Julio Cesar Oliveira Barreto
Verified Expert in Engineering
DevOps Engineer and Developer
Brasília - Federal District, Brazil
Toptal member since December 5, 2024
Julio is a DevOps engineer with a strong background in automating and managing cloud infrastructure and developing effective CI/CD pipelines. He excels in optimizing cloud environments for scalability, security, and performance. Julio's expertise also includes observability, monitoring, tracing, debugging, and performance optimization. Driven by a passion for continuous learning, he constantly seeks new technological challenges.
Portfolio
Experience
- Linux - 10 years
- Docker - 5 years
- Terraform - 5 years
- Kubernetes - 5 years
- Helm - 5 years
- Ansible - 5 years
- Google Cloud Platform (GCP) - 3 years
- GitHub Actions - 3 years
Preferred Environment
Ansible, Terraform, Docker, Kubernetes, GitHub Actions, Jenkins, Google Cloud Platform (GCP), Amazon Web Services (AWS), Prometheus, Continuous Integration (CI)
The most amazing...
...work I've done is move GitHub workflows to self-hosted runners—saving 50% of costs—and execute an internal cache for npm packages and Docker images—saving 40%.
Work Experience
DevOps Engineer
Ministry of Planning
- Managed infrastructure for a mission-critical web application, overseeing the Brazilian federal budget and utilizing a hybrid cloud environment that included VMware vSphere-based self-managed data centers and AWS cloud services.
- Supported over 400 microservices deployed in Kubernetes clusters, ensuring high availability and performance.
- Automated and optimized deployment pipelines, infrastructure provisioning, and configuration management using various technologies, including Terraform, Helm, Ansible, Docker, Kubernetes, Argo CD, Jenkins, and AWS.
Infrastructure Engineer
Toptal, LLC
- Reduced costs by around 50% by migrating GitHub workflows from GitHub to self-hosted runners.
- Saved around 40% by implementing an internal proxy cache for npm packages and Docker images.
- Worked on an initiative to create and migrate to a centralized credential solution and implemented Google Identity-Aware Proxy.
- Participated in an on-call rotation, supporting development teams by debugging and troubleshooting CI/CD pipeline issues.
- Mentored two junior team members to help them advance as engineers.
DevOps Engineer
Ministry of Economy
- Managed infrastructure for a mission-critical web application, overseeing the Brazilian federal budget and utilizing a hybrid cloud environment that included VMware vSphere-based self-managed data centers and AWS cloud services.
- Supported over 400 microservices deployed in Kubernetes clusters, ensuring high availability and performance.
- Automated and optimized deployment pipelines, infrastructure provisioning, and configuration management using various technologies, including Terraform, Helm, Ansible, Docker, Kubernetes, Argo CD, Jenkins, and AWS.
Experience
Cloud Cost Reduction
Education
Specialization Coursework in Computer Science
University of Brasilia - Brasilia, Brazil
Specialization Coursework in Computer Science
Catholic University of Goias - Goiania, Goias, Brazil
Associate Degree in Computer Science
Minas Gerais State University - Belo Horizonte, Brazil
Certifications
AWS Certified Cloud Practitioner
Amazon Web Services
CKAD: Certified Kubernetes Application Developer
The Linux Foundation
CKA: Certified Kubernetes Administrator
The Linux Foundation
EXIN IT Service Management Foundation
EXIN
Oracle Certified Professional
Oracle
Microsoft Certified Professional (MCP)
Microsoft
Skills
Tools
Terraform, Ansible, Helm, Shell, Jenkins, Grafana, Git, Packer, VMware, VMware vSphere, NPM
Platforms
Kubernetes, Docker, Google Cloud Platform (GCP), Linux, Oracle, Amazon Web Services (AWS), Rancher, Drone CI, Harbor
Languages
Bash Script, Python, Bash
Paradigms
DevOps, ITIL, Continuous Integration (CI)
Storage
PostgreSQL, SQL Server 7, Elasticsearch
Other
GitHub Actions, Prometheus, ITIL V3 Foundation Certified, Data Processing, Computer Networking, Distributed Systems, Rancher Kubernetes Engine (RKE), Argo CD
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