Core C++ Systems Engineer — High-Performance Trading Infra

NJF Global Holdings Ltd; Greater London; On-site; GBP 120,000 - 180,000; Full time

Job summary

NJF Global Holdings Ltd in London is assembling a small, elite team of systems engineers to design the core infrastructure that powers a highly sophisticated trading platform. This is not application development; it is deep, performance‑critical work where nanoseconds matter and correctness is non negotiable.

You will own end‑to‑end components across market data, execution, simulation and backtesting, collaborating with traders and researchers to push latency down and throughput up.

Qualifications

• 2+ years of experience building performance critical systems in C++.
• Strong background in performance optimisation across CPU, memory, and network boundaries.
• Experience with low latency systems, distributed systems, or high throughput pipelines.
• GPU or accelerator experience is a strong plus.
• Comfortable working close to the metal and reasoning about systems behaviour.
• A collaborative, low ego approach with the ability to own problems end to end.
• Strong communication skills and the confidence to engage with senior technical stakeholders.

Responsibilities

• Designing and building high performance C++ systems that sit directly in the live trading path.
• Optimising latency, throughput, and determinism across highly concurrent systems.
• Working on market data capture, normalisation, and internal distribution at scale.
• Building and evolving simulation and backtesting infrastructure used by researchers and traders.
• Going deep on memory behaviour, data structures, and concurrency models.
• Collaborating closely with traders and researchers on strategy and execution plumbing.

Skills

C++

Performance optimization

Low latency

Distributed systems

Concurrency

Memory management

Job description

NJF Global Holdings Ltd in London is assembling a small, elite team of systems engineers to design the core infrastructure that powers a highly sophisticated trading platform. This is not application development; it is deep, performance‑critical work where nanoseconds matter and correctness is non negotiable.

You will own end‑to‑end components across market data, execution, simulation and backtesting, collaborating with traders and researchers to push latency down and throughput up.