Java Developer

About the Role

We are partnering with a leading investment bank to onboard an experienced Java Developer for a critical front office trading technology team. This is an initial 6‑month contract position based in London, offering a hybrid work model. The role is designed for a technically proficient professional who thrives in high‑pressure environments and is passionate about developing robust, scalable trade processing systems.

The successful candidate will work closely with front office traders, quantitative analysts, and other technology teams to enhance existing systems and develop new solutions that support the bank’s trading activities. The position provides an excellent opportunity to gain exposure to cutting‑edge financial technology and work within a fast‑paced, high‑performance environment that values innovation and collaboration.

The ideal candidate will possess strong technical expertise and relevant experience in investment banking or capital markets. A solid background in trade processing systems and familiarity with trade platform frameworks are essential. Candidates should demonstrate proficiency in Java, preferably Java 17, and have hands‑on experience working with event‑driven architectures such as Apache Kafka. Knowledge of containerization and orchestration tools like Kubernetes, along with experience in Linux/Unix environments, is a must.

Additionally, the candidate should have a good understanding of low‑latency, high‑throughput system design and problem‑solving skills tailored to front office trading environments. Prior experience working directly with trading desks or knowledge of asset classes such as FX, Fixed Income, or Derivatives will be advantageous.

• Develop and enhance high‑performance trade processing systems to support real‑time trading activities.
• Collaborate with front office traders, quantitative analysts, and other technology teams to deliver innovative and reliable technical solutions.
• Design and implement scalable, event‑driven architectures utilizing Apache Kafka to ensure efficient data flow and processing.
• Contribute to the development, optimization, and maintenance of Trade Runner frameworks, ensuring they meet performance and reliability standards.
• Build containerised microservices deployed via Kubernetes, ensuring modularity, scalability, and ease of deployment.
• Maintain system reliability and performance within a Linux‑based environment, implementing best practices for system stability and security.
• Participate actively within Agile teams, engaging in design discussions, code reviews, and adherence to best coding practices.
• Identify and troubleshoot system issues promptly, providing effective solutions to minimise downtime and impact on trading activities.
• Stay updated with emerging technologies and industry trends to continuously improve system architecture and performance.

Lorien offers a competitive day rate commensurate with experience, with the position falling inside or outside IR35 depending on engagement specifics. The role provides an excellent platform to work on high‑impact trading systems within a prestigious investment bank. You will gain valuable exposure to front office technology, working directly with business stakeholders and trading teams. The environment is collaborative, fast‑paced, and innovative, encouraging professional growth and development.

Additionally, the contract offers flexibility with a hybrid working model, and the opportunity to enhance your expertise in financial technology and systems architecture.

Lorien is committed to creating an inclusive environment and is proud to be an equal opportunity employer. We celebrate diversity and are dedicated to ensuring that all employees and applicants are treated fairly and without discrimination. We encourage individuals of all backgrounds, experiences, and perspectives to apply and join our team, fostering a culture of respect, equity, and opportunity for everyone.