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Movement8

Senior Java Software Engineer

Remote

England, United kingdom

£ 68 /hour

Senior

Freelance

20-01-2026

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Skills

Java MongoDB CI/CD Architecture Software Architecture Autonomy react AWS Microservices

Job Specifications

Senior Java Developer – Java, AWS, MongoDB, - UK remote, Outside IR35 contract

2 month initial plus extension

We are working with a business who are rebuilding their core platform from the ground up and are looking for a Senior Java engineer who’s up for a real challenge.

Their system was originally built externally, and they've now brought it fully in-house. So, your mission is to get under the hood, untangle what’s there, and help them fix problems within teh code — cleaner, faster, and built to scale. Someone with a forensic mind who is then able to get on with the fix.

What You’ll Be Doing

Own the project entirely, end to end
Work across the stack using Java, React, AWS, MongoDB, and Elasticsearch.
Refactor and re-engineer core components
Collaborate closely with product and architecture teams.
Fix existing problems without rearchitecting and redesigning
You will be comfortable digging into existing codebase, breaking down and tracing the problem
Form and construct and then reverse engineer the problems

Experience

Strong experience within the Java AWS stack
Experience modernising or replatforming legacy systems.
Familiarity with microservices, CI/CD, or serverless architectures.
An interest in building scalable, high-performing distributed systems.
A great understanding of modern software architecture, design principles and data structures.
Practical experience with Java, React, MongoDB and AWS
Curiosity and persistence — you enjoy cracking tough problems and simplifying complexity.
The ability to balance autonomy with collaboration

If this sounds like you then let me know and we can set up a call.

1 stage interview process completed in the next week and immediate start thereafter

£450-£500 per day

About the Company

Movement8 – Tech Talent. Evolved. We are passionate about matching the right person for the role and never lose sight of the fact that recruitment, and our company, is a people business. We firmly believe that a closer working relationship means a higher quality, more accurate and ultimately a more enjoyable experience for everyone involved in the recruitment process, and is why we build genuine, long-lasting relationships with both our clients and the tech professionals involved within it. As the Tech industry continuall... Know more