Senior MongoDB DBA — Cloud, SRE & Performance

ACI Worldwide; Limerick; On-site; EUR 75,000 - 115,000; Full time

Job summary

ACI Worldwide is seeking a Senior Database Administrator with strong MongoDB expertise to design, monitor, and optimize enterprise MongoDB environments. You will work with DevOps, security, and engineering teams to ensure high availability and reliability in a managed service context.

The role emphasizes MongoDB Atlas, performance engineering, automation, and cloud-native operations across AWS/Azure/GCP, plus mentoring for junior DBAs and driving observability improvements.

Qualifications

• Bachelor's degree in Computer Science, Engineering, Information Technology, or related field.
• 5+ years as a Database Administrator or similar role.
• 3+ years hands-on MongoDB administration, performance tuning, and scaling.
• Strong understanding of MongoDB internals, indexing, replication, sharding, backups, and HA.
• Experience with MongoDB Atlas or cloud-hosted MongoDB environments.
• Experience applying SRE practices to database operations and automation.
• Experience with AWS, Azure, or GCP.
• Strong troubleshooting, analytical, communication, and documentation skills.

Responsibilities

• Design, implement, monitor, and manage MongoDB environments including replica sets and backups.
• Support MongoDB Atlas and cloud-hosted MongoDB environments focusing on performance and availability.
• Analyze and optimize MongoDB performance across queries, indexing, memory, and I/O.
• Collaborate with DevOps, Engineering, and Security to ensure reliability and scalability.
• Apply SRE principles: SLIs/SLOs, incident response, RCA, and postmortems.
• Build observability dashboards and automate operational tasks.
• Mentor junior DBAs and contribute to standards and documentation.

Skills

MongoDB admin

MongoDB Atlas

Performance tuning

SRE practices

Automation

Observability

Python scripting

Bash scripting

Cloud platforms

Education

Bachelor's degree in Computer Science or related field

Tools

Terraform

CloudFormation

Datadog

ELK

Prometheus

Grafana

Job description

ACI Worldwide is seeking a Senior Database Administrator with strong MongoDB expertise to design, monitor, and optimize enterprise MongoDB environments. You will work with DevOps, security, and engineering teams to ensure high availability and reliability in a managed service context.

The role emphasizes MongoDB Atlas, performance engineering, automation, and cloud-native operations across AWS/Azure/GCP, plus mentoring for junior DBAs and driving observability improvements.