Senior C++​/Rust Engineer – Low-Latency eTrading

Requirements

Essential Requirements

The Opportunity

JUXT is partnering with a Tier 1 investment bank on a major Fixed Income eTrading platform, where new systems are being built from the ground up in Rust
.

• Pricing & Distribution – RFQ platform and electronic quoting
• Hedging & Algo – automated hedging and algorithmic trading

The programme is modernising a legacy C++ application and replacing it with a modern, low-latency Rust platform.

We are looking for a Senior C++ Engineer with genuine low-latency electronic trading experience to help design and build this next-generation platform.

The Role

This is a hands-on engineering position focused on building high-performance, low-latency trading infrastructure
.

You will bring strong C++ and electronic trading expertise while working with Rust to develop new capabilities across pricing, RFQ, quoting, hedging and algorithmic trading.

The role requires a deep understanding of what makes systems fast and predictable. You will be expected to apply principles such as mechanical sympathy, efficient memory layout, concurrency, lock-free techniques and disciplined performance measurement
.

This is not a role where latency is estimated or assumed — it is measured, profiled and continuously optimised.

Key Responsibilities

• Design and build new low-latency eTrading systems in Rust.
• Apply established C++ low-latency engineering principles to a modern Rust platform.
• Develop functionality across:
• RFQ and pricing
• Electronic quoting
• Hedging
• Algorithmic trading
• Design systems for predictable and consistent latency.
• Profile and measure system performance to identify optimisation opportunities.
• Apply low-level performance techniques around memory, concurrency and CPU efficiency.
• Develop reusable components that can be shared across the wider trading platform.
• Work closely with the bank's eTrading engineers, architects and trading stakeholders.
• Take ownership of technical problems from initial design through to production.
• Help replace and modernise functionality within the existing legacy C++ trading platform.

Essential Requirements

C++

• Strong commercial C++ engineering experience.
• Extensive experience building low-latency systems.
• Strong understanding of modern C++ and performance-focused development.
• Experience working with complex, production-grade systems.

Electronic Trading

• Proven experience developing electronic trading systems.
• Experience operating and supporting production trading platforms.
• Understanding of the performance, reliability and correctness requirements of trading technology.

Strong Knowledge Of Areas Including

• Mechanical sympathy
• Memory layout and allocation
• CPU/cache efficiency
• Concurrency
• Lock-free programming
• Performance profiling
• Latency measurement
• Performance optimisation

Rust

• Commercial Rust experience, or
• Strong enthusiasm and ability to learn Rust, backed by excellent C++ fundamentals.

Engineering Approach

• Able to take ownership of technical problems and drive them through to delivery.
• Comfortable designing solutions independently.
• Strong communication skills.
• Able to collaborate effectively with engineers, architects and trading stakeholders.
• Comfortable working in a technically demanding environment with a high degree of autonomy.

Desirable Experience

• Production Rust experience.
• Fixed Income or Rates trading experience.
• RFQ and electronic quoting workflows.
• Automated hedging.
• Algorithmic trading.
• Experience taking a greenfield trading system into production.
• Experience modernising or replacing a legacy low-latency C++ platform.

Languages

• C++
• Rust

• Mechanical sympathy
• Memory optimisation
• Lock-free techniques
• Concurrency
• Pro…