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Senior Microsoft Dynamics 365 Developer (HMRC & Security Cleared)

Simplex Services LtdLondon, UK🇬🇧United Kingdom

Quick overview

SeniorityMid Senior
Employment typeFull Time
Work modeHybrid
LocationLondon, UK, United Kingdom
C#.NETRESTAzureJavaScriptCI/CDAzure DevOps

Job description

We are seeking an experienced Microsoft Dynamics 365 Developer holding active HMRC security clearance to manage, maintain, and evolve our core enterprise applications. In this role, you will balance operational support with high-impact system integration projects. Because you will handle sensitive financial and government-regulated systems, strict compliance with PCI-DSS standards, security frameworks, and audit workflows is an absolute requirement.


Technical Skills:

  • Comprehensive knowledge of the Microsoft Dynamics 365 ecosystem (Finance & Operations, Customer Service, or Sales/CE depending on specific business unit).
  • Strong development skills in C#, .NET, JavaScript, Power Platform (Power Apps, Power Automate), and Liquid templates.
  • Deep understanding of Dataverse, Azure Integration Services, and RESTful APIs.
  • Solid experience with Azure DevOps for CI/CD pipeline automation and version control.

Key Responsibilities:

  • Application Maintenance & Support
    • Own the end-to-end support, troubleshooting, and optimization of existing Microsoft Dynamics apps.
    • Manage end-to-end deployment pipelines and environment management (Dev, Test, UAT, Prod).
    • Act as the senior technical escalation point for critical customer and system issues, ensuring rapid resolution and minimal business disruption.
    • Perform regular system monitoring, performance tuning, and health checks to maintain platform stability.
  • System Integration
    • Design, build, and maintain robust integrations between Microsoft Dynamics and third-party financial, internal, or government systems.
    • Utilize Azure integration services (Logic Apps, Azure Functions, Service Bus) and Dataverse/Web APIs to ensure seamless, real-time data flows.
  • Security, Compliance & Audit
    • Ensure all development and data handling strictly adhere to PCI-DSS compliance regulations.
    • Participate in rigorous security audits and vulnerability assessments, implementing remediation steps as required.
    • Maintain comprehensive documentation for deployments, configurations, compliance requirements, and architecture diagrams.

Preferred Qualifications:

  • B.E/BTech
  • Work Experience : Minimum experience of 8+ years
  • Active HMRC Clearance: Must have HMRC security clearance.

Key Competencies:

  • Strong relationship-building skills.
  • Excellent negotiation and persuasion skills.
  • High attention to detail and organizational skills.
  • Strong time management and multitasking abilities.

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