Steven Castillo

Database Engineer & DBA with 15+ years of experience optimizing, designing, and maintaining high-performance database systems. Expert in SQL Server and PostgreSQL, with strong experience in AWS Aurora and RDS, ETL pipelines, and BI systems. Proven ability to reduce query latency, improve data reliability, and deliver scalable data solutions in high-pressure environments.

SSRS / Database Developer at Allen & Company LLC (2024-01 – 2026-12)

• Optimized reporting queries, reducing execution time by up to 40%
• Migrated reporting architecture to stored procedures improving maintainability
• Supported high-profile financial conferences ensuring 99.9% uptime

DBA / Database Developer at BairesDev (2020-01 – 2024-12)

• Led database optimization initiatives improving performance across multiple clients
• Designed ETL pipelines handling large-scale data transformations
• Developed complex SQL solutions for data processing, transformation, and delivery
• Executed cross-platform database migrations with zero data loss

DBA / Database Developer at HealthPlan Data Solutions (2009-01 – 2020-12)

• Managed mission-critical SQL Server environments with high availability
• Built BI solutions and dashboards improving business decision-making
• Developed and maintained the Spotlight system supporting core business operations
• Designed and implemented analytical and transactional data structures
• Built and optimized SQL Server solutions using T-SQL, SSIS, SSAS, and SSRS
• Developed complex stored procedures to support business reporting needs
• Led data integration initiatives across SQL Server, Oracle, and AWS Aurora PostgreSQL
• Used Pentaho Data Integration to build scalable data warehouse pipelines
• Managed database administration tasks including backup and recovery strategies, data integrity and retention policies, security and storage optimization, and maintenance plans and performance tuning

Software Developer at Multiple Companies (2008-01 – 2010-12)

• Developed and maintained enterprise applications
• Improved system performance and resolved production issues

Bachelor's degree in Computer Science Engineering – Interamericana University of Costa Rica