Database Administrator

Recruiter:

Data Centrix

Job Ref:

JHB007027/LD

Date posted:

Thursday, December 11, 2025

Location:

Midrand, South Africa

SUMMARY:
Our financial sector client is seeking an experienced Oracle Database Administrator on a 12-month contract, working on a fully onsite basis in Pretoria. Must have experience in configuring and managing Oracle and PostgreSQL environments (version 16+), leveraging extensions like PostGIS or TimescaleDB

POSITION INFO:
Experience and Requirements

:
- Designing and maintaining advanced PostgreSQL data models with JSONB, indexed queries, and real-time updates (LISTEN/NOTIFY).
- Building triggers, audit logs, and stored procedures for complex integrations.
- Working with backend teams to expose APIs using Spring Boot or Node.js/Express.
- Meeting high-performance targets (<100ms latency, ±1,000 TPS) and applying strong security measures (RLS, TLS, OAuth/JWT).
- Configuring and managing PostgreSQL 16+ and cloud-managed services (AWS RDS/Azure PostgreSQL).
- Supporting full-text search, JSON-based responses, and disaster recovery planning.

Responsibilities

Design and maintain robust data models, including tables for users (auth tokens), integrations (flows/status), and logs (timestamps/errors), supporting JSONB for flexible API payloads.
Implement CRUD operations via indexed queries and enable real-time updates using LISTEN/NOTIFY.
Develop integration hooks such as triggers for audit logging and stored procedures for complex joins (e.g., integration patterns analysis).
Collaborate with backend teams to expose API endpoints (e.g., /api/integrations) using frameworks like Spring Boot or Node.js/Express.
Ensure performance targets (<100ms query latency) and support high throughput (1,000 TPS) with connection pooling.
Apply advanced security measures, including row-level security (RLS), TLS encryption, and OAuth/JWT validation at the application layer.
Implement scalability strategies such as horizontal sharding and read replicas for analytics.
Ensure compliance with GDPR and POPIA, including immutable audit logs and secure data handling.
Configure and manage PostgreSQL environments (version 16+), leveraging extensions like PostGIS or TimescaleDB where applicable.
Support managed services (AWS RDS or Azure Database for PostgreSQL) for automated backups and scaling.
Provide full-text search and JSON support for API responses.
Participate in disaster recovery and business continuity initiatives to ensure data availability and integrity.

Develop and implement integration processes and interfaces, including third-party
and perimeter/boundary integrations, focusing on secure API gateways, OAuth
2.0 authentication, and JWT token management, aligned with PMO standards

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