Engineer - Database Administrator, Information Technology at MTN Nigeria

Company:      MoMo Payment Service Bank (MoMoPSB)

Job Summary

The Database Administrator (DBA) ensures the availability, security, integrity, and optimal performance of MoMoPSB's database platforms that power high-volume, real-time payments. The DBA defines the database strategy, engineers resilient architectures, and executes day-to-day administration to meet business, regulatory, and cost objectives. 

Key Responsibilities 

• Own the multi‑year database roadmap: engine selection, cloud/on‑prem posture, managed services, and standards. 
• Design and govern HA/DR architectures meeting defined SLOs, RPO/RTO for Tier‑0 payment systems. 
• Embed security & compliance by design (PCI DSS, CBN PSB, NDPR, ISO 27001): encryption, segregation, least privilege, logging and retention. 
• Establish observability strategy (SLOs, error budgets, performance baselines, telemetry). 
• Plan capacity and cost: licensing optimization, storage tiering, reservations/commitments. 
• Plan/execute major upgrades and migrations with near‑zero downtime; institute schema versioning (Flyway/Liquibase) in CI/CD. 
• Implement robust backup & recovery strategies including immutable/WORM copies and quarterly restore drills. 
• Engineer performance: indexing, partitioning, query tuning, connection management, and workload management. 
• Harden security: RBAC, PAM/MFA, key management, secrets rotation, audit and access reviews. 
• Enable data integration: CDC/ETL to analytics, fraud systems, and regulatory reporting with data quality controls. 
• Maintain vendor relationships and optimize licenses/support contracts. 
• Provision, configure, and patch databases; manage users/roles; maintain schemas and jobs. 
• Monitor availability, replication lag, locks/deadlocks, storage growth; triage and resolve incidents. 
• Execute backups (full/incremental) and validate restores; maintain offsite/air‑gapped copies. 
• Support releases and change management; review SQL changes and advise on best practices. 
• Maintain runbooks, architecture diagrams, SOPs, and compliance evidence. 

Education

• Bachelor’s degree in computer science, Engineering, Information Systems or related field. 
• Relevant certifications are an advantage (e.g., Oracle OCP, Microsoft DP‑300/DP‑900, AWS/Azure database certifications, ITIL). 

Experience

• 3–7 years hands‑on DBA experience in high‑availability, high‑throughput environments (financial services/telco preferred). 
• Track record delivering HA/DR, performance tuning, security hardening, and major version upgrades/migrations. 
• Experience operating in cloud (AWS/Azure) using services such as RDS/Aurora or Azure SQL Managed Instance. 
• Expertise with at least two engines: PostgreSQL, Oracle, SQL Server, MySQL; familiarity with NoSQL (MongoDB/Cassandra) a plus. 
• Proficiency in SQL, PL/pgSQL, T‑SQL, PL/SQL; query optimization, indexing, partitioning. 
• Replication & HA (Always On/AG, Data Guard, Streaming/Logical replication). 
• Backup/Recovery (RMAN, pgBackRest, PITR, snapshot strategies). 
• Security (TLS, TDE, RBAC, tokenization/masking, auditing) and key management (KMS/Key Vault). 
• Observability (pg_stat_statements, AWR, Extended Events, Prometheus/Grafana, CloudWatch/Azure Monitor). 
• Automation with Terraform/Ansible; scripting in Bash/Python; schema migration tools (Liquibase/Flyway).