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  • Senior Security Engineer - Johannesburg - Doxim Inc.

    Doxim Inc.
    Doxim Inc. Johannesburg

    2 weeks ago

    Default job background
    Technology / Internet
    Description

    Senior Systems Security Engineer

    We are seeking an experienced Senior Linux Systems Security Engineer to oversee cloud and on-premise infrastructure security, system updates, and certificate management. The ideal candidate will have extensive experience with Linux systems administration, security protocols, and automation. You will collaborate with cross-functional teams to deliver seamless solutions that meet the needs of our business, including product support for various Doxim products hosted on these platforms.

    Responsibilities

    1. Manage and maintain security updates across multiple Linux distributions, focusing on Amazon Linux 2023.
    2. Oversee package management and updates for critical infrastructure components, including GitLab, MySQL, NGINX, and Wazuh.
    3. Implement and maintain email security protocols, such as DNS, DKIM, and SPF configurations.
    4. Manage enterprise-wide certificate lifecycle, including automated deployment using various certificate authorities and management systems.
    5. Design and implement Zero-Trust architecture and VPN solutions.
    6. Develop and maintain custom RPM repositories and packages.
    7. Create and maintain automation scripts using Bash and PowerShell.
    8. Perform security audits and implement remediation measures.
    9. Design, deploy, and maintain cloud infrastructure on AWS and Azure platforms.
    10. Collaborate with architecture and development teams to ensure cloud solutions align with business requirements.
    11. Monitor and optimize cloud resources to ensure performance, security, and cost-efficiency.
    12. Implement and manage DevOps practices, including CI/CD pipelines and automation.
    13. Stay up-to-date with industry trends and emerging technologies to recommend enhancements to the cloud infrastructure.

    Qualification / Experience Requirements:

    1. Bachelor's degree in computer science, engineering, or a related field (or equivalent work experience).
    2. Strong proficiency in DNS management, Cloudflare, GitLab, and certificate management and deployment.
    3. Strong proficiency in Linux system administration and troubleshooting (minimum 7 years).
    4. Extensive experience with package management systems (RPM, YUM, DNF).
    5. Experience implementing and managing DevOps practices and tools.
    6. Solid understanding of networking concepts and protocols.
    7. Strong knowledge of email security protocols and implementations.
    8. Advanced scripting abilities in Bash, Python, and PowerShell.
    9. Experience building and maintaining custom RPM packages.
    10. Strong communication skills to interact with both technical and non-technical stakeholders.
    11. Deep understanding of Zero-Trust security principles and VPN technologies.

    Preferred Qualifications

    1. Experience with containerization technologies (Docker, Kubernetes).
    2. Familiarity with infrastructure as code (IaC) tools like Terraform, Ansible, or CloudFormation.
    3. Knowledge of database administration (MS SQL, MySQL) is a plus.
    4. Strong knowledge of cloud infrastructure resources (AWS/Azure).

    Attributes: Communication Skills:

    1. Ability to interact effectively with stakeholders, architects, or solve technical challenges and issues.
    2. Provide prompt and accurate feedback to relevant stakeholders.
    3. Communicate effectively with managers, developers, and other stakeholders.
    4. Escalate unresolved issues to appropriate internal teams and senior stakeholders.
    5. Experience mentoring junior team members.

    Ownership:

    1. Establish standards or best practices for cloud deployments, configuration, etc.
    2. Take ownership of issues reported and see problems through to resolution.
    3. Prioritize and manage several open issues to closure.
    4. Track issues through to resolution, within agreed time limits or commitments.
    5. Make use of internal tools for task management (experience with ITSM and/or Atlassian suite advantageous).
    6. Document and update the technical knowledge base, driving a learning culture and equipping the broader team for success.

    Knowledge:

    1. Proven knowledge of networking concepts is essential (e.g., TCP/IP, DNS, DHCP, subnets, routing, and firewalls).
    2. Experience implementing 24/7/365 monitoring and detection with alerts (e.g., uptime, utilization, resources, workloads, and optimization). Use of CloudWatch, Graylog, Zabbix, or other tools is essential.
    3. Experience deploying and implementing various cloud or open-source-based tools to support operational requirements.
    4. Experience implementing security best practices, such as IAM and roles, public clouds vs private zones, least privileges, segregation of duties, and change control, etc.
    5. Proven experience implementing CI/CD techniques (Octopus Deploy, TeamCity, Atlassian Pipelines, Jenkins, etc.).
    6. Beneficial experience promoting and architecting serverless workloads (e.g., Lambda, API Gateway, etc.) is highly beneficial.
    7. Experience in Docker and Kubernetes is beneficial.
    8. Experience migrating on-premises workloads to cloud or hosted-based environments; specifically, Windows and database (MSSQL, PostgreSQL, or MySQL) is beneficial.
    9. Experience in orchestration (Terraform, CloudFormation) is beneficial.

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