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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!

Senior C++ Low-Latency Developer

Senior C++ Low-Latency Developer

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