Senior Software Engineer in London

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Job Description
Senior Java Software Engineer
London (Hybrid – 3 days onsite)
Up to £100,000 Base
A growing financial technology company is looking for a Senior Java Software Engineer to join its backend engineering team.
This is a highly technical role focused on building and optimizing high-performance, low-latency distributed systems. You’ll be joining a strong team of engineers in a business that values deep technical expertise and clean architectural thinking.
The Role
You will join a small but highly capable engineering function and quickly become one of the most senior Java specialists in the business.
The position starts as a hands-on senior individual contributor role, with scope to take on technical leadership responsibility soon after.
Key Responsibilities
Design and build high-performance applications using Java 25 Develop and maintain microservices-based architectures Solve complex concurrency and multithreading problems Work on low-latency, high-throughput systems Build and deploy containerised services using Docker & Kubernetes Contribute to infrastructure and cloud-based deployments Mentor junior and mid-level engineers Raise engineering standards and influence architectural decisions
Essential Experience
Very strong, in-depth knowledge of Java Strong experience building microservices Proven experience working on low-latency or high-performance systems Deep understanding of concurrency and multithreading Experience with Docker and Kubernetes Experience working in cloud environments (GCP, AWS, or Azure) Strong communication skills and ability to operate in a small, ownership-driven team
Desirable
Financial services experience Experience with Dropwizard or similar lightweight frameworks Infrastructure-as-code exposure (e.g. Terraform) Front-end exposure (Angular) Experience using AI tools to improve development productivity
If you are interested in applying for this job please press the Apply Button and follow the application process. Energy Jobline wishes you the very best of luck in your next career move.
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Location:
London
Job Type:
FullTime
Category:
Engineer, Software Engineer, Senior, Engineering, Software

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