MTN Nigeria is part of the MTN Group, Africa\'s leading cellular telecommunications company. On May 16, 2001, MTN became the first GSM network to make a call following the globally lauded Nigerian GSM auction conducted by the Nigerian Communications Commission earlier in the year. Thereafter the company launched full commercial operations beginning with Lagos, Abuja and Port Harcourt. MTN paid $285m for one of four GSM licenses in Nigeria in January 2001. To date, in excess of US$1.8 billion has been invested building mobile telecommunications infrastructure in Nigeria. Since launch in August 2001, MTN has steadily deployed its services across Nigeria. It now provides services in 223 cities and towns, more than 10,000 villages and communities and a growing number of highways across the country, spanning the 36 states of the Nigeria and the Federal Capital Territory, Abuja. Many of these villages and communities are being connected to the world of telecommunications for the first time ever. The company\'s digital microwave transmission backbone, the 3,400 Kilometre Y\'elloBahn was commissioned by President Olusegun Obasanjo in January 2003 and is reputed to be the most extensive digital microwave transmission infrastructure in all of Africa. The Y\'elloBahn has significantly helped to enhance call quality on MTN network.
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).
Method of Application
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