High-Performance Java Low-Latency Developer

Barclays; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

Barclays in London is seeking a Low Latency Developer to design, develop and optimize high-performance trading systems that underpin our markets platform. You will contribute to latency-sensitive algorithmic rollouts and ensure the platform remains fast, stable, and precise in a dynamic trading environment.

The role emphasizes secure coding, performance tuning, and collaboration with cross-functional teams to deliver reliable software for critical market activity.

Qualifications

• Experience with low-latency and high-performance Java development.
• Strong OS and network tuning knowledge.
• Experience with low-latency messaging and middleware.

Responsibilities

• Develop and deliver high-quality software solutions with scalable, maintainable, and performance-optimized code.
• Collaborate with product managers, designers, and engineers to define requirements and ensure alignment with business goals.
• Participate in code reviews and promote a culture of code quality and knowledge sharing.
• Stay informed of industry technology trends and contribute to technology communities.
• Adhere to secure coding practices to mitigate vulnerabilities and protect data.
• Implement effective unit testing to ensure code reliability.

Skills

Low latency Java

Lock-free programming

Performance tuning

OS & network tuning

Low latency messaging

Tools

KDB+

Time-series databases

Middleware protocols

Job description

Barclays in London is seeking a Low Latency Developer to design, develop and optimize high-performance trading systems that underpin our markets platform. You will contribute to latency-sensitive algorithmic rollouts and ensure the platform remains fast, stable, and precise in a dynamic trading environment.

The role emphasizes secure coding, performance tuning, and collaboration with cross-functional teams to deliver reliable software for critical market activity.