Senior Platform Engineer | Backend, Cloud Infrastructure & Reliability
Joinville, Santa Catarina, Brazil
I am a Platform Engineer with end-to-end ownership across backend development, cloud infrastructure and CI/CD for more than six SaaS products.
My work focuses on designing, building and operating resilient distributed systems using Node.js, TypeScript, AWS, PostgreSQL, Redis, RabbitMQ, Terraform, Ansible, Docker and Kubernetes.
I combine software engineering, cloud infrastructure and reliability practices to improve application performance, availability, deployment safety, observability and developer experience.
- Reduced latency on critical API endpoints by 50–80% through Redis caching, SQL refactoring and removal of N+1 query patterns
- Reduced database load by approximately 70%
- Performed PostgreSQL upgrades from version 13 to version 17 with zero downtime
- Maintained production availability above 99.9% during platform and runtime upgrades
- Operated and evolved AWS environments supporting more than six SaaS products
- Implemented distributed tracing across RabbitMQ, REST and GraphQL workloads
- Designed reusable CI/CD pipelines and infrastructure automation
- Improved resilience using retries, dead-letter queues, rate limiting, circuit breakers and health checks
- Designed asynchronous document-processing workloads to prevent CPU and memory saturation
- Asynchronous workloads
- Dead-letter queues
- Retry and backoff strategies
- Idempotency
- Rate limiting
- Circuit breakers
- Event-driven integrations
- SQL query tuning
- Index analysis
- N+1 query elimination
- Cache strategies
- Database migrations
- Zero-downtime upgrades
- Performance and resilience
AWS services:
EC2 · RDS · S3 · CloudFront · IAM · Secrets Manager · VPC · PrivateLink · ECR · EKS · Load Balancers · CloudTrail
- Reusable pipeline templates
- Automated build, test and deployment workflows
- Infrastructure as Code
- Deployment automation
- Conventional Commits
- Commitlint
- Husky
- Code review
- Distributed tracing
- Application and infrastructure metrics
- Structured logs
- SLI and SLO dashboards
- Error-rate monitoring
- Latency percentiles
- Liveness and readiness health checks
- Incident investigation
- Email: luiz-fischer@hotmail.com
- LinkedIn: Luiz Otávio Fischer