Senior Database Administrator

About Unlimit

Unlimit is the global fintech powerhouse behind the world’s largest proprietary payments infrastructure.
Founded in 2009, Unlimit operates across 17 global offices with 700+ experts, seamlessly integrating 1,000+ payment methods into a single platform. From London to São Paulo, we empower businesses to scale across borders with a unified suite of financial tools — including payment processing, alternative payment methods, multicurrency business accounts, card issuing, banking-as-a-service, and crypto on- and off-ramps.
Our mission is to break down financial barriers and enable seamless money movement across borders. We give forward-thinking businesses the tools to accept, send, and manage payments effortlessly, wherever they operate.

The Role
We are looking for a Senior Database Administrator to support and evolve our production database landscape across PostgreSQL, Oracle, and AWS-managed database services.

This is a hands-on technical role focused on reliability, performance, availability, security, and automation of mission-critical databases. You will work closely with engineering, SRE, and security teams to ensure our database systems are stable, scalable, and secure by default.

Responsibilities
- Administer and support production environments across PostgreSQL, Oracle, Aurora/RDS, MongoDB, and DocumentDB.
- Ensure high availability and disaster recovery readiness (replication, backups, PITR, failover testing).
- Perform performance tuning, query optimization, and capacity planning.
- Implement and maintain backup/restore procedures and upgrade strategies.
- Monitor database health and define meaningful alerts and dashboards.
- Improve operational processes through automation and Infrastructure as Code.
- Support secure access models and enforce governance standards.
- Participate in incident response and root cause analysis related to database systems.
- Contribute to database standards, documentation, and operational runbooks.
- Support developers with schema design, indexing strategies, and performance troubleshooting.

Must Have
- 5+ years of hands-on experience in database administration or database engineering.
- Strong expertise in PostgreSQL:
replication (physical/logical),
partitioning,
performance tuning,
PgBouncer / RDS Proxy,
vacuum strategy,
pgvector.
- Strong experience with Oracle:
backup/restore,
AWR/ASH diagnostics,
Data Guard,
patching and upgrade strategies.
- Production experience with AWS data services:
Aurora (Postgres/MySQL),
RDS (Postgres/Oracle),
DocumentDB,
MongoDB.
HA/DR design and PITR implementation experience.
- Solid understanding of database security:
encryption at rest/in transit,
RLS (Postgres) / VPD (Oracle),
IAM and least-privilege models,
secrets management (KMS / Vault).
- Experience with Infrastructure as Code (Terraform) for database provisioning.
- Experience with monitoring and observability tools (CloudWatch, Performance Insights, AWR, pganalyze/PMM or similar).

Nice to Have
- Multi-region or global database topologies.
- CDC and migration tooling (AWS DMS, Debezium).
- Experience with vector databases and embeddings.
- Cost and capacity optimization experience.
- Experience working in high-load fintech or payment environments.

Join Unlimit Team now!

Unlimit is an equal opportunity employer. We believe passionately that employing a diverse workforce is central to our success. We make recruiting decisions based on your experience and skills. We welcome applications from all members of society irrespective of age, sex, disability, sexual orientation, race, religion or belief.

Join Unlimit Team now!

Unlimit is an equal opportunity employer. We believe passionately that employing a diverse workforce is central to our success. We make recruiting decisions based on your experience and skills. We welcome applications from all members of society irrespective of age, sex, disability, sexual orientation, race, religion or belief.