Senior C++ Low-Latency Developer

Hiring via TechTree This is a role that TechTree is recruiting for on behalf of one of its clients. TechTree is an AI-driven recruitment platform working with high-growth companies. When you apply, TechTree's AI Agent matches you not just to this role, but to other relevant opportunities across its network, so one application can unlock multiple roles. Senior C++ Low-Latency Developer | UK, Netherlands or France|Remote Locations: United Kingdom, Netherlands, or FranceWork model: Fully remoteEmployment: 12-month contractCompensation: £200,000 - £300,000Conversion: Opportunity to convert to permanent by mutual agreementLevel: Senior Individual ContributorWork 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 infrastructureWork on greenfield systems processing high-throughput financial market dataDesign and develop performance-critical software using modern C++Own technical delivery from architecture through testing and production deploymentSolve complex latency, networking, concurrency, and distributed-systems challengesWork 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 dataDevelop performance-critical components using modern C++Own architecture, implementation, testing, optimization, and deploymentBuild systems supporting high-throughput and latency-sensitive workloadsOptimize application performance across CPU, memory, networking, and concurrencyWork with TCP, UDP, multicast, messaging, queuing, and Pub/Sub architecturesTranslate complex or ambiguous requirements into practical engineering solutionsBalance rapid delivery with production-grade reliability and scalabilityBuild comprehensive unit, integration, end-to-end, stress, and performance testsCollaborate with technical and business stakeholders throughout the development lifecycle What We're Looking For Approximately 6+ years of professional C++ engineering experienceGenuine production experience building low-latency systemsStrong expertise in C++17 or newer, with C++20 strongly preferredExcellent understanding of modern C++ fundamentals and performance characteristicsStrong computer science fundamentalsDeep understanding of algorithms, data structures, and complexityExperience designing high-performance or distributed systemsStrong knowledge of networking and communication protocolsExperience with latency optimization and performance tuningProduction experience within traditional financial marketsBackground in a proprietary trading firm, market maker, hedge fund, investment bank, or comparable electronic-trading environmentStrong communication and stakeholder-management skillsAbility to operate independently in technically demanding environments Particularly Valuable Experience Direct market-data engineering experienceFeed-handler or ticker-plant developmentElectronic or automated trading systemsExchange connectivityFIX or ITCH protocolsOrder-book infrastructureSmart order routingTick-to-trade optimizationLock-free programmingKernel-bypass networkingSolarflare / OnloadDPDKNUMA-aware architectureCache-aware system designHigh-availability and failover systemsIdempotency and ACID guarantees Strongly Preferred Background Proprietary tradingMarket makingHigh-frequency tradingSystematic hedge fundsInvestment-bank electronic tradingProduction market-data infrastructurePerformance-critical financial systems This role may not be the right fit if you Do not have genuine production low-latency C++ experienceHave primarily academic or research-based C++ experience without production systems ownershipHave no professional exposure to trading or financial-market infrastructureHave low-latency experience primarily within cryptocurrency trading environments rather than traditional financial marketsPrefer management responsibilities over hands-on engineeringAre not comfortable joining through an initial 12-month contractAre currently based outside the United Kingdom, Netherlands, or FranceRequire visa sponsorship to work from your country of residence What You'll Get Greenfield engineering ownershipExposure to highly sophisticated financial systemsChallenging modern C++ developmentComplex low-latency and distributed-systems problemsHigh-throughput financial market-data workloadsEnd-to-end ownership from architecture to productionFully remote work across the UK, Netherlands, and FrancePotential transition into a permanent position after the initial contractOpportunity 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!