Software Engineer

Job Opportunity: Senior C# Quantitative Developer | Capital Markets Technology

Location: London

Type: Full-time / Contract

Rate: £800 p/d (Outside IR35)

Client: Leading Global Investment Bank

Hybrid: 1 day per week in the office

Are you ready to be at the forefront of technology and finance? Our client, a top-tier investment bank, is looking for a Senior C# Quantitative Developer to join their high-impact Capital Markets Technology team in London.

This is a unique opportunity to bridge the worlds of quantitative analysis and software engineering—delivering cutting-edge solutions to drive pricing, risk management, and liquidity strategies in real-time trading environments.

About the Role

As a Senior Quantitative Developer, you'll collaborate closely with quantitative analysts, traders, and fellow technologists to develop and optimize core components of the bank's pricing and risk infrastructure. You'll be responsible for translating complex financial models into high-performance, production-ready systems—driving both innovation and stability in capital markets technology.

Key Responsibilities

1. Development & Optimization

• Implement decomposition logic for structured products including funding, fees, and charges.
• Integrate and refine pricing and risk models for real-time trading environments.
• Develop rules-based liquidity management for quoted underlyings.
• Enhance back testing, data analytics, and regression infrastructure.
• Build and maintain low-latency, high-throughput systems.

2. Cross-functional Collaboration

• Work side-by-side with quants and traders to productionize mathematical algorithms.
• Partner with infrastructure and DevOps teams to scale and deploy applications effectively.

3. System Monitoring & Support

• Ensure reliability and performance of live systems through proactive monitoring.
• Provide occasional on-call support to maintain system uptime and stability.

Qualifications

Required:

• Degree in Computer Science, Engineering, Mathematics, Physics, or similar.
• 10+ years of hands-on development experience in C# / .NET.
• Solid grasp of financial instruments (equities, derivatives, fixed income, FX, commodities).
• Proven experience building scalable, multi-threaded systems.
• Proficiency with SQL Server, MongoDB, and Git.
• Background in front-office environments within an investment bank, hedge fund, or fintech firm.

Preferred:

• MSc or PhD in a quantitative discipline.
• Experience with structured products, particularly structured notes.

What We're Looking For

• A critical thinker with outstanding analytical and problem-solving abilities.
• A team player who thrives in high-pressure, dynamic environments.
• Excellent communicator with a proactive, collaborative mindset.
• A self-starter who takes ownership and consistently drives results.

This is a highly visible role with significant impact, offering the chance to work on complex financial instruments and contribute directly to the bank's trading strategies and platform evolution. If you're passionate about finance and engineering and want to work alongside some of the best minds in the industry—we want to hear from you.

Apply now to learn more.