Senior C++ Software Engineer - Test Frameworks (Low Latency Trading)

• London, United Kingdom (Hybrid/Flexible)
• 12-Month Contract
• £650 - £800 per day (Inside IR35)

Templeton & Partners are urgently seeking a Senior C++ Software Engineer specialising in automated test framework development to join a high-performing engineering team working on a latency-sensitive algorithmic trading platform.

This is a fantastic opportunity to contribute to the evolution of a sophisticated testing ecosystem that underpins mission-critical trading systems across global markets.

Role Overview

As a senior engineer, you will play a key role in designing and enhancing a robust automated testing framework used across complex C++ services. Your work will help ensure deterministic system behaviour, improve developer feedback loops, and elevate overall software quality.

You will operate with a high degree of autonomy, contributing both as a hands-on engineer and as a technical advisor across testing strategy and engineering best practices.

Key Responsibilities

• Design, build, and extend automated testing frameworks for C++ services in low-latency environments
• Develop reusable test harnesses, fixtures, mocks, and utilities to isolate business logic
• Enable deterministic and reliable testing of asynchronous and distributed systems
• Integrate automated tests into CI/CD pipelines for fast, actionable feedback
• Convert production defects and incidents into robust regression test suites
• Support engineering teams with test strategy, tooling, and quality practices

Technical Environment

• Modern C++ and Python
• GoogleTest/GoogleMock/Catch2
• CI/CD pipelines (Jenkins, GitLab CI, etc.)
• Distributed, event-driven, low-latency systems
• Integration and end-to-end testing environments

Required Skills & Experience

• Strong experience in C++ software engineering within complex systems
• Proven track record building or extending automated test frameworks
• Hands-on expertise with unit testing frameworks (GoogleTest, GoogleMock, Catch2)
• Solid understanding of concurrency and asynchronous programming, and deterministic testing
• Experience with mocking, dependency injection, and test isolation techniques
• Experience integrating automated testing into CI/CD pipelines

Industry Knowledge (Essential)

• Understanding of major global futures exchanges and protocols (eg FIX, binary feeds)
• Strong grasp of the derivatives trading life cycle (market data - order routing - execution)

Nice to Have

• Experience with low-latency or algorithmic trading systems
• Exposure to deterministic replay or simulation environments
• Familiarity with test orchestration frameworks (eg Testplan)
• Understanding of observability (structured logging, tracing, metrics)

Ways of Working

• Collaborative, pragmatic, and delivery-focused
• Strong emphasis on automation, reproducibility, and test reliability
• Ability to work closely with engineers, quants, and platform teams

Why Apply?

• Work on cutting-edge, low-latency trading platforms
• Influence testing strategy and engineering quality at scale
• Join a high-performing, collaborative team
• Immediate start - urgent hiring process

Apply now for immediate consideration