Senior Software Engineer - SRE/DevOps

Our Purpose
Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.
Title and Summary
Senior Software Engineer - SRE/DevOps
Job Title: Senior Software Engineer - Site Reliability Engineering (SRE) / DevOps
Location: Dublin, Ireland
Department: Engineering
Reports To: Engineering Manager
About Mastercard
Mastercard is a global technology company in the payments industry. Our mission is to connect and power an inclusive, digital economy that benefits everyone, everywhere by making transactions safe, simple, smart, and accessible. Using secure data and networks, partnerships and passion, our innovations and solutions, we help individuals, financial institutions, governments, and businesses realize their greatest potential. With operations in over 210 countries and territories, we are building a sustainable world that unlocks priceless possibilities for all.
Role Overview
We are seeking a Senior Software Engineer with a strong background in Site Reliability Engineering (SRE) and DevOps to join our high-performing team. This role bridges infrastructure and development, focusing on system reliability, scalability, performance, and cost-efficiency. You will lead initiatives in observability, automation, incident management, and FinOps, while mentoring junior engineers and collaborating across product and engineering teams.
Key Responsibilities
Ensure production systems meet SLAs/SLOs through proactive performance and reliability enhancements.
Design and maintain observability systems (monitoring, logging, tracing, alerting).
Collaborate with engineering teams to improve operational health and accountability.
Lead FinOps initiatives to optimize cloud usage and support cost-aware engineering.
Tune and scale applications on Kubernetes for optimal performance.
Guide teams on reliability-first design and instrumentation for observability.
Drive incident management processes and postmortems for continuous improvement.
Build and maintain CI/CD pipelines and cloud infrastructure (AWS, EKS, EC2, PCF.).
Automate infrastructure provisioning and deployment workflows using IaC tools.
Troubleshoot complex systems and contribute to tool development and integration.
Advocate for best practices in automation, reliability, and financial accountability.
Required Qualifications
3-5 years in SRE, DevOps, or Production Engineering roles.
3+ years of experience in Java or ReactJS.
Deep expertise in AWS, Kubernetes, Linux.
Strong experience with monitoring and logging tools (Prometheus, Grafana, ELK, Loki).
Proficiency in tracing tools (OpenTelemetry, Jaeger, Tempo).
Experience with cloud cost tools (AWS Cost Explorer, Kubecost).
Strong scripting and coding skills (Python, Bash, Go, Groovy).
Hands-on experience with CI/CD tools (GitHub Actions, Jenkins).
Familiarity with IaC tools (Terraform, CloudFormation).
Excellent communication and collaboration skills.
Ownership mindset with a proactive approach to problem-solving.
Preferred Qualifications
Experience with Java (Spring Boot) and .NET/C#/python.
Familiarity with configuration management tools (Ansible, Chef, Puppet).
Experience with automated testing and security scanning pipelines.
Knowledge of network protocols and cloud architecture.
Experience designing zero-downtime deployment strategies (e.g., blue/green).
What We Offer
A collaborative and inclusive culture driven by Mastercard's Decency Quotient (DQ).
Opportunities to work on mission-critical infrastructure across global markets.
Continuous learning and development through guilds and special interest groups.
Competitive compensation and benefits aligned with your experience and impact.
Corporate Security Responsibility
All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:

• Abide by Mastercard's security policies and practices;
• Ensure the confidentiality and integrity of the information being accessed;
• Report any suspected information security violation or breach, and
• Complete all periodic mandatory security trainings in accordance with Mastercard's guidelines.