Remote C++ Software Engineer

Salary: £60,000 - 80,000 per year

Requirements:

• Strong C++ and Linux systems programming experience (3+ years)
• Ability to work close to the metal and understand the systems underlying your code
• Experience with performance-sensitive systems, including profiling, optimisation, and deterministic behaviour
• Familiarity with networking fundamentals, including TCP/UDP and socket programming
• Go experience is a strong bonus; willingness to learn and use Go internally
• Python skills for scripting, automation, testing, data analysis, tooling, and operational workflows
• Experience with Git and shell scripting
• Financial services or trading technology experience is a plus, but not essential
• Delivery-focused approach, with a willingness to iterate and ship work into production
• Ownership of production systems, including incident response, investigation, and follow-through; 15-minute acknowledgement SLA during working hours
• Clear documentation and proactive communication across a distributed, multi-time-zone team
• Commitment to clean, testable code, thoughtful peer reviews, and continuous improvement
• Curiosity and willingness to learn and use AI tools
• Existing right to work in the UK; visa sponsorship is not available

Responsibilities:

• Build low-latency trading infrastructure and core components of our Switchboard platform, including pricing engines, connectivity gateways, market-data systems, and messaging
• Design, test, deploy, support, and improve software throughout its full lifecycle
• Work with modern C++20 and Go on Linux, AWS cloud-native infrastructure, and colocation in key data centres
• Optimise microsecond-level latency and high-throughput messaging
• Develop market-data and reference-data pipelines across multiple asset classes
• Integrate with global banks and liquidity providers using the FIX protocol
• Build and maintain observability and monitoring, including dashboards, alerting, and metrics
• Support reliable production systems, investigate and resolve incidents, and provide Level 3 support during critical incidents
• Work occasional hours outside the normal working day for production releases and scheduled maintenance windows

Technologies:

• AI
• AWS
• Cloud
• Git
• Support
• Linux
• Network
• Python
• C++
• HTTP
• Windows
• microservices

More:

We are Reactive Markets, the 2026 OTC Trading Platform of the Year according to Risk.net. Our network handles more than $50 billion in daily trading volumes across FX, equities, and cryptocurrency, connecting over 40 leading liquidity providers. We are hiring a full-time C++ Software Engineer for a remote, UK-based role on our small, senior engineering team, building high-performance trading systems. We offer up to 30 days of leave plus bank holidays, private health insurance, pension, life insurance, dental and optical cashback, cycle-to-work benefits, socials, and offsites. We support flexible remote work, a sustainable pace, and career growth into senior, performance-specialist, or technical-leadership roles. Our hiring process has three video-call stages: an initial conversation, a hiring-manager conversation, and a technical interview; the latter two may change order. We welcome applications from all qualified candidates and can accommodate reasonable adjustments during recruitment.

last updated 40 week of 2026