Freelance Linux/Cloud Infrastructure Engineer

17 hours ago

Chennai, Tamil Nadu, India ThreatXIntel Full time ₹ 5,00,000 - ₹ 15,00,000 per year

Company Description

ThreatXIntel is a startup cyber security company focused on protecting businesses and organizations from cyber threats. Our team of seasoned professionals provides a range of services including cloud security, web and mobile security testing, cloud security assessment, and DevSecOps. We are driven to offer personalized, affordable solutions that cater to the unique needs of our clients. By taking a proactive approach to security, we continually monitor and test digital environments to identify vulnerabilities before they can be exploited. Our mission is to deliver exceptional cyber security services to give our clients peace of mind, enabling them to concentrate on growing their business.

We are looking for an experienced
Linux/Cloud Infrastructure Engineer
to join our team on a freelance/contract basis. This role involves working across Linux/Windows administration, Oracle Cloud Infrastructure (OCI), security compliance, and automation. You'll be contributing to high-impact security and DevOps initiatives while supporting operations in a dynamic, customer-facing environment.

Key Responsibilities

  • Maintain, patch, and secure Linux (primarily Red Hat) and Windows systems.
  • Ensure compliance with
    NIST 800-53
    , customer-specific baselines, and
    CIS benchmarks
    .
  • Manage Oracle Cloud Infrastructure (OCI) services, including networking, compute, and storage.
  • Automate provisioning, configuration, and compliance using
    Terraform
    and
    Ansible
    .
  • Build and maintain CI/CD pipelines for customer self-service deployments.
  • Identify, analyze, and remediate vulnerabilities across OS and applications.
  • Support operational work beyond core Linux/OCI functions (flexibility required).
  • Collaborate with customers and internal teams on design, architecture, and security initiatives.
  • Develop scripts and automation (Bash, Python, PowerShell).
  • Document compliance checks, operational procedures, and automation workflows.

Required Skills & Experience

  • 5+ years as a Linux Systems Engineer (Red Hat preferred).
  • Strong Windows administration and security baseline knowledge.
  • Hands-on experience with
    Oracle Cloud Infrastructure (OCI)
    services.
  • Proficiency with
    Terraform (must-have)
    and Ansible.
  • Solid understanding of
    NIST 800-53, CIS benchmarks, and compliance frameworks
    .
  • Experience in
    vulnerability scanning and remediation
    (Tenable, Qualys a plus).
  • Familiarity with
    CI/CD pipelines and DevOps practices
    .
  • Scripting skills (Bash, Python, or PowerShell).
  • Strong troubleshooting across OS, cloud, and networking layers.

Nice-to-Have Skills

  • Knowledge of OCI DevOps services and pipelines.
  • Familiarity with hardening tools and enterprise vulnerability scanners.
  • Networking (DNS, VPN, Firewalls, Load Balancers).
  • Experience with multi-cloud/hybrid (AWS/Azure/GCP).

Soft Skills

  • Adaptability – ability to wear multiple hats (operations, security, DevOps, architecture).
  • Strong communication skills for customer and team interactions.
  • Team-oriented mindset, with willingness to expand technical horizons.

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