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Lead Java Developer

2 weeks ago


London, Greater London, United Kingdom Logistic Everywhere Full time £338,000 per year

Java Engineer (Sterling OMS / SIP) – 6-Month Contract – up to £650/day (Outside IR35)

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

What You'll Do

  • 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.

Who You Are


  • 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.

Core Technical Skills

  • 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.

Desirable Skills

  • 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.

Why Join

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