Lead Java Developer

We’re seeking an  experienced Java Engineer with strong expertise in  IBM Sterling Order Management System (OMS)and  Sterling Intelligent Promising (SIP)to join an AI-enabled consultancy delivering intelligent fulfilment and optimisation solutions.

This role blends  backend development and  product extension work — enabling smarter fulfilment, sourcing optimisation, and seamless integration across order channels.

Contract: 6 months (Outside IR35)

Location: Hybrid – Paddington, 2–3 days per week

Rate: Up to £650 per day

• Design, develop, and maintain  custom Java components that extend IBM Sterling OMS and SIP functionality.
• Implement and customise  workflows, sourcing rules, and fulfilment logic determining how and where orders are fulfilled.
• Integrate OMS and SIP with  external systems and data sources using APIs, queues, and event-driven interfaces.
• Enhance  inventory visibility and  sourcing optimisation through SIP configuration and Java-based customisation.
• Develop and maintain  automated test frameworks (Cucumber/Java) for order flow and sourcing validation.
• Support  CI/CD pipelines , contributing to the migration from  Jenkins to GitHub Actions .
• Troubleshoot  performance, integration, and workflow issues in Sterling OMS and SIP environments.
• Collaborate closely with  functional configuration teams to align custom code with business rules and configuration.

• A  hands-on engineer with deep technical understanding of Sterling OMS and SIP.
• Comfortable working across  technical and functional teams , bridging configuration and customisation.
• Analytical and detail-oriented , with strong debugging and optimisation skills.
• Passionate about improving  automation, integration, and reliability in fulfilment systems.
• Experienced in  complex enterprise environments , balancing speed with quality.

• Java (Core and Enterprise)– proven, hands-on engineering experience.
• XML, XSLT, JSON, SQL – for data handling, configuration, and integration.
• Sterling OMS – solid understanding of architecture, workflows, data models, and extensibility points.
• Sterling Intelligent Promising (SIP)– experience with configuration, sourcing logic, and OMS integration.
• Cucumber (Java)or equivalent test automation tools.
• CI/CD: Jenkins and GitHub Actions for automated build, test, and deployment.
• Version control: Git/GitHub.

• Knowledge of SIP features such as  real-time inventory availability ,  promise logic , and  capacity constraints .
• Familiarity with  API-based orchestration between OMS, SIP, and external fulfilment/inventory systems.
• Exposure to  containerised deployments (Docker/Kubernetes) and  cloud hosting (Azure or AWS).
• Understanding of  monitoring, alerting, and observability tools (e.g. New Relic, PagerDuty).
• Experience with  agile delivery and collaboration across distributed teams.

• Competitive daily rates
• Collaborative, forward-thinking team
• Opportunity to work on  cutting-edge AI-enabled fulfilment and optimisation projects