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ServiceNow Middlelayer Developer (m/f/d)
Industry
Information Technology (IT)
Area
Information Technology (IT)
Project info
- Period28.07.2025 - 28.10.2025
- Capacityfrom 90%
- Daily rate760 - 1000€
- LocationCologne, Germany
- Languages
- German(Native),
- English(Advanced)
- German
- Remote10 - 30%
Description
For the further development of a complex ServiceNow platform, a developer specialized in the middle layer is sought. The focus is on implementing business logic, integrations, and processing data between the frontend and backend systems.
Typical tasks:
Designing and developing server-side business logic in ServiceNow using Business Rules, Script Includes, and Workflows.
Designing, implementing, and maintaining REST- and SOAP-based integrations with third-party systems (e.g. SAP, Jira, HR systems) via IntegrationHub or custom scripts.
Developing and optimizing 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 middle layer processes.
Error rate in API calls and integrations (< 1%).
Success rate of automated workflows.
Code complexity (e.g. measured via SonarQube integration).
Adoption rate of new features enabled by the middle layer.
Key challenges, risks or specifics:
Complexity of dependencies between various ServiceNow modules and external systems.
Ensuring scalability under high transaction volumes.
Debugging asynchronous processes and integrations.
Following ServiceNow best practices to preserve platform upgradability ("out-of-the-box" vs. customizing).
Concrete deliverables:
Implemented and tested Script Includes and Business Rules.
Fully configured and documented IntegrationHub integrations.
Technical documentation of the developed logic and data flows.
Completed Update Sets, ready for deployment to production.
Lessons learned / best practices:
Encapsulate reusable logic in Script Includes rather than duplicating it across multiple Business Rules.
Use asynchronous Business Rules for long-running operations to avoid blocking the user experience.
Prefer the Flow Designer over the classic Workflow Editor for new automations.
Requirements
- Several years of experience developing on the ServiceNow platform.
- Proven expertise in server-side JavaScript and the ServiceNow API.
- Solid experience connecting third-party systems via REST/SOAP.
- Must-haves: ServiceNow Certified Application Developer (CAD) certification, analytical mindset, independent and precise working style.
- Nice-to-haves: experience with ServiceNow IntegrationHub, knowledge of IT Service Management (ITSM) or other ServiceNow modules (ITOM, HRSD), experience with performance analysis tools.
- Personality: problem-solving mindset, good communication skills for coordination with architects and frontend developers, attention to detail.
English
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