Role Title: Java Developer - ICON experience mandatory Location: Knutsford - Hybrid set up Duration: 31/12/2025 - with extensions £400 - £490 a day inside Role Description: We are looking for a highly skilled Java/ICON Developer with strong Java expertise to join our Payments Technology team. The successful candidate will play a key role in designing, developing, and maintaining payment processing solutions using the Finastra ICON/IPF platform, ensuring high performance, scalability, and compliance with regulatory standards. Required Skills & Experience: 5 years of previous use in Java development within financial services. 2 years of hands-on use of Finastra ICON Payment Framework (IPF). Strong understanding of payment processing systems, messaging standards (SWIFT, ISO 20022, SEPA, CHAPS, FPS), and clearing/settlement flows. Experience with Spring Boot, REST APIs, JMS, and SQL/Oracle. Familiarity with CI/CD pipelines, Git, JIRA, and Agile methodologies. Strong problem-solving skills and ability to work in a fast-paced, regulated environment. Key Responsibilities: Solution Development: Design and develop payment processing solutions using ICON Payment Framework (IPF) and Java. Customise and extend IPF modules to meet business and regulatory requirements. Integrate ICON with upstream/downstream systems (e.g., core banking, fraud, AML, SWIFT, SEPA, FPS). Technical Delivery: Participate in the full software development life-cycle - from requirements gathering to deployment and support. Write clean, maintainable, and well-documented code following best practices and coding standards. Conduct unit testing, integration testing, and support UAT and production deployments. Collaboration & Support: Work closely with Business Analysts, Solution Architects, QA, and DevOps teams to deliver high-quality solutions. Provide L3 support for production issues related to ICON and payment processing. Participate in code reviews, design discussions, and technical workshops. Compliance & Governance: Ensure solutions comply with internal security, risk, and regulatory frameworks (e.g., PSD2, ISO 20022). Maintain technical documentation and contribute to knowledge sharing across teams. Preferred Qualifications: Experience with Finastra Global PAYplus (GPP) or other payment hubs. Exposure to cloud-native development (AWS, Azure) and containerisation (Docker, Kubernetes). Knowledge of DevOps practices and automated testing frameworks. Financial services background, particularly in transaction banking or corporate payments. Disclaimer: Notwithstanding 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.