Platform Engineer - Low-Latency Trading Infrastructure (Java/Linux) - London

Job Description
Join our team as a Platform Engineer, maintaining and evolving our global low-latency trading infrastructure in London, focusing on reliability, observability, and performance.
We are hiring a Platform Engineer to help maintain and evolve our global low-latency trading infrastructure. This is a London-based engineering role, focused on the reliability, observability, and performance of a mature FX and macro trading platform. You will work with a well-established Java codebase on Linux, supporting real-time systems used by a large global client base. This is not a Greenfield or quant role - we're looking for someone passionate about robust systems, diagnostics, and platform engineering, not someone whose primary focus is trading strategies. Our platform is recognized as one of the largest FX trading systems globally.
What You'll Do

• Enhance and support low-latency Java services running on Red Hat Linux.
• Operate and extend our UDP multicast infrastructure, primarily Informatica LBM.
• Support and evolve FIX protocol connectivity for client and venue interfaces.
• Lead efforts around monitoring, alerting, and production stability.
• Work with tools including Geneos, Splunk, and Grafana to ensure observability.
• Collaborate with global engineering and support teams to drive operational excellence.
• Contribute to technical decision-making around reliability, performance, and incident response.

What We're Looking For

• Proven experience in Java (17/21+) development with a strong understanding of performance tuning and concurrency.
• Deep familiarity with Linux systems engineering, particularly Red Hat.
• Hands-on experience with multicast messaging (ideally LBM, or equivalents like Aeron or Tibco).
• Strong platform mindset: you think about uptime, metrics, logs, alerts, capacity, and supportability.
• Familiarity with monitoring and observability tools such as Geneos, Splunk, Grafana.
• Comfortable working on production-critical, high-uptime systems in a regulated environment.
• Scripting experience with languages such as Python or Perl.

Nice to Have

• Knowledge of FIX protocol and its role in electronic trading.
• Experience in a low-latency trading or market data environment.
• Scripting (Bash, Python) or config automation (Ansible, etc.).
• Familiarity with messaging patterns, network tuning, or CPU/memory profiling.
• Experience with in-memory databases like kdb for analytical work and setting up dashboards around low latency flow.

What We Offer

• A central role in building a mission-critical platform with global impact.
• Exposure to real-time systems, multicast networks, and production observability at scale.
• A collaborative, global engineering environment with real ownership.
• Competitive compensation and benefits package.

About Us
J.P. Morgan is a global leader in financial services, providing strategic advice and products to the world's most prominent corporations, governments, wealthy individuals and institutional investors. Our first-class business in a first-class way approach to serving clients drives everything we do. We strive to build trusted, long-term partnerships to help our clients achieve their business objectives.
We recognize that our people are our strength and the diverse talents they bring to our global workforce are directly linked to our success. We are an equal opportunity employer and place a high value on diversity and inclusion at our company. We do not discriminate on the basis of any protected attribute, including race, religion, color, national origin, gender, sexual orientation, gender identity, gender expression, age, marital or veteran status, pregnancy or disability, or any other basis protected under applicable law. We also make reasonable accommodations for applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs. Visit our FAQs for more information about requesting an accommodation.
About the Team
J.P. Morgan's Commercial & Investment Bank is a global leader across banking, markets, securities services and payments. Corporations, governments and institutions throughout the world entrust us with their business in more than 100 countries. The Commercial & Investment Bank provides strategic advice, raises capital, manages risk and extends liquidity in markets around the world.