Senior Java Software Engineer (Contractor)

UK-Based | Fully Remote

Outside IR35  

Contract to Dec 2026

We are supporting a global engineering and technology organisation in the search for a Senior Java Software Engineer (Contractor) to join their Performance Engineering & Research team.

This is a fully remote opportunity (UK-based candidates only) working on robust, scalable software that supports sophisticated control algorithms and performance optimisation systems.

The Role

You will design, build and maintain efficient, high-performance Java applications, contributing across the full software development lifecycle including:

Requirements analysis and system design
Development and implementation
Testing and deployment
CI/CD and automation improvements
Technical documentation
Working under the guidance of the Principal Performance Engineer, you will collaborate with solution design, integration, simulation and delivery teams globally.

What We're Looking For

Minimum 5 years' professional Java development experience
Strong understanding of OOP, design patterns and software architecture principles
Proven experience delivering scalable, maintainable systems
Experience with version control (Git) and CI/CD tools (e.g., Jenkins)
Exposure to containerisation and logging technologies (e.g., Docker, ELK)
Strong analytical and problem-solving capability
Excellent communication skills
Nice to have: Experience within logistics, WMS or warehouse automation — however strong Java developers from any industry will be considered.

Contract Details

Fully remote (UK-based candidates only)
Outside IR35
Contract funded through December 2026
Full-time engagement
ASAP start
No predefined rate band — quality is prioritised
ATA is committed to creating a diverse workforce and is an equal opportunities employer. We welcome applications from all suitably qualified persons regardless of age, disability, gender, marriage and civil partnership, pregnancy and maternity, race, religion or belief, sex, and sexual orientation