Lead Systems Reliability Engineer (Linux & Distributed Systems)

TL;DR

Lead Systems Reliability Engineer (Linux & Distributed Systems): Building and maintaining a high-scale data-driven advertising platform with an accent on performance engineering, hardware optimization, and distributed systems reliability. Focus on tuning Linux kernels, benchmarking next-gen hardware, and designing automation for stateful systems at massive scale.

Location: London

Company

The world’s leading independent platform for digital advertising, helping brands reach audiences across the open internet.

What you will do

• Lead engineering teams to plan and manage global work streams, systems, and data structures across cloud and traditional datacenters.
• Design and improve infrastructure automation tailored for stateful systems at scale.
• Own the operations for Linux-based systems running Aerospike, Kafka, and MongoDB.
• Review new use cases and serve as a technical point of contact within an on-call rotation.
• Benchmark and analyze next-generation hardware offerings to optimize system throughput.

Requirements

• Deep expertise in the Linux operating system.
• Proven leadership experience and the ability to mentor other engineers.
• Advanced troubleshooting skills using the scientific method to isolate CPU and IO bottlenecks.
• Must be based in London

Nice to have

• Experience with physical on-prem hardware internals and operations.
• Background in performance testing and tuning.
• Knowledge of relational or NoSQL databases.
• Experience with Ansible, PyInfra, Chef, Prometheus, or Kubernetes.
• Proficiency in Python, Ruby, Rust, Bash, Golang, or C#.

Culture & Benefits

• Opportunity to work with bleeding-edge hardware, including nodes with 300TB NVMe and 512 cores.
• Direct collaboration with major vendors like AMD to run PoCs and optimize technology.
• Inclusive and diverse global team environment that encourages curiosity and critical thinking.
• Work on systems with massive scale, processing over 5MM QPS per node.