Senior Software Engineer — C#/.NET : £150-180k

Hunter Bond; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

Hunter Bond in London seeks a Senior Software Engineer to join a technology-driven quantitative trading environment. You will own the design and development of high-performance C#/.NET systems and work alongside researchers and engineers to translate ideas into robust production software.

The role focuses on performance, scalability and data processing, with opportunities to influence architectural decisions and tooling. You will mentor peers and contribute to the team's technical direction.

Qualifications

• Significant commercial experience with C# and .NET in production services.
• Strong knowledge of concurrency, async programming and performance tuning.
• Experience building production-grade, data-heavy distributed systems.
• Ability to translate complex ideas with researchers/quant teams.

Responsibilities

• Designing and developing high-performance C#/.NET systems
• Building scalable applications and services used by quantitative and investment teams
• Mentoring less experienced engineers and shaping technical direction
• Improving engineering standards and tooling
• Contributing to architectural decisions

Skills

C# and .NET

High-performance systems

Distributed systems

Concurrency and async

Databases / data-heavy

Problem solving

Communication skills

Tools

SQL databases

Profiling tools

Git / Version control

Job description

A rare opportunity to join a highly successful quantitative investment fund as a Senior Software Engineer, working at the heart of a technology-driven trading environment.

Our client is a highly respected quantitative investment firm with a strong track record and a technology-first culture. They are now looking to hire an exceptional Senior Software Engineer with strong C#/.NET experience to join their growing engineering team in London.

This is a particularly interesting opportunity for an engineer who wants to move beyond traditional software development and work on complex, high-performance systems where technology has a direct impact on investment performance.

You’ll work alongside experienced software engineers, quantitative researchers and other technical specialists, solving challenging problems across performance, scalability, data and distributed systems.

As a Senior Software Engineer, you'll take ownership of the design and development of critical systems supporting the firm's quantitative investment strategies.

You’ll be involved across the full engineering lifecycle — from understanding the problem and shaping the architecture, through to implementation, optimisation and production.

Your responsibilities will include:

• Designing and developing high-performance C#/.NET systems
• Building scalable applications and services used by quantitative and investment teams
• Working closely with quantitative researchers to translate complex ideas into robust production software
• Designing systems capable of processing significant volumes of data
• Investigating and resolving complex performance and scalability challenges
• Applying modern software engineering principles to build highly reliable systems
• Contributing to architectural and technology decisions
• Improving engineering standards, development practices and tooling
• Mentoring less experienced engineers and helping shape the technical direction of the team

We're looking for a strong software engineer who enjoys working on technically demanding problems and has developed significant expertise in C# and .NET.

You'll ideally have:

• Extensive commercial experience with C# and .NET
• Strong understanding of modern C#, including concurrency, asynchronous programming and performance optimisation
• Excellent knowledge of algorithms, data structures and software design
• Experience designing and developing complex, production-grade systems
• Strong understanding of distributed systems and scalable architectures
• Experience working with databases and high-volume data
• A strong focus on code quality, testing and maintainability
• Experience diagnosing and optimising performance-critical applications
• Excellent problem-solving and communication skills

Experience within quantitative finance, trading, financial markets, low-latency systems or high-performance computing would be advantageous, although our client is also very interested in engineers coming from other technically demanding environments.

The technology

The core technology stack is C#/.NET, supported by a modern engineering environment.

Depending on your area of focus, you may work with technologies including: