Linux Engineer

iSAM; London; On-site; GBP 50,000 - 80,000; Full time

Job summary

A leading company in London is seeking a skilled Linux Engineer to manage and optimize Linux server environments, focusing on low-latency trading and automation. This role requires a deep understanding of Linux systems and significant experience with scripting and DevOps tools. The successful candidate will play a crucial role in enhancing operational efficiency and driving innovation within the infrastructure team.

Qualifications

• 5+ years’ experience administering Linux servers in performance-sensitive environments.
• Proficiency in Python and bash scripting; experience with Ansible required.
• Experience with monitoring tools like Prometheus, Grafana, ELK.

Responsibilities

• Design, implement, and maintain Linux server environments across global data centers.
• Tune Linux systems to support low-latency trading workloads.
• Identify operational inefficiencies and design automated solutions.

Skills

Linux Expertise

Networking Fundamentals

Scripting & Automation

Observability

DevOps Tooling

Problem Solving

Containers and orchestration

Tools

Ansible

Terraform

Git

Job description

Linux Engineer

Department: Infrastructure

Employment Type: Permanent

Location: London

Description

We are seeking a talented and motivated Linux Engineer to join our high-performance platform engineering team. The successful candidate will be responsible for managing and optimising Linux server environments, supporting low-latency trading and LLM servers and driving automation.

Key Responsibilities

• System Administration: Design, implement, monitor, and maintain Linux server environments across global data centers and co-located facilities.
• Performance Engineering: Tune Linux systems and kernel parameters to support high-throughput, low-latency trading workloads.
• Automation & Configuration Management: Designing and implementing automation solutions using Infrastructure as Code (IaC) tools such as Ansible, Python, and Terraform to streamline and standardize operational workflows
• Continuous Improvement: Identify operational inefficiencies and design long-term, automated solutions for infrastructure scaling and resilience.
• Data Centre Operations: Troubleshoot and optimise data centre operations, occasionally performing hands-on work, addressing issues related to performance, hardware failures, power management, and cabling and networking failures.

Skills, Knowledge and Expertise

Required Skills & Experience

• Linux Expertise: 5+ years’ experience administering and engineering Linux-based systems in performance-sensitive environments.
• Networking Fundamentals: Solid understanding of infrastructure networking concepts such as IP addressing, subnetting, VLAN configuration, and their practical application in Linux-based environments
• Scripting & Automation: Proficiency in Python and bash scripting; experience with Ansible required.
• Observability: Experience with monitoring and log aggregation tools (e.g., Prometheus, Grafana, ELK).
• DevOps Tooling: Experience with Terraform, Git, CI/CD, and infrastructure-as-code practices.
• Problem Solving: Proven ability to identify performance bottlenecks and resolve complex system-level issues.
• Containers and orchestration: Knowledge of tools such as Docker/containerd and Kubernetes.

Beneficial Experience

• Deploying and managing GPU servers
• Experience working with AWS infrastructure and services.
• Familiarity with managing or integrating on-premise storage solutions.

Personal Attributes and Key Outcomes

Personal Attributes

• Clear communication – explains technical concepts concisely and effectively
• Adaptability – adjusts to new technologies and unexpected challenges
• Analytical thinking – breaks down complex issues logically and methodically
• Decision-making – balances speed and accuracy when making technical decisions
• Collaboration over competition – prioritises team success over individual wins
• Accountability – follows through on commitments and owns mistakes
• Patience – supports teammates as they learn or troubleshoot issues
• Open to feedback – accepts and applies suggestions for improvement
• Growth mindset – always looks for ways to improve skills and workflows
• Proactiveness – takes initiative instead of waiting for instructions

Key Outcomes

Success in a Linux Engineer role at iSAM isn’t just about writing great code—it’s about building relationships, problem-solving, and making a lasting impact on the team and business.

• Contributes to a positive, inclusive team culture where knowledge sharing is the norm
• Improves automation frameworks, reducing manual effort and deployment risks
• Fixes issues swiftly and documents solutions for future reference
• Takes full responsibility for automation scripts, CI/CD pipelines and IaC tools
• Recognised by peers and leadership as a reliable resource for automation challenges
• Trusted to make informed decisions that align with team and company goal