Lead 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.

We are looking for a DBA Lead to build and scale a world-class data platform supporting Oracle, PostgreSQL (including pgvector), Amazon Aurora/RDS, MongoDB, and DocumentDB. You will lead a hands-on team responsible for reliability, security, performance, and cost efficiency—enabling developers to provision, operate, and evolve databases through self-service, GitOps, and automation. Your work will establish the foundation that ensures data is secure-by-default, observable, and ready to power AI-enabled services across Unlimit.
Must Have: 5–7+ years of experience in database engineering or administration, including at least 2+ years leading DBA teams. Expert in PostgreSQL, including physical/logical replication, partitioning, performance tuning, connection pooling (PgBouncer / RDS Proxy), vacuum strategy, and pgvector for embeddings. Expert in Oracle, including backup/restore, AWR/ASH diagnostics, Data Guard or managed equivalents, upgrade and patch strategies, and encryption. Proven hands-on experience with AWS data services in production: Aurora (Postgres/MySQL), RDS (Postgres/Oracle), DocumentDB, and MongoDB. Experience with vector databases and embeddings: storage design, ANN indexes, latency tuning, and maintenance strategies. Proven HA/DR design and PITR implementation experience. Strong background in security and governance: encryption at rest/in transit, RLS (Postgres) / VPD (Oracle), IAM roles and least-privilege models, Vault/KMS secrets management, and auditing. Infrastructure as Code for databases (Terraform modules for RDS/Aurora/DocumentDB/Mongo, plus VM-based Postgres/Oracle) with GitOps integration (Argo CD). Observability expertise: Performance Insights, CloudWatch, AWR, pganalyze/PMM, and the ability to define actionable dashboards and alerts.

Nice to Have: Experience with multi-region or global topologies (Aurora Global, cross-region logical replication, Mongo/DocumentDB global clusters). Data migration and CDC tooling (AWS DMS, Debezium) and zero-downtime schema evolution. Workload isolation and routing strategies (read replicas, follower reads, connection pools, resource quotas). Cost and capacity optimization: instance and storage rightsizing, IOPS tuning, compression, and reserved instance planning. Experience integrating database observability signals into AIOps or ChatOps automations. 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. We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

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