Senior Systems Engineer

Salary: £74,000 - 97,000 per year

Requirements:

• Experience building high-performance, latency-sensitive systems at scale.
• Background in globally distributed, real-time systems or large-scale data infrastructure.
• Strong experience with Go, Rust, or C++.
• Proficiency in Python, Java, or TypeScript.
• Experience handling large data volumes and building scalable processing pipelines.
• Strong understanding of system performance, latency measurement, and optimisation.
• Experience in real-time streaming platforms, time-series data platforms, low-latency databases or graph systems, high-frequency or electronic trading, or large-scale distributed infrastructure is ideal.

Responsibilities:

• Build systems for globally distributed synthetic testing of market data flows.
• Develop aggregation layers to process large-scale latency data.
• Create global latency views and health dashboards.
• Analyse distributed data to identify performance bottlenecks.
• Improve monitoring, diagnostics, and operational visibility.
• Contribute to the architecture and development of a new platform from the ground up.

Technologies:

• Java
• Python
• Rust
• TypeScript

More:

We are seeking a Senior Systems Engineer to join a greenfield initiative within one of the worlds largest market data platforms. We will build the capability to monitor, measure, and understand market data performance across 40 global data centres. The role focuses on synthetic testing, latency measurement, and large-scale data aggregation, transforming performance data into global latency views and actionable health insights. This is a 6-month contract likely to extend, based in London with 3 days onsite per week, and the contract is inside IR35. The budget will be discussed with suitable candidates.

last updated 38 week of 2026