Senior Java Developer - Financial Services - Basildon

Job Title: Senior Software Developer - Basildon 4x a week Location: Basildon4x a week Salary/Rate:Up to £613 per day Start Date: November 2026 Job Type: Initially 7 month contract (likely to extend for 12 months)Company IntroductionAs 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/ObjectivesDesigning and building high-scale Back End services using JavaDeveloping secure and resilient identity and access management solutionsWorking on systems supporting high-volume transactional workloads in a regulated environmentApplying Test Driven Development (TDD) throughout the software development life cycleRequired Skills/ExperienceStrongexperience in Back End software engineeringPair Programming experienceTest driven developmentStrong Java development experienceStrong IAM (Identity Access Managementpreferably Oauth andamp; AzureExposure to cloud platforms such as GCP, AWS, or AzureExperience designing andamp; building high-scale Back End servicesDisclaimer 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 ..... full job details .....