Paulo

Paulo Roberto Selegato Filho
Software & Cloud Engineer | AWS Serverless | FinOps | Python
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SUMMARY

AWS Cloud Engineer with 3+ years of hands-on experience designing, deploying, and optimizing cloud-native and serverless architectures on AWS. Proven track record of reducing infrastructure costs by up to 90% through serverless modernization and FinOps practices. Experienced with AWS SAM, Lambda, EC2, ECS, EKS, DynamoDB, Aurora, and S3. Proficient in Python, CI/CD pipelines, infrastructure automation, and observability. AWS Certified Cloud Practitioner; currently pursuing AWS Solutions Architect Associate. Fluent in English and Portuguese. Open to full-time remote roles.
SKILLS

Cloud Platforms: AWS (EC2, Lambda, S3, ECS, EKS, RDS, Aurora, DynamoDB, DocumentDB, CloudFront, API Gateway, SNS, SQS, Step Functions)
Serverless & IaC: AWS SAM, Serverless Application Model, Event-Driven Architecture, Microservices, Infrastructure as Code
Cost & Governance: AWS Cost Explorer, FinOps, Resource Tagging, Billing and Cost Management, Cost Optimization
Observability: CloudWatch, Dashboards, Metrics, Alarms, Root Cause Analysis, Incident Management, SLA Monitoring
Containers & Orchestration: Kubernetes, Docker, ECS, EKS, Container Management
Programming & Dev: Python, SQL, NoSQL, Git, CI/CD, OOP, Unit Testing, REST API, API Testing
Databases: DynamoDB, Aurora, MySQL, MongoDB, DocumentDB, RDS
Agile & Tools: Scrum, Kanban, Jira, Miro, Technical Documentation
Languages: English (Professional), Portuguese (Native)
EXPERIENCE

Software EngineerFebruary 2026 – Present
Cencosud S.A. — Remote, Brazil
• Own end-to-end delivery of systems from planning and architecture to infrastructure provisioning and implementation, operating with high ownership and delivering robust solutions independently.
• Design and build scalable, cost-efficient solutions on AWS using serverless and distributed architectures, translating business requirements into technical solutions that balance scalability, reliability, and cost.
• Develop event-driven systems, REST APIs, and data processing workflows using AWS Lambda, SQS, SNS, API Gateway, DynamoDB, and AWS SAM.
• Define system architecture and select appropriate AWS services, ensuring production readiness with strong focus on observability, monitoring, and error handling.
• Build loosely coupled, maintainable systems and optimize performance and resource usage to maintain cost-efficiency at scale.
• Provision and manage cloud infrastructure as part of the development lifecycle using Infrastructure as Code practices.

Cloud Developer / Cloud SpecialistApril 2025 – January 2026
Stefanini Global — Remote
• Designed and provisioned AWS cloud architectures using EC2, Lambda, S3, ECS, and AWS SAM, evaluating technical trade-offs across scalability, security, and cost optimization.
• Led serverless modernization initiative: refactored legacy workloads to event-driven serverless architecture using AWS SAM and Lambda, achieving 90% reduction in operational costs across 3 production services.
• Implemented FinOps governance using AWS Cost Explorer and resource tagging strategies, delivering financial visibility and cost accountability across 4 business units.
• Built and maintained observability stack with CloudWatch dashboards, metrics, and alarms, achieving 99.9% availability SLA across critical production systems.
• Developed, refactored, and optimized Python-based Lambda functions with focus on performance, unit testing, and OOP best practices, reducing cold-start latency by 35%.
• Drove continuous cloud cost optimization for existing services, improving efficiency and performance without compromising reliability or security.
System Analyst / IaaS OperatorFebruary 2024 – March 2025
Stefanini Global — Remote
• Operated and supported AWS IaaS environments including EC2, ECS, EKS, S3, RDS, Aurora, and DynamoDB, ensuring high availability, security, performance, and cost efficiency across 10+ production workloads.
• Reduced manual provisioning time by 60% through infrastructure automation and standardization using IaC templates and scripting in Python and Bash.
• Performed incident troubleshooting and root cause analysis, reducing mean time to resolution (MTTR) by 40% through runbook documentation and process standardization.
• Acted as technical interface between infrastructure, development, and business teams, translating requirements into reliable AWS cloud solutions with documented SLAs.
• Supported application deployments and infrastructure changes across development, staging, and production environments, following AWS Well-Architected Framework best practices.
• Contributed to CI/CD pipeline improvements and deployment automation, reducing release cycle time and improving deployment reliability.
PROJECTS

Push-Notification Platform
Architected a modular, event-driven push notification system on AWS supporting multiple input sources. Implemented reliable delivery, retry handling, and dead-letter queues using Lambda, SQS, and SNS. Achieved 90% cost reduction compared to previous architecture. GitHub: github.com/Selegato/Notification-Hub-Platform
Dynamic Campaign Platform
Designed serverless campaign processing platform on AWS handling approximately 150,000 purchases per month. Integrated external partner APIs and notification workflows using AWS SAM, Lambda, DynamoDB, and API Gateway. Total infrastructure cost: ~$5 per month. GitHub: github.com/Selegato/Dynamic-Campaign-Platform
Offer Hub Platform
Built mission-critical, modular offer hub supporting 20 supermarkets and approximately 50,000 daily requests. Centralized campaign ingestion and multi-channel offer delivery with elastic scalability via serverless architecture on AWS. GitHub: github.com/Selegato/Offer-Hub-Platform
CERTIFICATIONS

AWS Certified Cloud Practitioner — Amazon Web Services | Issued March 2025
AWS Certified Solutions Architect – Associate — In progress, expected 2026