05/26/2026 updated

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100 % available

Senior Database Engineer / Database Administrator / DBRE

Blumenau, Brazil
Only remote
Blumenau, Brazil
Only remote

Profile attachments

VanderleySantAnna.pdf

About me

Senior DBA/DBRE and Database Engineer | PostgreSQL, MySQL, Oracle & SQL Server | Database Reliability, Performance & Automation Engineer | Python & Cloud.

Sql Data WarehouseBash ShellData ArchitectureData MigrationData WarehousingIBM DB2Database AnalysisDatabase DevelopmentDatabase EncryptionDatabase TuningOracle Data GuardLinuxPython (Programming Language)PostgreSQLLinux AdministrationMariaDBMongoDBMySQLOracle DatabasesOracle RacWindows PowerShellRed Hat Enterprise LinuxRedisSQL DatabasesInformixSql Server Database AdministrationMysql DatabasesDatabase PerformancePerformance MonitorOracle Certified Professional (OCP)SQL Server Management Studio (SSMS)Database BackupDatabase InstallationSql Database AdministrationSql TuningSql Server Data ToolsDatabase Administration
Senior Database Administrator (DBA) / Database Reliability Engineer (DBRE) / Database Engineer with 30+ years of experience across enterprise infrastructure, cloud environments, automation, and mission-critical database platforms.

B.Sc. in Software Engineering with deep expertise in PostgreSQL, Oracle, MySQL/MariaDB, SQL Server, MongoDB, and Redis administration, with strong focus on HA/DR strategies, observability, incident management, performance tuning, automation, and database reliability across financial and enterprise environments.

Experienced managing large-scale production infrastructures with 99.99% uptime requirements, 30+ production databases, multi-terabyte environments exceeding 100 TB, and transactional workloads above 7 trillion transactions annually.

Hands-on experience with Prometheus, Grafana, Python, Bash, PowerShell, Terraform, AWS, Linux administration, and Infrastructure as Code (IaC), including SLI/SLO-driven monitoring, automation, and operational reliability practices.

Oracle Certified Professional (OCP) with strong background in RAC, Data Guard, Exadata, backup/recovery, database security, and production support. Recognized for technical leadership, troubleshooting expertise, and driving operational excellence in high-availability enterprise systems.

What Sets Me Apart
Multi-DB and multi-cloud perspective; strong focus on risk, cost, and recovery time.
Executive-level documentation + operational runbooks; handover and training included.
Fluent in Portuguese; advanced technical English and Spanish and experience with global teams.
Engagement
Remote, B2B contracts, time zones: Americas/Europe.
Fixed-scope projects or part-time/staff augmentation.

Languages

EnglishFluentPortugueseNative speakerSpanishFluent

Project history

Senior PostgreSQL DBA / DBRE

Grupo Nexxees

Internet & IT

500-1000 team member

Environment: PostgreSQL 8/9/10/13 → PostgreSQL 15/16, Linux, Replication, HA, Python, Bash
Description: Designed and executed PostgreSQL modernization and upgrade initiatives across multiple production
environments.
Responsibilities
•Planned PostgreSQL upgrade strategies
•Performed logical and in-place migrations•Implemented replication and failover configurations
•Tuned PostgreSQL instances for performance and stability
•Automated health checks and maintenance routines
•Troubleshot locking, bloat, and query performance issues
Achievements
•Successfully upgraded critical production environments
•Improved stability and observability
•Reduced manual operational effort through automation

Database Engineer / DBA

Grupo Nexxees

Internet & IT

500-1000 team member

Database Automation & Operational Tooling
Role: Database Automation Engineer
Duration: Multiple Years
Environment: Python, Bash, Linux, Oracle, PostgreSQL, MySQL, MongoDB
Description: Developed automation tooling for DBA operational activities, monitoring, health checks, reporting, and
maintenance.
Responsibilities
•Built Python automation scripts
•Automated backups and health checks
•Developed monitoring/reporting utilities•Reduced manual DBA workload
•Standardized operational procedures
Achievements
•Improved operational efficiency
•Reduced repetitive manual tasks
•Increased environment consistency

Senior DBRE / Database Engineer

Grupo Nexxees

Internet & IT

500-1000 team member

Environment: PostgreSQL, Oracle, MySQL, SQL Server, MongoDB, Linux, Python, Bash
Description: Supported the transition from traditional DBA operational practices to Database Reliability Engineering
(DBRE) methodologies focused on automation, observability, reliability, and incident reduction.
Responsibilities
•Improved database operational reliability practices
•Standardized monitoring and alerting processes•Automated repetitive DBA operational tasks
•Participated in incident analysis and root cause investigations
•Enhanced database observability and health monitoring
•Supported production stability initiatives
•Collaborated with infrastructure and application teams
Achievements
•Reduced operational toil through automation
•Improved incident response processes
•Increased database environment reliability and visibility
•Improved proactive monitoring capabilities

Senior DBA / DBRE

Grupo Nexxees

Internet & IT

500-1000 team member

Duration: Multiple years
Environment Oracle, PostgreSQL, SQL Server, MongoDB, MySQLDescription: Provided production support for mission-critical database environments, focusing on incident response,
troubleshooting, and performance recovery.
Responsibilities
•Investigated critical production incidents
•Performed root cause analysis (RCA)
•Resolved locking, deadlock, and performance issues
•Supported high-severity production outages
•Optimized problematic SQL queries and workloads
•Collaborated with application and infrastructure teams during incidents
Achievements
•Restored critical production services during incidents
•Improved database stability and response times
•Reduced recurring operational issues

Senior DBA / Performance Specialist

Grupo Nexxees

Internet & IT

500-1000 team member

Duration: Multiple years
Environment: Oracle, PostgreSQL, SQL Server, MySQL, MongoDB
Description: Resolved complex database performance incidents across enterprise production systems.
Responsibilities
•SQL query optimization
•Execution plan analysis
•Index strategy improvements
•Locking/deadlock troubleshooting
•Capacity planning and performance diagnostics
Achievements
•Resolved critical production incidents
•Improved application response times
•Reduced resource consumption

Senior Oracle DBA / Database Engineer

Grupo Nexxees

Internet & IT

500-1000 team member

Oracle Exadata Migration & RAC Consolidation
Description: Led database migration and consolidation initiatives from legacy Oracle environments to Oracle Exadata infrastructure using Oracle 19c RAC and Data Guard architectures.
Responsibilities
•Planned and executed Oracle database migrations
•Upgraded Oracle 11g/12c databases to Oracle 19c
•Configured Data Guard environments for HA/DR
•Performed performance tuning and SQL optimization
•Supported production cutovers and rollback planning
•Automated DBA operational tasks using Shell Script
Achievements
•Reduced maintenance windows during migration activities
•Improved database performance and availability
•Supported mission-critical enterprise workloads

Database Engineer / DBRE

Grupo Nexxees

Internet & IT

500-1000 team member

Environment: Oracle, PostgreSQL, MongoDB, MySQL, SQL Server, Linux
Description: Enhanced database monitoring and observability capabilities for enterprise production environments.
Responsibilities
•Implemented proactive monitoring strategies
•Investigated database alerts and production incidents
•Analyzed performance degradation scenarios
•Created health-check and operational scripts
•Improved database operational visibility
•Assisted with capacity planning and trend analysis
Achievements
•Reduced incident detection time
•Improved monitoring coverage and operational visibility
•Increased platform stability

Certificates

Oracle Certified Professional 11g, 10g

Oracle

2010

Certified Database Associate DB2 9 Fundamentals

IBM

2010

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