João Simões

Redesigned the deployment architecture of a Kubernetes-based microservices platform, reducing deployment time from ~40 minutes to under 10 minutes by restructuring Helm charts and optimizing CI/CD workflows. Built and operated a large-scale data ingestion platform processing ~20PB/month, identifying bottlenecks in S3 and EFS usage and introducing parallelization strategies to improve throughput and reliability. Implemented a full observability stack (Prometheus, Grafana, Tempo, Loki, OpenTelemetry), defining metrics, traces, and logs to debug distributed production systems. Developed automation to convert infrastructure alerts into actionable incidents, reducing manual triage and improving response times. Debugged production issues across Kubernetes workloads and Python services, working beyond infrastructure to resolve application-level failures.

Designed and implemented Terraform-based infrastructure for a microservices platform used daily by 100+ engineers, owning the full CI/CD lifecycle. Built and maintained CI/CD pipelines (GitLab CI, Jenkins) for consistent build, testing, and deployment workflows across multiple environments. Reduced release cycle time from days to hours by introducing automated pipelines and reusable environment templates. Collaborated directly with development teams to debug deployment issues and improve service reliability.