Senior Linux Systems Engineer

Position Summary:

DemandScience is seeking a highly skilled Senior Linux Systems Engineer to join the Lastbounce team and take ownership of a globally distributed, highly automated Linux infrastructure.

This role is responsible for the design, automation, deployment, and lifecycle management of a large-scale Linux environment spanning approximately 350 servers across 20+ global infrastructure providers. The environment is heavily automated and engineered for high performance, scalability, cost efficiency, and operational resilience.

You will play a key role in building and evolving infrastructure standards, automation frameworks, monitoring systems, and deployment pipelines that support a high-volume, real-time internal platform.

This is a hands-on infrastructure and engineering role requiring deep Linux expertise, strong automation skills, and a practical understanding of networking, performance tuning, and distributed systems.

 

Essential Job Functions “What You’ll Do”:

 

Linux Infrastructure Engineering

• Design, deploy, and manage a globally distributed fleet of Linux servers (primarily Ubuntu 24.04 LTS)
• Own the full infrastructure lifecycle, including provisioning, configuration, patching, performance tuning, and decommissioning
• Develop and maintain standardised server builds, templates, and configuration baselines
• Optimise systems for performance, reliability, scalability, and cost efficiency

Automation & Configuration Management

• Use SaltStack extensively for:
  • Configuration management
  • Orchestration
  • Automated deployments
  • State enforcement and drift correction
• Develop automation to support rapid, repeatable infrastructure deployment across multiple providers
• Automate operational workflows and eliminate manual intervention wherever possible
• Contribute to infrastructure-as-code standards and practices

Networking & Systems Integration

• Configure and troubleshoot complex networking environments, including:
  • IPv4 and IPv6 addressing and routing
  • Policy routing
  • DNS configuration and troubleshooting
  • Firewall management (ufw / iptables / nftables / provider-level firewalls)
  • VPN connectivity where required
• Diagnose and resolve network-level and system-level performance issues

Monitoring & Operational Excellence

• Work with our custom in-house monitoring and observability platform
• Monitor infrastructure health, system metrics, logs, and alerts
• Perform root cause analysis and implement long-term solutions
• Continuously improve monitoring coverage, alert quality, and operational visibility

CI/CD & Deployment Integration

• Collaborate with software engineering teams to integrate infrastructure with CI/CD pipelines
• Support automated deployment processes across development, staging, and production environments
• Ensure infrastructure supports rapid and reliable code deployment

Troubleshooting & Incident Resolution

• Act as a senior escalation point and SME for complex infrastructure issues
• Diagnose problems across the full stack, including:
  • Operating system