At a Glance
- Tasks: Design and develop scalable Java backend systems for a cloud-based data platform.
- Company: Join Xantura, a mission-driven tech company tackling society's big challenges.
- Benefits: Enjoy competitive salary, flexible hours, remote work, and generous leave policies.
- Other info: Great opportunities for training, development, and career growth.
- Why this job: Make a real impact while working with cutting-edge technology in a collaborative environment.
- Qualifications: Strong Java development experience and a passion for solving complex technical problems.
The predicted salary is between 70000 - 80000 £ per year.
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. You will work closely with Product, QA, Infrastructure, Customer Success, and Delivery teams to deliver high-quality technical solutions while helping to mentor and support other developers within the team. 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.
Key Responsibilities
- Design, develop, maintain, and support Java-based backend systems and services
- Develop scalable and performant solutions for data acquisition, processing, matching, analytics, and integration workloads
- Create and maintain high-quality SQL queries, stored procedures, and database structures
- Contribute to technical architecture discussions and platform evolution
- Improve system performance, scalability, resilience, monitoring, and operational reliability
- Write clean, maintainable, well-tested code following agreed engineering standards and best practices
- Participate in peer reviews, technical design reviews, and collaborative problem solving
- Support and improve CI/CD pipelines and automated deployment processes using Azure DevOps
- Investigate and resolve complex production issues, system failures, and performance bottlenecks
- Support and troubleshoot services running in Linux-based environments
- Work closely with infrastructure and platform teams to optimise Linux-hosted services and deployments
- Collaborate with QA teams to ensure robust testing and adherence to Definition of Done standards
- Mentor and support junior and mid-level developers within the team
- Contribute to continuous improvement of development processes, documentation, tooling, and engineering discipline
- Support the migration and modernisation of legacy systems and services into Azure-hosted solutions
Skills, Knowledge & Expertise
We’d love to hear from you if you have:
- A degree in Computer Science, Software Engineering, or a related technical discipline, or equivalent practical experience
- Strong commercial experience developing enterprise applications using Java
- Excellent technical knowledge of:
- Java 17+
- SQL and relational database design
- REST API development
- Maven
- Concurrent and asynchronous processing
- Performance optimisation and troubleshooting
- JUnit and automated testing approaches
- Strong working knowledge of Linux environments, including command-line tools, scripting, process management, logging, and troubleshooting
- Experience deploying, configuring, and supporting Java applications within Linux-based environments
- Experience working with high-volume or data-intensive systems
- Experience working with CI/CD pipelines and source control workflows
- Experience using Azure DevOps or similar development lifecycle tooling
- Strong understanding of software engineering principles, clean code practices, and maintainable application design
- Strong analytical and problem-solving skills
- Good communication and collaboration skills, with the ability to work effectively within multi-disciplinary teams
- A proactive mindset with strong ownership, accountability, and continuous improvement focus
Bonus points if you have:
- Experience working within Microsoft Azure environments
- Experience with data engineering or data warehousing platforms
- Experience working with distributed systems or event-driven architectures
- Experience with monitoring and observability tooling
- Experience working within Agile/SCRUM teams
- Experience improving engineering governance, development processes, and QA practices
- Experience supporting or modernising legacy enterprise applications
- Knowledge of security, compliance, and operational best practices within enterprise environments
Job Benefits
- Competitive salary reviewed annually
- Work for a passionate, mission-driven company solving society’s big problems
- Work flexible hours around life commitments with a focus on delivering company value rather than hours worked
- Ability to work remotely (excluding face-to-face Team Meetings and client meetings)
- 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
Senior Java Developer in London employer: Xantura Limited
Xantura is an exceptional employer, offering a dynamic work environment in London where innovation meets social impact. With a strong focus on employee growth, we provide extensive training and development opportunities, flexible working hours, and a supportive culture that values collaboration and mentorship. Join us to be part of a mission-driven team dedicated to solving significant societal challenges while enjoying competitive benefits and a commitment to your well-being.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Java Developer in London
✨Tip Number 1
Network like a pro! Reach out to your connections in the tech world, especially those who work at Xantura or similar companies. A friendly chat can sometimes lead to insider info about job openings or even a referral.
✨Tip Number 2
Show off your skills! Create a GitHub profile or personal website showcasing your Java projects and contributions. This gives potential employers a taste of what you can do beyond your CV.
✨Tip Number 3
Prepare for technical interviews by brushing up on your coding skills and system design knowledge. Practice common Java interview questions and be ready to discuss your past projects in detail.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you’re genuinely interested in joining our team.
We think you need these skills to ace Senior Java Developer in London
Some tips for your application 🫡
Tailor Your CV:Make sure your CV highlights your experience with Java and any relevant projects you've worked on. We want to see how your skills align with the role, so don’t be shy about showcasing your achievements!
Craft a Compelling Cover Letter:Your cover letter is your chance to tell us why you’re the perfect fit for the Senior Java Developer role. Share your passion for solving complex problems and how you can contribute to our team’s success.
Showcase Your Technical Skills:Be specific about your technical expertise in Java, SQL, and any other relevant technologies. We love seeing examples of your work, so if you have a portfolio or GitHub, include that too!
Apply Through Our Website:We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it’s super easy!
How to prepare for a job interview at Xantura Limited
✨Know Your Java Inside Out
Make sure you brush up on your Java skills, especially the latest features in Java 17+. Be ready to discuss your experience with enterprise applications and how you've tackled complex problems using Java. Prepare to share specific examples of projects where you developed scalable backend systems.
✨SQL Skills Are Key
Since you'll be working with SQL and relational databases, ensure you're comfortable writing high-quality SQL queries and stored procedures. You might be asked to solve a problem on the spot, so practice common SQL scenarios and be ready to explain your thought process.
✨Show Off Your Problem-Solving Skills
This role requires strong analytical skills, so prepare to discuss how you've approached troubleshooting and performance optimisation in past projects. Think of specific instances where you resolved production issues or improved system reliability, and be ready to walk through your approach.
✨Collaboration is Crucial
You'll be working closely with various teams, so highlight your communication and collaboration skills. Be prepared to discuss how you've mentored junior developers or contributed to team projects. Share examples that demonstrate your ability to work effectively in multi-disciplinary teams.
