Site Reliability Engineer I

Mastercard•O'fallon, MO

3d•$61,000 - $102,000

About The Position

The Service Operations Technology (SOT) BizOps team is seeking a Site Reliability Engineer I to support and continuously improve enterprise infrastructure, configuration management, discovery, asset and inventory, automation, and operational technology platforms. The role develops expertise at the intersection of software engineering and production operations, with exposure to reliability, observability, automation, operational readiness, incident management, and continuous improvement. The successful candidate will support production services while developing engineering skills to reduce operational toil, improve service visibility, automate repetitive activities, and improve platform reliability. Business Operations supports operational excellence and production readiness for supported platforms, partnering with software engineering and technology teams throughout the service lifecycle to maintain reliable, observable, secure, scalable, and operationally supportable services. The Site Reliability Engineer I will gain practical experience operating enterprise technology platforms while applying SRE and DevOps principles to production support. The role includes platform maintenance, monitoring, troubleshooting, deployment support, and operational validation, as well as contributions to automation and engineering improvements. With guidance from experienced engineers, the employee may contribute to increasingly complex automation, observability, reliability, and platform-engineering activities. The SRE framework classifies the role's core discipline skills at the Foundational level. The position works with software engineering, infrastructure, product, cybersecurity, and operations teams and supports business-critical enterprise services. It also requires following Mastercard security policies and practices, protecting information confidentiality and integrity, reporting suspected security violations or breaches, and completing mandatory security training. Mastercard describes its employment practices as merit-based, inclusive, and equal opportunity. The position is based in O'Fallon, Missouri, with a stated pay range of $61,000–$102,000 USD. The posting says Mastercard intends to fill the position by 02/03/2027, or as soon as possible if that date has passed.

Requirements

Bachelor's degree in Computer Science, Engineering, Mathematics, Information Technology, or a related discipline, or equivalent practical experience.
Foundational knowledge of Linux/Unix systems and system-administration concepts.
Foundational programming or scripting experience using Python, PowerShell, Bash, Java, Go, or similar technologies.
Understanding of networking fundamentals, including TCP/IP, DNS, HTTP/HTTPS, SSH, and basic network troubleshooting.
Understanding of software engineering and automation concepts.
Familiarity with monitoring, logging, alerting, and observability concepts.
Systematic problem-solving and troubleshooting abilities.
Understanding of production support, incident response, and change-management practices.
Ability to document technical procedures, issues, and resolutions effectively.
Strong written and verbal communication skills.
Ability to collaborate effectively across technical and business teams.
Strong sense of ownership, curiosity, and interest in automation and continuous learning.

Nice To Haves

Experience supporting enterprise applications or infrastructure in production environments.
Experience with Python, PowerShell, Bash, or similar programming, scripting, and automation technologies.
Experience developing or supporting REST APIs, system integrations, and automated operational workflows.
Experience with Splunk, Dynatrace, or comparable enterprise monitoring and observability technologies.
Familiarity with source-control and repository technologies such as Bitbucket and Git, including branch and pull-request workflows.
Familiarity with CI/CD, release, and deployment technologies such as Jenkins and XLR.
Familiarity with configuration management and infrastructure automation technologies such as Chef and Ansible.
Exposure to workflow or orchestration technologies such as Apache NiFi or comparable platforms.
Familiarity with AWS, Azure, or enterprise cloud environments.
Experience with CMDB, discovery, asset management, inventory management, or configuration-management technologies.
Familiarity with BMC Discovery or comparable infrastructure-discovery technologies.
Experience with Remedy or comparable ITSM technologies.
Understanding of SSL/TLS and certificate management.
Familiarity with Agile, DevOps, SRE, and modern software-delivery practices.
Relevant Linux, cloud, security, automation, DevOps, or SRE certifications.

Responsibilities

Support day-to-day operation and maintenance of enterprise technology platforms and supporting infrastructure.
Perform routine system and application maintenance using established procedures and engineering standards.
Support monitoring of service health, availability, performance, capacity, and operational events.
Troubleshoot and resolve basic-to-moderate issues across application, infrastructure, network, operating-system, and integration layers.
Escalate complex technical issues and assist experienced engineers with investigation and resolution.
Support production incidents and participate in root cause analysis and corrective-action activities.
Perform routine Linux/Unix system administration and support related enterprise infrastructure.
Participate in operating system and application upgrades, patching, vulnerability remediation, releases, deployments, and production changes.
Support production-readiness reviews and operational-validation activities for new or changed services.
Identify automation opportunities and contribute, with guidance, to scripts and tools that reduce repetitive operational activities and toil.
Contribute to monitoring, alerting, health-check automation, dashboards, and observability improvements using enterprise technologies such as Splunk and Dynatrace.
Work with REST APIs and system integrations in support of automated operational workflows.
Develop practical experience with source control, CI/CD, release pipelines, deployment automation, and configuration-management technologies.
Assist with capacity, performance, reliability, and system-health analysis.
Follow incident, problem, change, configuration-management, security, and operational risk-management practices.
Maintain technical documentation, operating procedures, troubleshooting guides, and knowledge articles.
Participate in technical reviews and quality checks that support service stability and operational readiness.
Collaborate with product, software engineering, infrastructure, cybersecurity, and operations teams.
Participate in knowledge-sharing activities and continuously develop technical expertise in SRE, automation, observability, cloud, and platform engineering.
Abide by Mastercard security policies and practices, ensure confidentiality and integrity of accessed information, report suspected security violations or breaches, and complete periodic mandatory security training.

Benefits

Insurance coverage, including medical, prescription drug, dental, vision, disability, and life insurance.
Flexible spending account and health savings account.
Paid leaves, including 16 weeks of new parent leave and up to 20 days of bereavement leave.
80 hours of Paid Sick and Safe Time.
25 days of vacation time and 5 personal days, prorated based on date of hire.
10 annual paid U.S. observed holidays.
401(k) with a company match.
Deferred compensation for eligible roles.
Fitness reimbursement or on-site fitness facilities.
Eligibility for tuition reimbursement.
May be eligible for an annual bonus or commissions, depending on the role.