Senior MongoDB DBA — Performance, Atlas & SRE Lead

ACI Worldwide; Limerick; On-site; EUR 14,000 - 19,000; Full time

Job summary

ACI Worldwide is seeking a highly skilled Senior Database Administrator with strong MongoDB expertise to join our payments platform team. You will manage MongoDB environments, ensure high availability, and drive performance and automation in a cloud-native setting.

Collaborate with DevOps, engineering, and security to scale the Kinetic platform, apply SRE practices, build observability, and mentor junior DBAs while delivering reliable, cost‑effective database operations across AWS, Azure, or GCP.

Qualifications

• Bachelor’s degree in Computer Science, Engineering, Information Technology, or related field.
• 5+ years of experience as a Database Administrator, Database Engineer, or similar role.
• At least 3 years of hands-on experience with MongoDB administration, performance tuning, and scaling.
• Experience working with MongoDB Atlas or cloud-hosted MongoDB environments.
• Experience applying SRE practices to database operations, including monitoring and automation.
• Experience working with AWS, Azure, or GCP.

Responsibilities

• Design, implement, monitor, and manage MongoDB environments, including replica sets, sharding, backups, performance, and availability.
• Support MongoDB Atlas and cloud-hosted MongoDB environments with a strong focus on performance, availability, monitoring, and automation.
• Analyze and optimize MongoDB performance across query execution, indexing, memory usage, I/O, schema design, and data modeling.
• Partner with engineering teams to improve application‑database interaction patterns and ensure scalable, high‑performing database solutions.
• Apply SRE principles to database operations, including SLIs, SLOs, error budgets, incident response, root cause analysis, and postmortems.
• Build and improve observability dashboards, monitoring, alerting, and operational insights using tools such as Prometheus, Grafana, Datadog, ELK, or similar platforms.
• Automate database operational tasks such as monitoring, patching, provisioning, configuration management, and recurring maintenance activities.
• Support secure, compliant, reliable, and cost‑effective cloud database operations across AWS, Azure, GCP, or MongoDB Atlas environments.
• Collaborate with DevOps, Engineering, Database, and Security teams to ensure reliability, scalability, security, and operational excellence.
• Mentor junior DBAs and contribute to knowledge sharing, standards, documentation, and continuous improvement in database reliability and performance.

Skills

MongoDB administration

Performance tuning

Automation

Cloud-native operations

SRE practices

Observability tools

Python scripting

Troubleshooting

Documentation

Education

Bachelor’s degree in Computer Science, Engineering, IT, or related field

Tools

Terraform

CloudFormation

Datadog

ELK

Prometheus

Job description

ACI Worldwide is seeking a highly skilled Senior Database Administrator with strong MongoDB expertise to join our payments platform team. You will manage MongoDB environments, ensure high availability, and drive performance and automation in a cloud-native setting.

Collaborate with DevOps, engineering, and security to scale the Kinetic platform, apply SRE practices, build observability, and mentor junior DBAs while delivering reliable, cost‑effective database operations across AWS, Azure, or GCP.