Senior C++ / Rust Engineer - Low Latency eTrading
JUXT·Senior·On-site · London, England, United Kingdom
Posted Oct 6, 2026·griddynamics.com
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.
The Platform Covers Two Core Electronic Trading Workflows
- 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.
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.
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.
Low-Latency Fundamentals
- 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.
Nice to have
- 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.
We offer
- Opportunity to work on bleeding-edge projects
- Work with a highly motivated and dedicated team
- Competitive salary
- Flexible schedule
- Benefits package - medical insurance, sports
- Corporate social events
- Professional development opportunities
- Well-equipped office
