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Mastercard

Site Reliability Engineer I

O Fallon, MO, United States

Pay Ranges O'Fallon, Missouri: $61,000 - $102,000 USD

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Job details

Pay: Pay Ranges O'Fallon, Missouri: $61,000 - $102,000 USD
Posting language: English
Posted: Nov 5, 2026

Original job description

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

Site Reliability Engineer I

Overview

The Service Operations Technology (SOT) BizOps team is seeking a Site Reliability Engineer (SRE) to support and enhance enterprise infrastructure, asset management, automation, and operational platforms. This role focuses on reliability, observability, automation, release management, and operational excellence across business-critical services. Are you passionate about understanding complex systems, automating repetitive work, and improving platform reliability? Do you thrive at the intersection of software engineering and operations? Business Operations plays a critical role in Mastercard's DevOps and SRE transformation by partnering with engineering teams to improve operational readiness, automate processes, and ensure platforms meet the highest standards of availability, performance, security, and scalability. Successful candidates are curious, collaborative, and committed to continuous improvement while balancing production support with strategic engineering initiatives.

Role Business Operations serves as the operational excellence and production readiness steward for the platforms we support. We partner closely with software engineering teams to design, implement, operate, and continuously improve technology services. As a Site Reliability Engineer, you will ensure operational requirements including availability, resiliency, performance, observability, security, capacity management, and deployment automation are incorporated throughout the software lifecycle. This role bridges engineering and operations by supporting production services, managing operational risk, driving automation, participating in releases, and improving platform reliability through proactive engineering and continuous improvement.

Position Qualifications

Experience administering enterprise platforms in production environments, including upgrades, patching, troubleshooting, performance tuning, and operational support.
Experience with CMDB, discovery, asset management, inventory management, or related enterprise technologies.
Strong Linux/Unix administration skills; working knowledge of Windows administration and authentication technologies including Active Directory, LDAP, SSH, and service accounts.
Experience supporting software releases, production changes, and operational readiness activities.
Strong scripting and automation skills using Python, PowerShell, Bash, or similar technologies.
Experience with APIs, integrations, workflow automation, and orchestration technologies.
Understanding of monitoring, observability, alerting, and operational health management.
Experience troubleshooting distributed systems across infrastructure, application, network, and integration layers.
Strong analytical, problem-solving, and root cause analysis skills.
Ability to manage operational responsibilities while driving strategic automation and platform improvements.
Strong communication and stakeholder management skills.
Ability to effectively manage and resolve high-severity production incidents.

Responsibilities

Support the full service lifecycle from design and implementation through deployment, operation, and optimization.
Serve as an operational owner for critical enterprise platforms, ensuring reliability, availability, performance, and scalability.
Support production readiness reviews, launch assessments, capacity planning, and operational validation.
Monitor, maintain, and troubleshoot services in production environments.
Lead incident response, root cause analysis, and implementation of long-term corrective actions.
Drive automation initiatives that reduce operational toil and improve platform stability.
Support releases and deployments while ensuring production readiness and operational excellence.
Perform operating system maintenance, patching, vulnerability remediation, and lifecycle management.
Analyze operational data and ITSM activities to identify resiliency improvements and operational risks.
Collaborate with globally distributed teams across multiple regions and time zones.
Maintain operational documentation and contribute to knowledge sharing and mentoring efforts.

Platform Engineering & Automation

Engineers supporting platform engineering and automation may also:

Design and maintain deployment automation and infrastructure management solutions.
Support CI/CD pipelines and modern DevOps practices.
Develop tools, integrations, and automation that improve reliability, efficiency, and scalability.
Enhance platform visibility, operational effectiveness, and customer experience.
Evaluate emerging technologies and identify modernization opportunities.
Partner with engineering teams to improve deployment reliability and reduce operational risk.

Additional Qualifications

Bachelor's degree in Computer Science, Engineering, Mathematics, or a related field, or equivalent experience.
Experience with software engineering principles, automation, scripting, pipeline management, and system design.
Strong sense of ownership, urgency, and systematic problem-solving.
Experience debugging, optimizing, and automating complex technical environments.
Ability to manage competing priorities and work effectively with multiple stakeholders.
Experience in one or more programming languages such as Python, Java, Go, C++, Ruby, or similar.
Knowledge of Site Reliability Engineering principles, DevOps practices, observability, automation-first operations, and continuous improvement.
Experience working across development, operations, product, and infrastructure teams.
Familiarity with source control systems, CI/CD platforms, artifact repositories, and infrastructure automation technologies.
Demonstrated passion for innovation, automation, operational excellence, and continuous learning.

Mastercard is a merit-based, inclusive, equal opportunity employer that considers applicants without regard to gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law. We hire the most qualified candidate for the role. In the US or Canada, if you require accommodations or assistance to complete the online application process or during the recruitment process, please contact reasonable_accommodation@mastercard.com and identify the type of accommodation or assistance you are requesting. Do not include any medical or health information in this email. The Reasonable Accommodations team will respond to your email promptly.

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.

In line with Mastercard’s total compensation philosophy and assuming that the job will be performed in the US, the successful candidate will be offered a competitive base salary and may be eligible for an annual bonus or commissions depending on the role. The base salary offered may vary depending on multiple factors, including but not limited to location, job-related knowledge, skills, and experience. Mastercard benefits for full time (and certain part time) employees generally include: insurance (including medical, prescription drug, dental, vision, disability, 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, pro-rated based on date of hire; 10 annual paid U.S. observed holidays; 401k with a best-in-class company match; deferred compensation for eligible roles; fitness reimbursement or on-site fitness facilities; eligibility for tuition reimbursement; and many more. Mastercard benefits for interns generally include: 56 hours of Paid Sick and Safe Time; jury duty leave; and on-site fitness facilities in some locations.

THIS POSTING RELECTS ONE OR MORE CURRENT VACANCIES ON OUR TEAM, AND MASTERCARD INTENDS TO FILL THIS POSITION BY 02/03/2027. If the fill date has passed, Mastercard intends to fill this position as soon as possible.

Pay Ranges O'Fallon, Missouri: $61,000 - $102,000 USD

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