Fixed Income Senior Algo Developer

Citigroup Inc.; City of Westminster; On-site; GBP 180,000 - 240,000; Full time

Job summary

Citigroup Inc. is seeking a Senior Vice President lead engineer for its Fixed Income Technology team. You will architect and implement a next-generation, cross-asset Algo platform including pricing, hedging and execution systems.

The role combines deep Java and Rust expertise with leadership, mentoring, and hands-on coding to push performance and reliability. You will drive long-term technology strategy, optimize ultra-low latency workflows, and partner with front-office traders, quants and

Qualifications

• Extensive experience in front-office low-latency Algo trading.
• Strong architecture and design skills for high-performance systems.
• Hands-on coding in Java and Rust with leadership responsibilities.

Responsibilities

• Lead architectural design and development of a cross-asset Algo platform for pricing, hedging and execution.
• Mentor and coach engineers, driving technical excellence and best practices.
• Collaborate with traders, quants and product managers to translate requirements into robust solutions.
• Optimize ultra-low latency trading workflows across hardware, OS and network.

Skills

Java

Rust

Low-latency coding

Architecture design

Mentorship

Front-office collaboration

Performance tuning

High-performance messaging

Git

Jenkins

Communication

Education

Bachelor's or Master's in CS/Engineering

Tools

Git

Jenkins

Docker/OpenShift

Aeron

DPDK

Solace

Job description

We are seeking a highly skilled and experienced lead engineer to join our Fixed Income Technology team, specializing in low-latency Algo trading . As a Senior Vice President, you will be a key technical leader responsible for the architecture, design, and implementation of our next-generation cross-asset Algo platform including pricing, hedging and execution systems . This is a hands-on role that combines deep technical expertise in Java and Rust with leadership and a strategic mindset. You will lead complex, business-critical projects, mentor talented engineers, and drive the adoption of modern technologies and best practices in high-performance computing.

• Technical Leadership: Lead the architectural design and development of high-performance, low-latency Algo platform including pricing, hedging and execution systems for Fixed Income products.
• Hands-On Development: Engage in active, hands-on coding in Java and Rust, contributing to the core codebase and setting standard for quality, performance, and reliability.
• System Architecture: Define and drive the long-term technology vision for the order management platform, ensuring it is scalable, resilient, and aligned with business goals.
• Low-Latency Optimization: Design, implement, and optimize trading workflows for ultra-low latency, ensuring minimal processing time from order receipt to execution, including tuning of the underlying hardware, operating system and network stack.
• Stakeholder Collaboration: Partner closely with front-office traders, quants, and product managers to understand business requirements and translate them into robust technical solutions.
• Mentorship & Guidance: Mentor and coach junior and mid-level engineers, fostering a culture of technical excellence, innovation, and continuous learning.
• Production Support: Act as a senior escalation point for resolving complex production issues, ensuring the stability and integrity of the trading platform.
  Experience: Extensive professional software development experience, with a significant portion in a front-office role focused on low-latency Algo trading .
• Domain Knowledge: Deep understanding of Fixed Income products across both Rates (e.g., government bonds, interest rate futures, swaps and other rates derivatives) and Credit (e.g., investment grade and high yield corporate bonds, CDS single names, CDX/iTraxx indices, credit ETFs and portfolio trading), including their pricing, risk sensitivities and hedging relationships, together with electronic trading concepts, market data, and the trade lifecycle is essential.
• Market Microstructure (good to have): Working knowledge of market microstructure across the Fixed Income venues used for hedging, such as CME, Eurex, ICE, MTS, BrokerTec (BTEC) and FMX, including order book dynamics, matching engine behavior, order types, and venue-specific protocols and latency characteristics.
• Technical Expertise:
• Expert-level proficiency in Java and Rust , with a strong emphasis on performance-critical, low-latency programming.
• Quant Containers : Proven experience in the design, development, and maintenance of Fixed Income quant pricing containers is essential.
• Demonstrable expertise in building and optimizing low-latency pricing, hedging and execution systems
• Solid hands-on experience in integrating with and managing vendor connectivity (e.g., Redline, ION)
• Strong knowledge and practical experience in designing and implementing robust pricing, hedging and execution systems for ultra-low-latency environments
• High-Performance Messaging: Strong knowledge of high-performance messaging middleware (e.g., Aeron, Solace) and low-latency data handling techniques.
• Low-Level Performance Tuning: Hands-on experience tuning hardware, OS and network stack for low-latency infrastructure, including CPU isolation and thread pinning, NUMA-aware memory layout, kernel-bypass networking (e.g., Solarflare/Onload, DPDK), interrupt affinity, huge pages, and JVM/GC tuning for predictable tail latency.
• Proven experience designing and building complex, distributed, and fault-tolerant systems.
• Experience with modern development tools, including Git, Jenkins, and containerization technologies (e.g., Docker, OpenShift).
• Leadership: Demonstrable experience leading software projects, mentoring engineers, and making key architectural decisions.
• Problem Solving: Exceptional analytical and problem-solving skills, with the ability to tackle complex challenges under pressure.
• Communication: Excellent communication and interpersonal skills, with the ability to articulate complex technical concepts to both technical and non-technical audiences.

Education:

Bachelor's or Master's degree in Computer Science, Engineering, Mathematics, or a related field.

The Fixed Income Technology group is a global team responsible for the design, development, and support of the trading and risk management systems used by the Fixed Income business. Our platforms are a critical part of Citi's markets infrastructure, processing millions of trades and calculating risk for a multi-billion-dollar portfolio. We are a fast-paced, results-oriented team that values innovation, collaboration, and technical excellence. We work in close partnership with traders, quants, and other business stakeholders to deliver cutting-edge solutions that drive business growth.