Site Reliability Engineer

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Job Type: Permanent

Job Location: Dublin (Hybrid – 3 days at customer site per week)

Careers at TCS: It means more

TCS is a purpose-led transformation company, built on belief. We do not just help businesses to transform through technology. We support them in making a meaningful difference to the people and communities they serve - our clients include some of the biggest brands in the UK and worldwide. For you, it means more to make an impact that matters, through challenging projects which demand ambitious innovation and thought leadership.

• Collaborate with leading lights of industry
• Gain access to endless learning opportunities
• Shape the future of TCS

As a Site Reliability Engineer supporting MQ, NATS/Event Broker, you will be responsible for the stability and resilience of Mastercard’s messaging backbone.

You will partner closely with application teams, platform engineering, infrastructure and security teams to reduce operational risk, improve system reliability, and ensure issues are detected and resolved before customer impact. This is a Production-focused engineering role rather than an application development role.

• Ensure high availability, performance, and resilience of MQ, NATS/Event Broker platforms across environments.
• Participate in on-call rotations and provide hands-on support during production incidents
• Lead or contribute to incident triage, mitigation, and service restoration.
• Perform root cause analysis (RCA) and drive corrective and preventive actions to closure.
• Design, implement and maintain monitoring, alerting, and dashboards to enable proactive detection.
• Support and govern production changes including upgrades, patching, certificate renewals and configuration changes.
• Assess operational readiness for changes and ensure rollback and validation plans are in place.
• Automate operational tasks and workflows to reduce manual effort and improve recovery times.
• Partner with application teams to support onboarding, scaling and operational best practices.

Required skills and experience

• Experience supporting mission-critical production systems with on-call responsibility.
• Strong understanding of distributed systems and messaging platforms.
• Hands-on experience with MQ, NATS/Event Broker, or similar middleware technologies.
• Experience with monitoring, logging, and alerting tools.
• Proficiency in at least one scripting or programming language (e.g., Python, Bash, Java).
• Solid knowledge of Linux, networking fundamentals, and system troubleshooting.
• Ability to troubleshoot complex, multi-component issues under pressure.
• Experience operating enterprise-scale messaging or event-driven platforms.
• Familiarity with clustering, replication, persistence, and high-availability patterns.
• Experience working in regulated environments with strong change management practices.
• Exposure to automation, reliability engineering, or SRE best practices.

TCS is consistently voted a Top Employer in the UK and globally. Our competitive salary packages feature pension, health care, life assurance, laptop and access to extensive training resources and discounts within the larger Tata network.

We offer health & wellness initiatives and sports events; we are the proud sponsor of the London Marathon and partner with our local communities in Ireland.

Tata Consultancy Services UK&I is committed to meeting the accessibility needs of all individuals in accordance with the Ireland Employment Equality Acts 1998-2011 (as amended) and the Equal Status Acts 2 as amended).

We welcome and embrace diversity in race, nationality, ethnicity, disability, neurodiversity, gender identity, age, physical ability, gender reassignment, sexual orientation. We are a disability inclusive employer and encourage disabled people to apply for this role.

As a Disability Confident Employer, we offer an interview to applicants with disabilities or long-term conditions who meet the minimum criteria for the role. Please email us at if you would like to opt in.

If you are an applicant who needs any adjustments to the application process or interview, please contact us at with the subject line: “Adjustment Request” or email to request an adjustment. We welcome requests prior to you completing the application and at any stage of the recruitment process.

This is to notify you that TCS does not ask for any sort of payment or security deposit from candidates at any stage of the recruitment process. The firm never sends out job offers from free internet email services like Gmail, Yahoo Mail, and so on. TCS has not authorised any third-party company to collect money on their behalf. As a vigilant job seeker, beware of fraudulent recruitment activity and protect your interests! You can write to to report any fraudulent activity.

Due to the high volume of applications, we will be unable to contact each applicant individually on the status of their application. If you have not received a direct response within 30 days, then it should be deemed unsuccessful on this occasion. xcfaprz

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