Post Trade Engineer Java - London

Selby Jennings; City Of London; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

Selby Jennings in London and New York is seeking a Software Engineer to design and scale platforms that support the complete trade lifecycle across multiple asset classes and international markets.

This role involves solving complex engineering challenges at scale for trade matching, clearing, settlement and reconciliation, and contributing to post-trade data platforms, analytics, and AI-driven initiatives.

Qualifications

• Experience with Java and/or Python in production environments.
• Strong understanding of distributed systems and modern software design.

Responsibilities

• Design and develop mission-critical software powering end-to-end trade lifecycle.
• Build scalable post-trade platforms for clearing, settlement, and reconciliation.
• Develop tech for cash/margin management, trading fees, and corporate actions.
• Create data-intensive applications, analytics, and business tooling.
• Leverage AI/automation to improve operational efficiency and decision making.
• Collaborate with global teams to define architecture and deliver innovative solutions.
• Enforce best practices in software engineering and platform scalability.

Skills

Java

Python

Distributed systems

System design

Data-intensive apps

AI/ML interest

Job description

We're partnering with a world-leading hedge fund to hire a Software Engineer into a high-impact team responsible for designing and scaling the platforms that support the complete trade lifecycle across multiple asset classes and international markets.

This is an opportunity to solve complex engineering challenges at scale, developing the systems that sit at the heart of trade matching, clearing, settlement and reconciliation. You'll also play a key role in evolving the firm's broader post-trade ecosystem, spanning cash and margin management, trading fees, corporate actions, data platforms and next-generation analytics.

Working alongside exceptional engineers in London and New York, you'll help drive the firm's modernisation strategy, contributing to distributed systems, cloud-native architectures, advanced analytics and AI-driven initiatives that directly influence trading operations worldwide.

What You'll Be Doing

• Designing and developing mission-critical software that powers the end-to-end trade lifecycle
• Building highly scalable post-trade platforms covering clearing, settlement and reconciliation
• Engineering solutions supporting cash and margin management, trading fees and corporate actions
• Developing technology for derivatives processing and global product lifecycle management
• Creating data-intensive applications, analytics capabilities and business-critical tooling
• Leveraging AI and automation to enhance operational efficiency and decision making
• Collaborating with global engineering teams to define architecture and deliver innovative solutions
• Driving best practices across software engineering, system design and platform scalability

What We're Looking For

• Strong software engineering experience in Java and/or Python
• Proven track record designing and building distributed, scalable systems
• Excellent understanding of software architecture, system design and modern engineering principles
• Experience developing complex, data-intensive applications and business-critical platforms
• Strong problem-solving ability with a passion for tackling large-scale technical challenges
• Interest in analytics, data platforms, machine learning or AI technologies
• Financial markets, trading technology or post-trade experience is advantageous, but not essential

Why This Role?

• End-to-end ownership of systems and projects
• Direct impact on the firm's trading infrastructure
• Significant influence on technical direction and architecture
• Greenfield development alongside platform modernisation initiatives
• Exposure to distributed systems, large-scale data processing, and workflow orchestration