Systems Administrator, Senior

We are seeking a seasoned Senior Systems Administrator to lead the management and optimization of our Cloudflare environment and broader cloud infrastructure. This role demands hands-on expertise in Cloudflare services—DNS, WAF, CDN, caching, proxy, and security configurations—to enhance the performance and protection of our global web platforms.

You will also manage cloud platforms such as OCI, AWS, Azure, or GCP, with a strong focus on Linux/Unix systems, automation, observability, and hybrid infrastructure operations.

Key Responsibilities

Cloudflare Administration

• Manage DNS, WAF, firewall rules, caching, and rate limiting policies

• Optimize proxy configurations, security settings, and performance features (e.g., Argo, Workers)

• Mitigate threats (DDoS, bots) and conduct regular audits

• Maintain documentation and stay updated with new Cloudflare features

Cloud & Infrastructure Management

• Administer and optimize OCI or other cloud platforms (compute, storage, IAM, networking)

• Automate deployments using Terraform, Ansible, and CI/CD pipelines

• Monitor and troubleshoot performance using Grafana, Prometheus, Zabbix, etc

System Operations

• Perform system maintenance and patching on Linux/Unix platforms

• Troubleshoot OS, hardware, and database (MySQL/PostgreSQL) issues

• Automate routine tasks via Bash, Python, or Ruby scripts

Required Skills

• 3–5+ years of hands-on Cloudflare experience in production

• Strong understanding of Cloudflare WAF, DNS, CDN, caching, and Zero Trust

• Expertise in managing proxies (NGINX, HAProxy), DDoS mitigation

• Scripting knowledge: Python, Bash, or Ruby

• Proficiency with IaC tools (Terraform), observability (Grafana, Prometheus)

• Solid networking fundamentals: TCP/IP, HTTP/S, DNS, TLS/SSL

• Cloud experience with OCI or equivalent (AWS, Azure, GCP)

Preferred Experience

• 6+ years managing hybrid cloud infrastructure

• Experience with Cloudflare Workers, Pages, or Load Balancing

• Familiarity with CI/CD, Ansible, Puppet, or OCI CLI

• Security/cloud certifications (OCI, AWS, Azure)

Why you'll love us

• We offer a 100% remote position with a monthly home office allowance of R$180.00 and an additional allowance for purchasing items for your office.

• We provide Meal Vouchers or Food Vouchers worth R$44.55 per working day.

• Health and dental insurance with no co-payment for employees.

• Well-being program: Wellhub and Telemedicine!

• Do you have a dog, cat, rabbit, hamster, goat, turtle, or even a mini dragon? We have a partnership for pet health insurance!

• Life insurance.

• Free website hosting.

• Merit and promotion annual cycle.

And muuuuuuch more!