Senior Software Engineer (C++) Remote (Spain) High-Performance Trading Systems Up to £180k + bonus + equity

We’re hiring a Senior C++ Engineer to work on the systems that sit at the heart of a global trading platform. This is a backend, systems-focused role centred around performance-critical engineering — building the infrastructure that enables fast, reliable, and secure execution at scale.

The Role

You’ll be working on the core framework and performance-critical components that underpin the trading engine.

Your responsibilities will include: Designing and building low-level systems that support high-frequency transaction processing Developing robust, reusable components used across the trading platform Engineering for low latency, high throughput, and system resilience Working on concurrent and distributed systems operating under real production load Identifying and resolving bottlenecks across CPU, memory, and network layers Writing efficient, ma...