Senior C++ Engineer - Trading

Advantage Resourcing UK Ltd; Greater London; On-site; GBP 70,000 - 110,000; Full time

Job summary

Advantage Resourcing UK Ltd is seeking a Senior C++ Engineer for a London-based trading platform. The role is a 6-month contract and requires onsite presence 3 days a week.

You will work on low-latency connectivity, high-performance algorithms, and reliability across global markets. The ideal candidate has extensive C++ experience in financial services, with knowledge of trading life cycles and distributed systems.

Qualifications

• Senior C++ software engineer in financial services with trading domain experience.
• Knowledge of exchange-traded derivatives and trading life cycle.
• Experience with low-latency connectivity and high-performance algorithms.
• Proficient in multithreaded, asynchronous, distributed systems.

Responsibilities

• Develop low-latency exchange connectivity using FIX, WebSockets, and HTTP.
• Build and enhance high-performance trading algorithms with traders.
• Optimize performance with kernel bypass, TLS, and connection tuning.
• Investigate production issues, improve reliability, fix bottlenecks.
• Maintain and extend automated testing frameworks.
• Support releases, deployments, and continuous improvement.

Skills

C++

Financial services exp

Multithreaded programming

Algorithms & data structures

Python

Communication skills

Tools

FIX protocol

WebSockets

HTTP

TLS optimization

Job description

Senior C++ Engineer - Trading

Certain Advantage is hiring for a Senior C++ Software Engineer based in London.

This role is on an initial 6-month contract basis and is required to be onsite 3 days a week.

The Company

We're working with a globally recognised organisation at the forefront of energy trading and technology. Backed by significant investment and operating at a global scale, the business develops cutting-edge trading platforms that support high-performance derivatives trading across international markets.

You’ll be responsible for:

• Developing low-latency exchange connectivity using native exchange APIs and protocols including FIX, WebSockets and HTTP.
• Building and enhancing high-performance trading algorithms alongside traders and quantitative analysts.
• Optimising application performance through techniques such as Kernel bypass, TLS optimisation and connection tuning.
• Investigating production issues, improving system reliability and resolving performance bottlenecks.
• Maintaining and extending automated testing frameworks to ensure software quality.
• Supporting releases, deployments and continuous improvements across the global trading platform.

The Individual

• C++ software development experience within financial services.
• Experience working in Trading & Capital Markets or Investment Banking
• Strong understanding of exchange-traded derivatives and the full trading life cycle.
• Knowledge of major global futures exchanges and their native protocols.
• Excellent understanding of multithreaded, asynchronous and distributed software development.
• Strong knowledge of algorithms, data structures and performance optimisation.
• Experience with Python, C#, SQL or other Scripting/programming languages.
• A track record of delivering reliable, production-grade applications and deployment best practices.
• Strong analytical, problem-solving and communication skills.
• The ability to thrive in a fast-paced trading environment with changing priorities.