Senior .NET / AWS Cloud Migration Engineer
RemotePortugal
Job Summary
Assess existing .NET services, infrastructure, integrations, and dependencies to map service dependencies and identify migration sequencing. Design and implement cloud-native solutions within AWS, containerising services using ECS and managing infrastructure via Terraform and Infrastructure as Code. Plan and execute incremental migration waves with safe cutover strategies, including blue/green deployments, parallel running, and rollback approaches to ensure minimal or zero downtime. Solve complex challenges involving shared databases, authentication, and legacy integrations while improving automation, observability, and operational readiness. Collaborate with engineering teams and stakeholders to identify risks and delivery priorities within an Agile environment.
Required Qualifications
- Strong professional experience developing and operating production systems using modern .NET
- Recent, hands-on commercial experience with AWS
- Direct experience migrating production applications or services into AWS
- Strong practical experience with AWS ECS and containerised workloads
- Current hands-on experience with Terraform and Infrastructure as Code
- Strong understanding of event-driven and asynchronous architectures
- Production experience with SNS/SQS or comparable messaging technologies
- Experience delivering complex migrations involving multiple interconnected services and dependencies
- Strong understanding of CI/CD, automated deployments, rollback strategies and production readiness
- Experience executing production migrations where downtime was unacceptable or heavily restricted
- Ability to quickly understand an unfamiliar technical estate and turn discovery into an actionable migration plan
- Strong personal technical ownership; you should be comfortable explaining what you personally designed, implemented and changed, including the decisions and trade-offs you made
- Experience working on large-scale, high-availability platforms where production downtime has significant business impact
- Experience working in an Agile, cross-functional team
- Strong verbal and written communication skills in English
Desired Qualifications
- Experience with New Relic would also be beneficial
- Hands-on experience with NServiceBus
- Experience with RabbitMQ
- Previous experience modernising complex or legacy .NET service estates
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