C++ Trading Platform Developer

Westren Capital; Greater London; Hybrid; GBP 160,000 - 200,000; Full time

Job summary

Westren Capital, a London-based proprietary trading firm, seeks a C++ Trading Platform Developer to build and maintain core platform components. You will work on order management, market data handling, and position tracking in a high-velocity trading environment.

Join a collaboration-driven team where researchers, engineers, and traders align to extract durable signals from data and translate them into scalable, risk-aware strategies.

Qualifications

• Strong C++ skills applicable to high-throughput systems.
• Experience building low-latency trading components.
• Willingness to debug and optimize production systems.

Responsibilities

• Build and maintain core components of the trading platform, including order management, market data handling, and position tracking.
• Write high-performance, low-latency C++ code that sits in the path between a decision and an executed trade.
• Collaborate with traders and quants to translate requirements into working systems.
• Debug and resolve production issues on live trading systems with immediate impact.
• Improve platform reliability, observability, and performance over time.
• Contribute to architectural decisions as the platform scales across venues and strategies.

Skills

C++ proficiency

Low-latency design

Performance optimization

Linux systems programming

Concurrency

Python scripting

Job description

EngineeringFull-timeOn-site London# C++ Trading Platform DeveloperAnnual base salary: £160,000 - £200,000 GBP1. |2. |3. C++ Trading Platform Developer## Role overviewWestren Capital is a London-based proprietary trading firm specialising in digital asset markets. This role sits within our Trading Technology team, building the platform our trading desks depend on every day.Our work sits at the intersection of statistical modelling, market microstructure, and engineering. The aim is straightforward, if not easy: extract durable signals from noisy data and convert them into scalable, risk-aware strategies. That requires intellectual honesty, a tolerance for ambiguity, and a willingness to discard ideas that do not survive contact with reality.We operate in small, highly collaborative teams where research, engineering, and trading are tightly coupled. Outcomes matter, not narratives. Compensation and progression reflect that directly.## Responsibilities* - Build and maintain core components of the trading platform, including order management, market data handling, and position tracking* - Write high-performance, low-latency C++ code that sits directly in the path between a decision and an executed trade* - Work closely with traders and quants to understand what the platform actually needs to do, not what it was originally spec'd to do* - Debug and resolve production issues on live trading systems, where downtime has an immediate, measurable cost* - Improve platform reliability, observability, and performance on an ongoing basis, not just when something breaks* - Contribute to architectural decisions as the platform scales across more venues, asset types, and strategies## Requirements* - Strong C++ skills, with real experience building low-latency or high-throughput systems, ideally in a trading or financial context* - Solid understanding of Linux systems programming, concurrency, and network programming* - Experience with market data handling, order management systems, or exchange connectivity is a strong advantage* - Comfortable working directly with traders and researchers, translating fuzzy requirements into precise, working systems* - Methodical debugging skills; you find the actual cause of a problem, not just a plausible one* - Python proficiency for tooling, testing, and scripting alongside core C++ work