Lead Trading Engineer - Greenfield - Systematic - Quantitative Fund - London - WFH - Up to £550k TC
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Lead Trading Engineer - Greenfield - Systematic - Quantitative Fund - London - WFH - Up to £550k TC
My client is a quantitative fund operating at the very top of global markets, where engineering is a first-class discipline, the infrastructure is world-class, and the standard for what good looks like is set by the people already in the building. This is not a bank with a technology team. It is a technology firm that trades.
The Opportunity
The execution front-end platform is being built from scratch. No legacy codebase. No inherited architecture. No design-by-committee. The team is building the real-time cockpit that the trading desk will rely on, the system through which execution decisions are made, monitored, and controlled in live markets. This is a London-based role, working alongside a team in the US. The timezone gap is real, and the firm is honest about it. What it creates in practice is something most engineers spend years trying to find: genuine end-to-end ownership, the latitude to make architectural decisions, and a direct line between what you build and what the desk uses. Senior engineers who thrive in that environment find it hard to go back.
What You Will Build
The platform is the desk’s live window into everything that matters during execution — order flow, venue performance, anomalies, and overall operational state. The engineering challenges are as compelling as the domain itself.
At its core, you’ll be building real-time monitoring systems that track the full order lifecycle: venue and router performance, slippage, rejects, and anomalies. These systems need to surface the right information at exactly the right moment, and do so quickly enough to be genuinely useful under pressure.
Alongside this sits the control plane: workflows, guardrails, audit trails, permissions, and safe-to-trade checks. This is the layer the desk relies on when something goes wrong, so it has to be robust, predictable, and trustworthy.
A central challenge is state management and reconciliation, answering the deceptively simple question at the heart of any live trading system: what is actually true right now? Not what was true a second ago, and not what should be true, but what is true. Designing systems that can answer that question consistently, under load and in production, is one of the more intellectually demanding problems in financial engineering.
You’ll also build desk-facing UI that is fast, intuitive, and designed for people making high-stakes decisions in real time. In this environment, a slow render or an ambiguous data state isn’t just inconvenient, it has consequences.
The Technical Bar
True full-stack engineers, those who can own both a React frontend and a C# backend to the same standard, are rare, and the interview process reflects that. Frontend and backend are assessed separately, with the backend stage in particular set by engineers operating at an exceptionally high bar.
On the frontend, the expectation is for UI that performs under real conditions: low-latency rendering, clear and intuitive interaction design, and components built for a trading environment where speed and clarity are non-negotiable. Experience with trading interfaces, execution monitoring, order management, or real-time data systems is a strong signal.
On the backend, C# is the core language. The focus is on production-grade systems: distributed architectures, event-driven design, concurrency, async patterns, and performance under sustained throughput. The emphasis is on systems that hold up in production when it matters, not prototypes that look good in isolation.
Strong engineers from adjacent stacks are considered, for example, Java developers willing to move to C#, or Angular developers open to React. That said, the backend interview is where most candidates fall short, and the firm is upfront about that to save time on both sides.
The Profile
Senior engineers are preferred, and the reasons are clear. Operating with autonomy, often in collaboration with teams several time zones away requires sound engineering judgment that typically comes with experience. You’ll be expected to set direction, make architectural decisions, and deliver without the safety net of constant oversight.
For the right person, that level of ownership isn’t a risk; it’s the appeal.
Exceptional mid-level candidates are considered where technical quality stands out. Sponsorship is available within eligible geographies.