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Randstad Logo Randstad · IT - Software Development

Senior .NET Migration Engineer

United Kingdom, London 55000.00 - 60000.00 GBP / Year · Job Posted June 30, 2026
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Job Description

Forget standard "lift-and-shift." We are completely modernizing our backend estate, moving from a legacy London Datacentre straight into AWS and Kubernetes using .NET 10 as our target runtime. You will build the "golden paths," shared templates, and automated pipelines to migrate applications at scale. Best of all? You will be pairing traditional automation with AI coding agents (like Claude Code) to drive massive, automated refactoring.

Job Responsibility

  • Lead the application-layer migration of backend services to AWS & K8s
  • Design shared libraries and service templates to ensure architectural consistency
  • Build migration pipelines combining Terraform, CI/CD, and agentic AI tools
  • Partner with the Platform team on observability, networking, and security

Requirements

  • Deep C# experience (8+ years) across .NET Core and legacy .NET Framework
  • production Kubernetes experience
  • Strong AWS and Terraform skills
  • SQL Server proficiency
  • experience upgrading legacy auth to modern token patterns
  • Active daily use of AI coding tools to accelerate development
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