C++ Engineer — Rates & Credit Trading Systems

Citadel Securities; New York (NY); On-site; USD 200,000 - 280,000; Full time

Job summary

Citadel Securities seeks a Credit & Rates C++ Engineer to join our Fixed Income Technology team in London, working alongside Traders and Sales across European Government Bonds and EUR/GBP Rates, with ties to New York. This role focuses on production-grade C++ development and close business collaboration.

You will partner with Trading, Quant Research, and global Technology to design, build, and support high-performance trading, pricing, risk, and data systems powering our credit and rates

Qualifications

• Strong professional experience building production systems in C++, with C++ as the primary programming language in recent roles.
• Strong product knowledge or hands-on experience across rates, credit, fixed income, derivatives, or related trading products.
• Familiarity with products such as government bonds, corporate bonds, swaps, futures, CDS, credit indices, repo, inflation products, swaptions, or fixed income ETFs.
• Experience building trading, pricing, risk, analytics, market data, execution, or financial technology systems.
• Strong understanding of multi-threaded application design, distributed systems, data structures, algorithms, memory management, and system design.
• Ability to work directly with Traders, Sales, Quantitative Researchers, and Engineers in a fast-paced front-office environment.
• Highly adaptable with a proactive approach to leveraging AI tools to enhance productivity, decision-making, and innovation.

Responsibilities

• Build, maintain, and support high-performance trading and analytics systems primarily in modern C++.
• Develop systems supporting credit and rates products, including government bonds, corporate bonds, swaps, futures, CDS, credit indices, repo, inflation products, swaptions, and fixed income ETFs.
• Work closely with Traders and Sales across EGB, EUR/GBP IRS, and Credit desks to deliver front-office technology solutions.
• Partner with Quantitative Researchers and global Technology teams to turn trading requirements, research ideas, and models into production systems.
• Build tools and libraries for pricing, curve construction, spread analytics, risk, portfolio analytics, execution workflows, and P&L attribution.
• Develop high-performance, low-latency, multi-threaded applications in C++.
• Contribute to the architecture and design of distributed trading systems.
• Work with real-time market data, reference data, curves, ratings, index data, trade data, quote data, and execution data.
• Support electronic trading workflows including RFQ, dealer streams, venue connectivity, execution analytics, trade capture, and post-trade analysis.
• Analyze complex business and technical problems and implement scalable, maintainable solutions.
• Improve system performance, reliability, monitoring, and operational tooling.
• Provide timely production support for business-critical trading systems.
• Collaborate with teams across London, Paris, and New York.

Skills

C++

Multi-threaded

Front-office trading

Low-latency

Pricing

Distributed systems

Analytics

AI tooling

Job description

Citadel Securities seeks a Credit & Rates C++ Engineer to join our Fixed Income Technology team in London, working alongside Traders and Sales across European Government Bonds and EUR/GBP Rates, with ties to New York. This role focuses on production-grade C++ development and close business collaboration.

You will partner with Trading, Quant Research, and global Technology to design, build, and support high-performance trading, pricing, risk, and data systems powering our credit and rates