminals to target your personally identifiable information and/or to steal money or financial information. Any communications from a Fiserv representative will come from a legitimate Fiserv email address.
* Salary range is an estimate based on our InfoSec / Cybersecurity Salary Index 💰
Tags: APIs Automation AWS Azure Bash CI/CD Cloud Computer Science DevOps ELK FinTech GCP GitLab Grafana Helm Incident response Jenkins Kubernetes Linux Microservices Monitoring Prometheus Python Scripting Terraform
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