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Senior C++ Low-Latency Developer | UK, Netherlands or France|Remote
- Locations: United Kingdom, Netherlands, or France
- Work model: Fully remote
- Employment: 12-month contract
- Compensation: £200,000 - £300,000
- Conversion: Opportunity to convert to permanent by mutual agreement
- Level: Senior Individual Contributor
- Work authorization: Existing right to work in one of the listed countries of residence required
About the opportunity
- Join a sophisticated financial technology environment building high-performance trading infrastructure
- Work on greenfield systems processing high-throughput financial market data
- Design and develop performance-critical software using modern C++
- Own technical delivery from architecture through testing and production deployment
- Solve complex latency, networking, concurrency, and distributed-systems challenges
- Work in a senior hands-on engineering position rather than a management role
What you'll own
- Design and build low-latency distributed systems for financial market data
- Develop performance-critical components using modern C++
- Own architecture, implementation, testing, optimization, and deployment
- Build systems supporting high-throughput and latency-sensitive workloads
- Optimize application performance across CPU, memory, networking, and concurrency
- Work with TCP, UDP, multicast, messaging, queuing, and Pub/Sub architectures
- Translate complex or ambiguous requirements into practical engineering solutions
- Balance rapid delivery with production-grade reliability and scalability
- Build comprehensive unit, integration, end-to-end, stress, and performance tests
- Collaborate with technical and business stakeholders throughout the development lifecycle
What we're looking for
- Approximately 6+ years of professional C++ engineering experience
- Genuine production experience building low-latency systems
- Strong expertise in C++17 or newer, with C++20 strongly preferred
- Excellent understanding of modern C++ fundamentals and performance characteristics
- Strong computer science fundamentals
- Deep understanding of algorithms, data structures, and complexity
- Experience designing high-performance or distributed systems
- Strong knowledge of networking and communication protocols
- Experience with latency optimization and performance tuning
- Production experience within traditional financial markets
- Background in a proprietary trading firm, market maker, hedge fund, investment bank, or comparable electronic-trading environment
- Strong communication and stakeholder-management skills
- Ability to operate independently in technically demanding environments
Particularly valuable experience
- Direct market-data engineering experience
- Feed-handler or ticker-plant development
- Electronic or automated trading systems
- Exchange connectivity
- FIX or ITCH protocols
- Order-book infrastructure
- Smart order routing
- Tick-to-trade optimization
- Lock-free programming
- Kernel-bypass networking
- Solarflare / Onload
- DPDK
- NUMA-aware architecture
- Cache-aware system design
- High-availability and failover systems
- Idempotency and ACID guarantees
Strongly preferred background
- Proprietary trading
- Market making
- High-frequency trading
- Systematic hedge funds
- Investment-bank electronic trading
- Production market-data infrastructure
- Performance-critical financial systems
This role may not be the right fit if you
- Do not have genuine production low-latency C++ experience
- Have primarily academic or research-based C++ experience without production systems ownership
- Have no professional exposure to trading or financial-market infrastructure
- Have low-latency experience primarily within cryptocurrency trading environments rather than traditional financial markets
- Prefer management responsibilities over hands-on engineering
- Are not comfortable joining through an initial 12-month contract
- Are currently based outside the United Kingdom, Netherlands, or France
- Require visa sponsorship to work from your country of residence
What you'll get
- Greenfield engineering ownership
- Exposure to highly sophisticated financial systems
- Challenging modern C++ development
- Complex low-latency and distributed-systems problems
- High-throughput financial market-data workloads
- End-to-end ownership from architecture to production
- Fully remote work across the UK, Netherlands, and France
- Potential transition into a permanent position after the initial contract
- Opportunity to work on technically demanding systems where engineering performance directly matters
If this sounds like a fit, we'd love to hear from you. Apply today!
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