Senior Java Developer

Project overview

Job Title: Senior Java Developer

Project details

Basildon 4x a week

Salary/Rate: Up to £613 per day

Start Date: Start of November 2026

Job Type: 7 months - likelihood of extension

Company Introduction

As a highly regulated financial services organisation, operates mission-critical platforms that process large volumes of transactions securely and reliably. Technology plays a central role in delivering exceptional customer experiences while maintaining the highest standards of security, resilience, and operational excellence.

Job Responsibilities/Objectives

Required Skills/Experience

Disclaimer

Not withstanding any guidelines given to level of experience sought, we will consider candidates from outside this range if they can demonstrate the necessary competencies.

Square One is acting as both an employment agency and an employment business, and is an equal opportunities recruitment business. Square One embraces diversity and will treat everyone equally. Please see our website for our full diversity statement.

• Designing and building high-scale Back End services using Java
• Developing secure and resilient identity and access management solutions
• Working on systems supporting high-volume transactional workloads in a regulated environment
• Applying Test Driven Development (TDD) throughout the software development lifecycle
• Strongexperience in Back End software engineering
• Strong Java development experience
• Experience designing and building high-scale, highly available Back End services
• Experience working within financial services, banking, lending, payments, or other regulated environments
• Experience with Identity and Access Management (IAM) platforms
• Knowledge of OAuth, OpenID Connect, SSO, or authentication services
• Experience with microservices and distributed systems
• Exposure to cloud platforms such as GCP, AWS, or Azure
• Start: 2 November 2026
• Duration: 28 weeks
• Location: Basildon, UK, GB
• Rate: 75-77 EUR/h