Fx Trading Systems Developer Jobs (NOW HIRING)

SEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners committed to delivering the services our customers expect. With deep expertise and a global footprint across financial markets, we enable businesses and economies worldwide to fund innovation, manage risk, and create jobs. For over 300 years, we've supported financial stability and growth across global communities.
We are looking for a hands-on Tech Lead (Java) to drive the design, development, and delivery of large-scale, low-latency trading platforms within our FX engineering group. This role combines deep technical contribution with technical leadership, guiding engineers and shaping the architecture and direction of critical trading systems.
You will remain close to the code while also leading projects end-to-end-partnering with architects, influencing engineering standards, and mentoring team members to deliver high-performance, highly reliable solutions.
We value strong technical expertise, ownership, innovation, and a collaborative mindset.
Key Responsibilities

• Lead the design and development of low-latency trading systems, while remaining an active, hands-on contributor to the codebase
• Own and drive technical delivery of projects, from design through implementation, testing, and production rollout
• Provide technical leadership and mentorship to engineers, fostering best practices in coding, performance, and system design
• Partner closely with architects, product teams, and other engineering groups to define and deliver scalable solutions for FX trading
• Contribute to and guide the evolution of system architecture, ensuring performance, scalability, and resilience
• Design, build, and support high-performance trading venues and services
• Lead efforts to improve system observability, reliability, and operational excellence
• Develop automation to detect, prevent, and resolve production issues, minimizing latency and downtime
• Drive continuous improvements across performance optimization, cost efficiency, security, and developer experience
• Champion agile and DevOps practices, promoting CI/CD, automated testing, and infrastructure as code

Required Skills & Experience

• Strong hands-on expertise in Java development, with a passion for writing clean, efficient, production-grade code
• Proven experience operating as a technical lead or senior engineer influencing design and delivery
• Deep understanding of data structures, algorithms, and system design principles
• Expertise in concurrency, multithreading, and performance optimization
• Strong knowledge of low-latency system design and memory management
• Experience with profiling, benchmarking, and performance tuning tools
• Familiarity with network protocols (TCP, UDP, HTTP) and techniques for optimizing network communication
• Proven track record of owning and delivering complex, business-critical systems
• Experience working in agile environments with modern engineering practices
• Exposure to DevOps practices, including automation of testing, deployment, and infrastructure
• Strong problem-solving skills with the ability to investigate and resolve complex, cross-system issues
• Ability to work effectively in a globally distributed team, balancing leadership and hands-on delivery

Desired Skills

• Experience with cloud platforms and cloud-native architecture
• Knowledge of SQL and NoSQL databases
• Experience mentoring or leading engineers in a technical capacity
• Strong passion for technology and continuous learning
• Excellent communication and stakeholder management skills

Career Stage:
Manager
Compensation/Benefits Information:
LSEG is committed to offering competitive Compensation and Benefits. The anticipated base salary for this position is $147,500 - $245,900.
Please be aware base salary ranges may vary by geographic location, city and state. In addition to our offered base salary, this role is eligible for our Annual Incentive Plan (AIP/"bonus plan"). Target AIP rates will be commensurate with role level and posted career stage. Individual salary will be reflective of job related knowledge, skills and equivalent experience. LSEG roles (excluding internships and part-time roles of less than 20 hours per week) are typically eligible for inclusion in our LSEG Benefits program, which includes offerings of: Annual Wellness Allowance, Paid time-off, Medical, Dental, Vision, Flex Spending & Health Savings Options, Prescription Drug plan, 401(K) Savings Plan and Company match. LSEG's Benefits plan also includes basic life insurance, disability benefits, emergency backup dependent care, adoption assistance commuter assistance etc.
London Stock Exchange Group (LSEG) Information:
Join us and be part of a team that values innovation, quality, and continuous improvement. If you're ready to take your career to the next level and make a significant impact, we'd love to hear from you.
LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.
Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.
Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.
We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone's race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs.
You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.
LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.
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