Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Modernise critical systems and enhance the technical health of financial applications.
- Company: Dynamic tech firm focused on innovative solutions in finance.
- Benefits: Competitive pay, flexible working options, and opportunities for skill development.
- Why this job: Join a team making impactful changes to vital financial systems.
- Qualifications: Experience with Java, Kotlin, or C# and modernising legacy systems.
- Other info: Collaborative environment with potential for career advancement.
The predicted salary is between 36000 - 60000 £ per year.
We’re looking for a hands-on software engineer to help modernise a suite of business critical systems that underpin core financial data and trading workflows. This role focuses on upgrading and stabilising existing services rather than building greenfield features. The work involves improving the technical health of the platform, reducing risk, and ensuring the systems remain secure, maintainable, and reliable.
Responsibilities
- Review, understand, and take ownership of existing applications written in Java
- Upgrade legacy frameworks, runtimes, and dependencies to current supported versions
- Plan and execute changes safely, including testing, integration, and controlled releases
- Work closely with other engineers and data teams to ensure changes do not break downstream systems
- Help remove known vulnerabilities and operational risks from the platform
- Participate in production support and incident investigation when needed
- Document changes and improve the long term maintainability of the systems
What you’ll need
- Strong production experience with Kotlin, Java, C#, or similar languages
- Experience upgrading or modernising legacy systems in real environments
- Experience with containerised environments, Kubernetes, or data intensive systems is beneficial
Java Software Engineer in London employer: Arcus Search
Contact Detail:
Arcus Search Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Java Software Engineer in London
✨Tip Number 1
Network like a pro! Reach out to your connections in the tech world, especially those who work with Java or have experience in application modernisation. A friendly chat can lead to insider info on job openings that aren't even advertised yet.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your past projects, especially those involving upgrading legacy systems. This will give potential employers a clear view of what you can bring to the table.
✨Tip Number 3
Prepare for technical interviews by brushing up on your Java and Kotlin knowledge. Be ready to discuss your experience with containerised environments and how you've tackled challenges in modernising applications.
✨Tip Number 4
Don’t forget to apply through our website! We’ve got loads of opportunities waiting for talented engineers like you. Plus, it’s a great way to ensure your application gets the attention it deserves.
We think you need these skills to ace Java Software Engineer 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 our needs, so don’t be shy about showcasing your achievements!
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you’re excited about modernising legacy systems and how your background makes you the perfect fit for this role. Keep it engaging and personal!
Showcase Your Problem-Solving Skills: In your application, mention specific examples where you've tackled challenges in upgrading or maintaining systems. We love seeing how you approach problems and what solutions you've implemented!
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 Arcus Search
✨Know Your Java Inside Out
Make sure you brush up on your Java skills, especially around upgrading legacy systems. Be ready to discuss specific examples of how you've tackled similar challenges in the past. This will show that you not only understand the language but also have practical experience in modernising applications.
✨Familiarise Yourself with the Tech Stack
Since this role involves working with containerised environments and possibly Kubernetes, it’s a good idea to get comfortable with these technologies. If you can, try to bring up any relevant projects or experiences during the interview to demonstrate your hands-on knowledge.
✨Prepare for Problem-Solving Questions
Expect questions that assess your problem-solving skills, especially around maintaining system reliability and security. Think of scenarios where you’ve had to troubleshoot issues or improve system performance, and be ready to explain your thought process.
✨Show Your Team Spirit
Collaboration is key in this role, so be prepared to discuss how you’ve worked with other engineers and data teams in the past. Highlight any experiences where you’ve successfully communicated changes or resolved conflicts, as this will showcase your ability to work well in a team environment.
