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Senior Systems Engineer Greenfield, Ultra High Performance

External
eFinancialCareers logoEfinancialcareers · London, UK
Full-timeOn-site1mo ago30+ days old, may be filled
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About the role

Our client is a highly technical team building a greenfield, performance-critical systems platform from first principles. This is a senior-level role for engineers who have deep experience designing and optimising latency-sensitive, high-throughput production systems and enjoy operating close to the metal. The environment is fast-moving and adversarial , with a heavy emphasis on correctness, performance, and clear engineering thinking. Engineers are expected to take ownership of substantial parts of the system end-to-end. What you'll be working on: Designing and building ultra-high-performance systems where latency and throughput matter Optimising software with a strong understanding of hardware interaction Owning critical components across the full lifecycle: design, implementation, optimisation, and production Solving novel, non-obvious systems problems in a greenfield environment Working in a setting with real ambiguity and technical autonomy What they're looking for: 5+ years' experience building and optimising high-performance production systems Strong background in systems engineering, not general application development Experience with low-latency, high-throughput, or performance-critical software Proficiency in Rust, or strong C/C++ experience with willingness to switch Sharp problem-solving ability and comfort reasoning through complex, unstructured problems Backgrounds that tend to fit well: Engineers from top HFT, trading, or market-making firms Engineers from large-scale infrastructure teams at top technology companies PhDs or candidates with evidence of deep technical work (research, simulations, compilers, systems) Competitive programmers or engineers with substantial low-level side projects Why this role: Greenfield build with meaningful technical ownership Work on genuinely hard performance-driven systems problems Small, highly technical team with high engineering standards Higher upside: Base salary + guaranteed cash bonus + equity If you're driven by deep systems work, performance optimisation, and building critical infrastructure from scratch, this is a rare opportunity to do so.


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