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Urgent! Administrador de Sistemas Pleno / Systems Administrator, Senior Job Opening In Brazil, Brazil – Now Hiring Newfold Digital

Administrador de Sistemas Pleno / Systems Administrator, Senior



Job description

Key Responsibilities

  • 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
  • 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
  • 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
  • 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)
  • 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)
  • 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.

    Why you’ll love us.

  • We’ve evolved; we provide three work environment scenarios.

    You can feel like a Newfolder in a work-from-home, hybrid, or work-from-the-office environment.

  • Work-life balance.

    Our work is thrilling and meaningful, but we know balance is key to living well.

  • We celebrate one another’s differences.We’re proud of our culture of diversity and inclusion.

    We foster a culture of belonging.

    Our company and customers benefit when employees bring their authentic selves to work.

    We have programs that bring us together on important issues and provide learning and development opportunities for all employees.

    We have 20 + affinity groups where you can network and connect with Newfolders globally.

  • We care about you.We provide excellent benefits from OSDE 310 Health Care, Monthly Salary Reviews, Tuition Reimbursement, Internet Reimbursement, In-company English Lessons, LinkedIn learning, Referral Program Bonus, F5 extra days off, Annual Bonus, and an opportunity to work on Global projects with Multicultural team.


  • Required Skill Profession

    Computer Occupations



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