Luis Santos

• Configured Route 53 DNS (CNAME/Alias) with Terraform for cross-account ALB integration, reducing domain setup time by 60% • Automated S3 Lifecycle rules with Terraform, cutting storage costs by 30% through intelligent object transitions • Led troubleshooting using ephemeral, namespace-scoped pods (kubectl), reducing incident response time by 40% • Orchestrated connectivity tests between subnets/endpoints to detect firewall/routing issues before they impacted production • Developed tooling to map AWS Security Groups to EC2 instances and LBs, improving network visibility and simplifying distributed troubleshooting • Optimized resource allocation aligned with cluster node capacity, improving system stability and performance

• Built REST APIs in Java/Quarkus (microservices) for annuity and fee collection, serving 30M+ users across Brazil, Spain, and Chile • Migrated services to AWS, reducing processing time by 50% and increasing reliability • Used Apache Kafka and REST Client for inter-service communication, improving traceability and message recovery • Implemented automated tests (JUnit5, Mockito) and code quality monitoring (SonarQube), reducing rework by 20% • Optimized PostgreSQL queries, cutting data retrieval time • Applied Clean Architecture + design patterns (Chain of Responsibility, Strategy, Factory), reducing maintenance time by 50% • Configured CI/CD with GitHub Actions, accelerating deployments to test and production

• Built REST APIs in Java/Spring Boot for health plan management (monolith and microservices), serving 15M+ customers (largest health insurer in Brazil) • Used Apache Kafka and Spring Cloud OpenFeign for async communication, increasing speed and reducing data loss • Maintenance and optimization of relational and non-relational databases (PostgreSQL and MongoDB) and use of Criteria API to filter necessary information • Integrated external API for digital prescription signatures stored in S3 buckets • Wrote automated tests (JUnit5, Mockito), increasing reliability and reducing rework by ~50% • Worked in agile squads with business teams to improve product functionality

• Developed REST APIs in Java/Spring Boot for digitally signed online medical prescriptions stored in AWS S3 • Maintained PostgreSQL databases • Generated PDF documents using JasperReports • Collaborated in agile squads to improve product functionality and delivery speed

• Built APIs in Spring Boot and Python for automatic power grid recovery, reducing power restoration time by 50% • Optimized Oracle Database queries, cutting response time by 20%