Our client are a London‑based, engineering‑led technology company building ultra‑high‑performance infrastructure for decentralised financial networks. Their systems operate at extreme scale and low latency, supporting sophisticated trading and financial activity while preserving decentralisation. The company is venture‑backed, profitable, and focused on solving hard, real‑world performance problems where engineering decisions directly impact outcomes. You'd own systems end-to-end, from design through deployment through iteration. The code you write can be shipped within the hour and will directly affect market share and P&L. Rust is their primary language. They are open to strong C/C++/etc. Optimise performance‑critical code paths where microsecond‑level improvements compound across millions of executions. Analyse competitor behaviour and system dynamics, turning insights into engineering or strategic improvements with direct commercial impact. Own systems end‑to‑end: design, implementation, deployment, monitoring, and iteration, with rapid feedback loops. Strong systems programming experience in Rust (or C++ with willingness to switch). Deep understanding of concurrency, including lock‑free data structures, synchronisation primitives, and multi‑core data flow. Proven ability to profile and optimise software, with strong knowledge of how code interacts with hardware (CPU caches, memory layout, branch prediction, compiler behaviour). Familiarity with blockchain systems or virtual machine execution environments. Experience with high‑performance networking or kernel‑level optimisations. Exposure to auction systems, game theory, or adversarial market design. Base + Cash Bonus + Equity
Systems Engineer (Monitoring) in London employer: Selby Jennings
Selby Jennings is an exceptional employer, offering a dynamic work culture that fosters collaboration and innovation in the heart of London. Employees benefit from extensive growth opportunities, competitive compensation, and a supportive environment that encourages professional development, making it an ideal place for those looking to make a meaningful impact in the finance technology sector.
