Senior Software Engineer (C++)
Remote (Spain)
High-Performance Trading Systems
Up to £180k + bonus + equity
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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, maintainable, and well-tested C++ code
* Partnering with cross-functional teams to deliver scalable technical solutions
What They’re Looking For
* Strong experience building production systems in C++
* Background working on high-performance, low-latency, or high-throughput systems
* Solid understanding of multithreading, concurrency, and memory management
* Experience working in Linux-based environments
* Familiarity with distributed systems or large-scale architectures
* Experience with performance xkdbapo tuning and profiling at system level
* Exposure to other languages (e.g. Python, Java, SQL) is beneficial
* Interest in trading systems, financial infrastructure, or market mechanics is a plus
* Comfortable operating in a fast-paced, delivery-focused environment
Why This Role
* Strong comp (including bonus & equity)
* Opportunity to solve complex, performance-driven engineering problems
* High ownership culture
* Remote-first setup with a globally distributed team