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About the Role

We are looking for an experienced Senior Java Developer to join the engineering team at Xantura, helping to design, build, and evolve our cloud-based data and analytics platform used by local authorities and public sector organisations across the UK. This is a hands-on senior engineering role focused on developing scalable backend systems, improving platform reliability and performance, and contributing to the ongoing evolution of our architecture, engineering standards, and development practices. The role would suit someone who enjoys solving complex technical problems, working with large-scale data processing systems, and contributing to both technical delivery and engineering improvement initiatives.

Responsibilities

Design, develop, maintain and support Java-based backend services for data acquisition, processing, matching, analytics and integration, built to scale and perform under load
Build and maintain applications that use Java RMI for communication between services
Show real depth of understanding in your solutions: explain and justify your design decisions, and judge when to use an existing library and when a custom implementation is the better choice
Write clean, maintainable, well-tested code to agreed engineering standards, and collaborate with QA to meet the Definition of Done
Investigate and resolve complex production issues and performance bottlenecks, and improve resilience, monitoring and operational reliability
Contribute to architecture discussions, design and peer reviews, and mentor junior and mid-level developers

Requirements

A degree in Computer Science, Software Engineering or a related technical discipline, or equivalent practical experience
Strong commercial experience developing enterprise applications in Java, with excellent knowledge of Java 17+, Maven, and JUnit and automated testing approaches
Proven skill in performance optimisation and troubleshooting
Experience with CI/CD pipelines, source control workflows and Azure DevOps or similar lifecycle tooling
Strong grasp of software engineering principles, clean code and maintainable design, backed by sharp analytical and problem-solving skills
Clear communicator who collaborates well in multi-disciplinary teams, with a proactive mindset, strong ownership and a commitment to continuous improvement

Skills

Java
Java RMI
Maven
JUnit
Automated testing
Performance optimisation
Troubleshooting
CI/CD pipelines
Source control workflows
Azure DevOps
Software engineering principles
Clean code
Maintainable design
Analytical skills
Problem-solving skills

Location

London (Borough)

Work Type

Permanent
Full Time
Hybrid

Experience Level

Senior

Education Level

Degree in Computer Science, Software Engineering or a related technical discipline, or equivalent practical experience

Salary/Compensations

Competitive salary reviewed annually

Benefits

Training and development opportunities
25 days annual leave (plus bank holidays)
Company pension
Private medical insurance
Generous enhanced parental leave policies
Cycle to work scheme
Flu Vaccinations
Eye Test and contribution towards Glasses for VDU use
Employee Assistance Programme
Mental health and wellbeing support
Remote GP access
Counselling/therapy
Physiotherapy
Medical second opinions

About the Company

Xantura is helping to design, build, and evolve our cloud-based data and analytics platform used by local authorities and public sector organisations across the UK.
Work for a passionate, mission-driven company solving society’s big problems.