C++ Exchange Developer

Huxley; City Of London; On-site; GBP 120,000 - 180,000; Full time

Benefits offered by this job

Competitive base salary

Bonus program

Employee Stock Purchase Plan

Pension up to 7%

Private medical insurance

Dental cover

GP service

Life assurance

Employee Assistance Programme

Parental leave

Flexible working

Lunch in office

Referral bonus

Tuition assistance

Professional development

Exposure to trading technology

Job summary

Huxley, a trading division of SThree, is seeking a Senior Software Engineer in London to design, develop and operate real-time, low-latency C++ systems powering European equities trading. You will work on order entry, matching engines and market data distribution.

Join a world-class team, own features end-to-end, mentor peers and contribute to critical trading infrastructure while operating in a high-performance, on-site role with exposure to the most advanced trading technology.

Qualifications

• Significant professional experience with Modern C++ (C++11/14/17/20)
• Strong understanding of performance optimisation and low-level system design
• Proven track record of delivering features from concept through production
• Experience mentoring or supporting fellow engineers
• Strong communication and stakeholder management skills
• Experience developing and supporting applications within Linux environments
• Proactive, ownership-driven mindset

Responsibilities

• Design, develop and operate low-latency C++ systems across five equities trading environments.
• Own features end-to-end from design through deployment and testing.
• Lead and mentor less experienced engineers and act as a technical expert.
• Investigate and resolve production issues to maintain reliability.
• Shape the team through interviews and engineering best practices.
• Collaborate with product, engineering and business stakeholders to deliver high-quality systems.

Skills

Modern C++

Performance optimisation

Low-level system design

Mentoring

Communication

Education

Computer Science degree

Tools

Linux

Job description

Leading Etrading client requires a senior C++ Engineer to Design, develop and enhance low-latency C++ applications across five equities trading environments, Contribute to critical components including order handling, matching engines and market data services. Take ownership from initial design through implementation, testing and deployment.

Are you passionate about building ultra-high-performance systems that operate at the heart of financial markets?

Join a world-class engineering team responsible for one of Europe's largest pan-European equities trading venues, where every microsecond matters and your work directly influences how billions of pounds are traded every day.

As a Senior Software Engineer, you'll play a key role in designing, developing and operating the technology that powers our real-time trading ecosystem. From order entry and matching engines to market data distribution and low-latency infrastructure, you'll help build mission-critical systems that are relied upon by some of the world's most sophisticated trading firms.

Why Join Us?

You’ll become part of a highly collaborative engineering team that works closely with business stakeholders across Europe and technology teams globally. We believe in empowering engineers with ownership, encouraging innovation, and giving everyone the opportunity to make a meaningful impact.

This is more than a development role. It's an opportunity to solve complex technical challenges, influence system design, mentor talented engineers, and shape the future of modern electronic trading.

Build High-Performance Trading Systems

• Design, develop and enhance low-latency C++ applications across five equities trading environments
• Deliver robust, scalable and production-ready solutions with a strong focus on quality and performance
• Contribute to critical components including order handling, matching engines and market data services

Own Features End-to-End

• Take ownership from initial design through implementation, testing and deployment
• Collaborate closely with engineers, product teams and business stakeholders
• Drive technical decisions and ensure successful delivery of complex initiatives

Lead and Mentor

• Support and develop less experienced engineers
• Act as a technical expert for key systems and services
• Contribute to technical discussions, architecture reviews and engineering best practices

Support a Mission-Critical Platform

• Investigate and resolve complex production issues
• Help maintain the reliability and availability of trading systems
• Participate in an on-call support rota when required

Shape the Future Team

• Interview and evaluate engineering candidates
• Help build an exceptional technology organisation

What We’re Looking For

Essential Skills & Experience

• Significant professional experience with Modern C++ (C+ or later)
• Strong understanding of performance optimisation and low-level system design
• Proven track record of delivering features from concept through production
• Experience mentoring or supporting fellow engineers
• Strong communication and stakeholder management skills
• Experience developing and supporting applications within Linux environments
• A proactive, ownership-driven mindset

Desirable Experience

• C+
• Python development
• SQL and relational databases
• Real-time or low-latency systems
• Trading, financial markets or exchange technology
• Computer Science, Software Engineering or related degree

What We Offer

We believe exceptional people deserve exceptional support. That's why we provide a comprehensive package focused on your professional growth, financial wellbeing and personal health.

Financial Rewards

• Competitive base salary
• Performance-based bonus opportunity
• Employee Stock Purchase Plan
• Pension contributions of up to 7% of salary with no employee contribution required

Health & Wellbeing

• Private medical insurance for you and your family, including dental cover
• Company-funded private GP service
• Life assurance and long-term illness cover
• Employee Assistance Programme for you and your immediate family

Family Support

• Enhanced parental and adoption leave
• Flexible and supportive working environment

Lifestyle Benefits

• ClassPass Corporate Membership
• Complimentary lunch, snacks and refreshments in the office
• Employee referral bonus scheme
• Volunteer opportunities and charitable giving match programme

Learning & Development

• Paid tuition assistance
• Ongoing professional development opportunities
• Exposure to some of the most advanced trading technology in the industry

Huxley, a trading division of SThree Partnership LLP is acting as an Employment Business in relation to this vacancy Registered office 8 Bishopsgate, London, EC2N 4BQ, United Kingdom Partnership Number OC(phone number removed) England and Wales