Senior Java Developer

Senior Java Developer

Location: Telford (2 days per week onsite / 2 days per month depending on project requirements)

Rate: £550 per day

Contract Length: 12 Months

Clearance: BPSS Required

Overview

We are seeking experienced Senior Java Developers to join the COTAX Futures Team within Tax Administration, supporting a major programme focused on the modernisation of HMRC legacy services.

You will work within agile Scrum teams alongside Java Engineers, Front End Developers and Quality Engineers to deliver scalable, cloud-native solutions and modern microservices architecture. This is an excellent opportunity to contribute to a large-scale digital transformation programme operating within a complex, enterprise-level environment.

Whilst previous Public Sector experience is desirable, it is not essential. Candidates must demonstrate experience working within large, complex technical environments, ideally within regulated industries such as Banking, Financial Services, Insurance, Utilities, Telecommunications, or similar.

Key Responsibilities

Design, develop and maintain Java-based microservices and APIs.

Build and enhance RESTful services using Spring Boot.

Develop robust, scalable and secure backend solutions.

Containerise and deploy applications using Kubernetes.

Write and maintain automated unit tests.

Collaborate effectively within Agile Scrum teams.

Support the modernisation of legacy platforms and services.

Contribute to technical design discussions and architectural decisions.

Participate in code reviews and uphold engineering best practices.

Utilise AI-assisted development tools where appropriate to improve analysis, design, development, testing and code quality.

Essential Skills & Experience

Strong commercial experience with Java

Extensive experience developing REST APIs using Spring Boot

Experience writing unit tests using JUnit

Strong understanding of JSON structures and data formats

Hands-on experience with Kubernetes, including:

Containerising applications

Deploying and managing microservices

Troubleshooting deployments within containerised environments

Experience working within Agile/Scrum delivery teams

Proven track record delivering solutions within complex enterprise environments

Desirable Skills

Experience with any of the following would be advantageous:

JPA

Kibana

Maven

Mockito

AWS

GitLab

Helm

OpenAPI

SQL

Shell Scripting

Preferred Backgrou...