DBA Sênior | Oracle, PostgreSQL e MongoDB
Posted November 9, 2026
Job Description
- This position is listed on behalf of a partner company, which manages all applications and next steps. Our partner is looking for a Senior DBA | Oracle, PostgreSQL & MongoDB based in Brazil. We are looking for a Senior Database Administrator to take on a strategic role in managing and evolving critical database environments. You will be responsible for Oracle, PostgreSQL, and MongoDB infrastructure, driving modernization, performance optimization, and risk reduction initiatives. Working closely with Engineering, Development, Infrastructure, and Architecture teams, you will help ensure the reliability, security, and scalability of systems supporting mission-critical financial market operations. This is an opportunity to become a technical reference for database administration, lead structural improvements, and establish best practices across multiple teams. The role offers a fully remote working environment and significant ownership over the evolution of the data infrastructure.
- Accountabilities Administer, operate, and optimize Oracle, PostgreSQL, and MongoDB database environments. Lead the continuous restructuring and modernization of the data infrastructure, identifying risks, performance bottlenecks, and technical debt. Design, implement, and improve backup, recovery, high availability, and disaster recovery strategies. Perform performance tuning across queries, indexes, execution plans, and capacity planning in critical environments. Collaborate with Development and Architecture teams on data modeling, query reviews, and technical standards. Establish and maintain database security policies, access controls, and compliance practices. Monitor database environments proactively, defining metrics, alerts, and preventive measures to reduce incidents. Lead database migrations, version upgrades, and infrastructure consolidation initiatives. Document processes, architectures, and operational runbooks to promote consistency and knowledge sharing. Serve as the database technical reference, supporting architectural decisions across different engineering squads. Requirements: Solid professional experience as a DBA in highly critical production environments. Advanced knowledge of Oracle Database administration, performance tuning, backup and recovery, and high availability. Advanced knowledge of PostgreSQL administration, performance tuning, replication, and backup and recovery. Hands-on experience with MongoDB administration, data modeling, replica sets, sharding, and performance optimization. Experience working with high-availability environments and high-volume transactional workloads. Advanced SQL skills and knowledge of database performance tuning and disaster recovery. Familiarity with data modeling, database monitoring and observability, Linux operating systems, and database security and access control. Experience with scripting and automation using Shell, Bash, or similar tools. Intermediate English proficiency. A degree, technical degree, or relevant technical education. Ability to work independently and proactively, take a consultative approach, and recommend structural improvements. Strong communication and collaboration skills when working with Development, Infrastructure, and Product teams. Nice to have: Experience in the financial sector, particularly with banks, brokerages, asset managers, fintechs, or capital markets companies. Knowledge of Redis. Experience automating DBA tasks with scripts, Terraform, Ansible, or other Infrastructure as Code tools. Familiarity with database observability solutions such as Prometheus, Grafana, or APM tools. Experience with managed cloud databases on AWS, Azure, or GCP. Familiarity with OMS, Market Data, or B3 integrations. Benefits: 100% remote work. Full-time engagement under a PJ (Brazilian contractor) arrangement. Opportunity to take technical ownership of critical database environments and lead modernization initiatives. Inclusive workplace, with applications open to people with disabilities (PwD). Compensation details were not disclosed.
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