Senior Java Developer

iO Associates; Remote; GBP 100,000 - 125,000; Full time

Job summary

A leading public-sector organisation based in the UK is seeking a skilled Senior Java Developer to join their mission-led engineering team. This remote role involves developing high-availability Java-based services and microservices for a major digital transformation project. Candidates should have experience with modern Java technologies, including Spring Boot and AWS, with the opportunity to mentor junior developers. The position offers a contract rate of up to £575 inside IR35 for an initial 4 months.

Qualifications

• Experience developing Java-based services and microservices.
• Ability to mentor junior developers.
• Familiarity with containerized deployments and zero-downtime releases.

Responsibilities

• Develop Java-based services for a high-availability platform.
• Design, build, test and support production-ready software.
• Contribute to system improvements in performance and security.

Skills

Java 8-17

Spring Boot

Hibernate

MySQL

AWS-hosted containerised environment

Gradle

Maven

Git

Thymeleaf

HTML

CSS

Job description

Senior Java Developer

Swindon (Remote)

Contract Role- Up to £575 inside IR35 (4 months Initially)

iO Associates is working with a leading public-sector-backed organisation on a major digital transformation programme. Their platform is responsible for managing and distributing billions of pounds of innovation funding each year, and they're expanding the engineering team to support a series of new initiatives, including increased automation, improved security, and the exploration of AI-driven solutions.

They're now looking for an experienced Java Developer to join a collaborative, mission-led team building and supporting a large, high-availability platform used across the UK.

The Role:

You’ll play a key part in developing Java-based services and microservices, contributing to a system that runs 24/7 and is deployed via containerised, zero-downtime releases on AWS. This is a hands‑on engineering role within a modern Scrum team where you’ll design, build, test, and support production‑ready software.

You’ll also have the chance to mentor junior developers, influence development standards, and contribute to system improvements that enhance performance, security, and user experience.

What You’ll Be Working With:

• Java 8-17
• Spring Boot / Spring MVC
• Hibernate
• MySQL
• AWS-hosted containerised environment
• Gradle or Maven
• Git / version control
• Front‑end tech: Thymeleaf, JSP, HTML, CSS

Our client is looking for someone URGENTLY and will conduct a 1 stage interview process to get it wrapped up this side of Christmas!

If you’re interested in this role, or know someone who would be, then please apply to this advert and reach out to a. methula@ioassociates. Co. uk