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 making a difference in the public sector.
- Benefits: Enjoy flexible hours, remote work, competitive salary, and generous annual leave.
- Other info: Great opportunities for training, development, and career growth.
- Why this job: Make an impact by solving complex problems and mentoring fellow developers.
- Qualifications: Strong Java experience and a passion for collaborative problem-solving.
The predicted salary is between 56700 - 69300 £ per year.
Senior Java Developer
Department
Platform Delivery
Employment Type
Permanent - Full Time
Location
London
Reporting To
- Phil Miller
- Description
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 Dev Ops
- 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
- 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
- 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 Dev Ops 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
- #J-18808-Ljbffr
Senior Java Developer in London employer: Xantura
Xantura is an exceptional employer, offering a dynamic work environment in London where innovation meets public sector impact. As a Director of Platform, you will not only lead the strategic evolution of the OneView platform but also enjoy a flexible work culture that prioritises employee well-being and professional growth. With competitive salaries, comprehensive benefits, and a mission-driven focus on solving societal challenges, Xantura provides a rewarding opportunity for those looking to make a meaningful difference.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Java Developer in London
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Xantura or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Xantura.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Xantura.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Xantura that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Senior Java Developer in London
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Xantura.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Xantura and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Xantura
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Xantura uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
