Senior Linux & Network Infra Engineer — High-Perf, Flexible

Grid Dynamics; Greater London; On-site; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Medical insurance

Sports benefits

Professional development opportunities

Corporate events

Job summary

Grid Dynamics is seeking a Senior Network & Linux Infrastructure Engineer to design, deploy and support large-scale on‑premises infrastructure for mission‑critical trading applications.

You’ll work across Linux, enterprise networking, automation and observability to ensure security, resilience and high‑performance workloads, collaborating with software engineering teams and production support.

Qualifications

• 5+ years’ experience supporting enterprise Linux infrastructure.
• Strong Linux administration experience within production environments.
• Excellent understanding of Linux internals, kernel behaviour and operating system performance.
• Strong networking expertise across TCP/IP, routing and switching.
• Experience configuring and supporting enterprise network infrastructure.
• Hands‑on experience with Cisco and/or Arista networking technologies.
• Strong understanding of multicast networking including IGMP and PIM.
• Experience supporting physical data centre infrastructure.
• Strong scripting skills using Python, Bash or Go.
• Experience automating infrastructure and operational processes.
• Hands‑on experience with monitoring and observability platforms including Prometheus, Grafana, Splunk or ELK.
• Experience performing root cause analysis and resolving complex production issues.
• Strong understanding of change management within critical production environments.

Responsibilities

• Design, deploy and maintain enterprise Linux infrastructure supporting mission‑critical applications.
• Build and support high‑performance network environments across multiple data centres.
• Configure and maintain routing, switching and multicast networking infrastructure.
• Optimise Linux systems through kernel tuning, CPU affinity, memory optimisation and network stack configuration.
• Engineer resilient, highly available infrastructure with a focus on performance and reliability.
• Automate infrastructure provisioning, configuration management and operational workflows using scripting and Infrastructure as Code principles.
• Provide L3 production support for complex infrastructure issues and major incidents.
• Perform root cause analysis and implement permanent improvements to reduce operational risk.
• Execute infrastructure upgrades and change activities through controlled change management processes.
• Work closely with software engineering teams to optimise application performance on Linux platforms.
• Implement monitoring, alerting and observability across Linux, networking and infrastructure services.
• Ensure infrastructure complies with security standards, governance and operational best practice.
• Contribute to capacity planning, disaster recovery and infrastructure lifecycle management.
• Document infrastructure designs, operational procedures and technical standards.

Skills

Linux administration

Networking (TCP/IP)

Scripting (Python, Bash, Go)

Observability tools (Prometheus, Graf—

Tools

Cisco/Arista networking

Job description

Grid Dynamics is seeking a Senior Network & Linux Infrastructure Engineer to design, deploy and support large-scale on‑premises infrastructure for mission‑critical trading applications.

You’ll work across Linux, enterprise networking, automation and observability to ensure security, resilience and high‑performance workloads, collaborating with software engineering teams and production support.