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ServiceNow Middlelayer Developer (m/f/d)

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Industry
Information Technology (IT)
Area
Information Technology (IT)

Project info

  • Period
    07.07.2025 - 07.10.2025
  • Capacity
    from 90%
  • Daily rate
    760 - 1000€
  • Location
    Cologne, Germany
  • Languages
    • German
      (Native)
      ,
    • English
      (Advanced)
  • Remote
    10 - 30%

Description

For the further development of a complex ServiceNow platform, a developer specializing in the middlelayer level is sought. The focus is on implementing business logic, integrations, and data processing between the frontend and backend systems.

  • Typical Areas of Responsibility:

  • Design and development of server-side business logic in ServiceNow using Business Rules, Script Includes, and Workflows.

  • Design, implementation, and maintenance of REST- and SOAP-based integrations to third-party systems (e.g. SAP, Jira, HR systems) via IntegrationHub or custom scripts.

  • Development and optimization of data flows and transformations within the platform.

  • Performance analysis and optimization of server-side scripts and database interactions.

  • Ensuring platform stability and security through robust and error-resistant coding.

  • Relevant Technologies, Tools or Methods:

  • ServiceNow platform: in-depth knowledge of the Glide API (GlideRecord, GlideSystem), server-side scripting (JavaScript ES5).

  • Integrations: IntegrationHub (Spokes), REST/SOAP API Explorer, JSON, XML.

  • Automation: Flow Designer, Workflow Editor.

  • Development tools: ServiceNow Studio, VS Code with ServiceNow plugins.

  • Methodology: Agile (Scrum), use of Update Sets and Application Scopes for deployment.

  • Typical KPIs or Success Metrics:

  • Transaction response times for critical middlelayer processes.

  • Error rate for API calls and integrations (< 1%).

  • Success rate of automated workflows.

  • Code complexity (e.g., measured via SonarQube integration).

  • Adoption rate of new functionalities enabled by the middlelayer.

  • Particular Challenges, Risks or Specifics:

  • Complexity of dependencies between various ServiceNow modules and external systems.

  • Ensuring scalability with high transaction volumes.

  • Debugging asynchronous processes and integrations.

  • Adhering to ServiceNow best practices to avoid compromising platform upgradeability ("out-of-the-box" vs. customizing).

  • Concrete Deliverables:

  • Implemented and tested Script Includes and Business Rules.

  • Fully configured and documented integrations in IntegrationHub.

  • Technical documentation of the developed logic and data flows.

  • Completed Update Sets, ready for deployment to the production environment.

  • Lessons Learned / Best Practices:

  • Reusable logic should be encapsulated in Script Includes rather than duplicated across multiple Business Rules.

  • Asynchronous Business Rules should be preferred for long-running operations to avoid blocking the user experience.

  • The Flow Designer is preferable to the classic Workflow Editor for new automations.

Requirements

  • Several years of experience in development on the ServiceNow platform.
  • Proven expertise in server-side JavaScript and the ServiceNow API.
  • Solid experience in connecting third-party systems via REST/SOAP.
  • Must-haves: ServiceNow Certified Application Developer (CAD) certification, analytical thinking skills, independent and precise working style.
  • Nice-to-haves: experience with ServiceNow IntegrationHub, knowledge in IT Service Management (ITSM) or other ServiceNow modules (ITOM, HRSD), experience with performance analysis tools.
  • Personality: problem-solver mentality, good communication skills for coordination with architects and frontend developers, attention to detail.