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    Senior webMethods Integration Developer

    Technology
    CBSbutler Holdings Limited trading as CBSbutler
    London
    Contract
    Competitive
    Remote

    Job Description

    Job title: Senior webMethods Integration Developer

    Contract: 6 months rolling

    Rate: 625 - 645 per day inside ir35

    Location: Remote - Some travel to Client site will be required (estimate 1-2 times per month to London and/or the South / South-East).

    SC security clearance is required for this role.

    I'm looking for a Senior webMethods Integration Developer to join an agile delivery team working on a mission-critical UK MOD platform. This is a genuinely hands-on development role for someone who knows webMethods Integration Server, Universal Messaging and API Gateway inside out and is comfortable taking ownership of integration development, enhancements and live-service support.

    You'll lead the ongoing development and support of a major integration platform, working closely with Product Owners, clients, QA, UX and DevSecOps teams to deliver new functionality and keep the live platform running securely and reliably. You'll be involved across the full integration lifecycle: design, development, integration, testing, troubleshooting and continuous improvement.

    What you'll be doing

    • Develop REST and SOAP services using webMethods Designer

    • Develop Universal Messaging / JMS packages

    • Configure and maintain webMethods API Gateway

    • Design and advise on integration patterns and best practice

    • Investigate and resolve defects, bugs and live-service issues

    • Develop and test new functionality against Product Owner / client priorities

    • Contribute to technical design discussions and code reviews

    • Monitor and troubleshoot applications and integrations

    • Maintain technical documentation in Confluence

    • Work within an Agile delivery environment using Jira

    • Ensure secure coding practices and alignment with the platform's security posture

    Essential technical experience

    webMethods

    • webMethods Flow Services 10.15+

    • webMethods Integration Server 10.15+

    • webMethods Designer

    • Universal Messaging / JMS

    • webMethods API Gateway 10.15+

    • REST / SOAP

    • Swagger / OpenAPI

    • AWS S3 connectors / file transfer Data & search

    • SQL - Oracle, MSSQL or MySQL

    • Elastic / OpenSearch Cloud & infrastructure

    • Azure

    • Kubernetes fundamentals - pods, services, ingress, Istio, Traefik

    • Docker / containerisation / containerd Agile tooling

    • Jira

    • Confluence

    • Teams

    If you're an SC-cleared webMethods specialist who wants a long-running contract working on a genuinely important UK MOD platform, I'd be keen to speak with you.

    Posted on October 4, 2026

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