Freelance Senior Backend Engineer –.NET Core & Cloud Migration

Freelance Senior Backend Engineer – .NET Core & Cloud Migration About the Role

We are seeking an experienced Senior Backend Engineer to support a critical application modernization initiative. This role will focus on migrating an existing .NET application to .NET Core, refactoring backend-to-data-layer logic, and transitioning infrastructure from AWS EC2 to containerized environments.

This is a hands-on engineering role suited for someone who has led or executed similar migrations and is comfortable working independently while collaborating closely with QA, DevOps, and product stakeholders.

Key Responsibilities

• Lead and execute the migration from .NET Framework to .NET Core
• Refactor and modernize backend logic and data access layers
• Refactor and update business logic across the backend layer (API services, controllers, etc.) and data layer (Entity Framework, database interactions, ORM optimizations).
• Proven track record in containerization and DevOps : Docker, Kubernetes, AWS ECS / EKS, or similar.
• Improve application performance, scalability, and maintainability
• Support migration from AWS EC2 to containerized infrastructure (Docker, ECS, Kubernetes, or similar)
• Solid understanding of RESTful APIs, microservices, and cloud-native principles.
• Collaborate with QA to ensure test coverage, regression stability, and data integrity
• Assist with CI / CD pipeline integration and deployment best practices
• Document architectural decisions, migration steps, and technical changes
• Identify risks and propose mitigation strategies during the migration process

Required Qualifications

Nice to Have

Engagement Details

How to Apply

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