Java developer in FX risk

Citi; Greater London; Hybrid; GBP 120,000 - 170,000; Full time

Benefits offered by this job

Base salary

27 days annual leave

Annual discretionary bonus

Private medical care & life insurance

Employee assistance program

Pension plan

Parental leave

Employee discounts

Learning and development resources

Job summary

Citi in London is seeking an experienced Java engineer to own end-to-end delivery of high-performance FX risk management applications. You will design scalable, low-latency systems, setting engineering standards and serving as a technical reference for the team.

In an agile environment, you will translate complex requirements into robust code, collaborate with quants and traders, and leverage AI-assisted tools to accelerate delivery while maintaining security and quality.

Qualifications

• Proven hands-on Java development with focus on Core Java and multithreading in high-load systems.
• Strong understanding of JVM performance optimization, memory profiling, and GC tuning.
• Experience with distributed systems and in-memory computing concepts.
• Production experience with Apache Ignite; strong MongoDB and Oracle SQL skills.
• Experience with messaging technologies like Kafka and Solace; Linux scripting; cloud deployments.
• Great emphasis on TDD and release practices; readiness for L3 production support.

Responsibilities

• Lead end-to-end delivery of complex, high-performance Java applications supporting FX risk management.
• Architect scalable, low-latency solutions processing real-time risk data at scale.
• Drive technical direction and engineering standards across the team.
• Translate business requirements into robust, high-quality code with cross-functional partners.
• Contribute to Citi's tech strategy and improve risk technology at a global scale.

Skills

Core Java

Multithreading

JVM performance

Distributed systems

Kafka

Solace

Apache Ignite

MongoDB

Oracle SQL

Linux

Scripting

AWS/Azure

TDD

Release practices

Tools

Apache Ignite

MongoDB

Oracle SQL

Kafka

Solace

Linux

Cloud platforms (AWS/Azure)

Job description

Описание

Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter.

Задачи

• Lead end-to-end delivery of complex, high-performance Java applications supporting FX risk management across global markets
• Architect scalable, low-latency solutions that process real-time risk data at scale — designing for resilience, performance, and security from day one
• Drive technical direction and key decisions — from system design and architectural choices to setting engineering standards across the team
• Translate complex business requirements into robust, high-quality code — working closely with quantitative analysts, traders, and business stakeholders
• Craft high-quality, scalable software in an agile environment, leveraging AI-powered coding tools to accelerate delivery without compromising standards
• Share expertise and raise the bar — act as a technical reference point for the team, influencing engineering quality through example, guidance, and knowledge sharing (this is an individual contributor role with no direct reports)
• Champion innovation — actively evaluate, propose, and adopt new technologies and frameworks; this team has the mandate and appetite to bring in better tools
• Own quality — participate in mandatory cross-team code reviews, supported by Citi Squad AI reviewers and peer engineers, ensuring adherence to security, quality, and compliance standards
• Operate in production — take ownership of L3 production support issues, provide timely resolutions, and deliver long-term remediation fixes that address root causes — not just symptoms
• Support testing cycles and post-production deployment — from writing TDD-first code to validating releases in a weekly cadence
• Contribute to Citi's technology strategy, influencing how the firm approaches risk technology at a global scale

Требования

• Proven hands-on Java development experience with strong focus on Core Java and multithreading in high-load, high-throughput systems
• Deep understanding of JVM performance optimisation — memory profiling, GC tuning, and squeezing performance where it counts
• Solid grasp of distributed systems architecture and in-memory computing concepts
• Proven production experience with Apache Ignite — you've used it at scale, not just evaluated it
• Strong MongoDB skills — CRUD operations, indexing strategies, and performance tuning in production environments
• Deep SQL knowledge and query optimisation in Oracle — you know how to make queries fast and keep them that way
• Solid experience with messaging technologies — Apache Kafka and/or Solace
• Proficiency in Linux environments and scripting — comfortable on the command line and automating where it matters
• Experience deploying and maintaining applications on cloud platforms (AWS, Azure, or similar)
• A genuine passion for Test-Driven Development (TDD) — you write tests first and mean it
• Readiness to engage in L3 production support and own release activities end-to-end
• Будет плюсом: Experience in financial services technology, particularly in risk, trading, or capital markets; Familiarity with FX products — spot, forwards, options, or derivatives; Understanding of real-time risk calculation systems or market data platforms; Exposure to low-latency, high-throughput distributed systems

Условия

• business casual workplace with a hybrid working model (up to 2 days working at home per week)
• competitive base salary (which is annually reviewed)
• 27 days annual leave (plus bank holidays)
• A discretional annual performance related bonus
• Private Medical Care & Life Insurance
• Employee Assistance Program
• Pension Plan
• Paid Parental Leave
• Special discounts for employees, family, and friends
• Access to an array of learning and development resources