.NET Migration Lead (Freelance - Project Based)

Key Responsibilities:

This role is a freelance, project-based contract. That requires at least 2 days working from the office per week.

• Analyze existing source code written in .NET Framework 4.5 and assess compatibility with .NET Core 9.0.

• Develop and execute a comprehensive migration strategy, including planning, testing, and phased rollout.

• Refactor code, update libraries, and eliminate deprecated APIs for full compatibility with .NET Core.

• Replace or migrate legacy components (e.g., WCF, Web Forms, old NuGet packages) to modern equivalents (e.g., gRPC, Razor Pages, ASP.NET Core).

• Optimize application performance, scalability, and security throughout the migration process.

• Collaborate with QA teams to validate migrated applications through automated and manual testing.

• Work closely with DevOps to update build pipelines (CI/CD) compatible with .NET Core tooling.

• Document all technical changes, migration steps, and known issues/resolutions.

• Mentor and support internal developers on modern .NET Core development practices.

• Stay updated with the latest .NET technologies, migration tools, and industry trends.

Requirements:

• Bachelors degree in Computer Science, Software Engineering, or a related field.

• 5+ years of experience in .NET development, including at least 2 years working with .NET Core/.NET 5+.

• Proven experience migrating large-scale enterprise applications from .NET Framework to .NET Core.

• Strong proficiency in C#, ASP.NET, Entity Framework, and Web API.

• Familiarity with modern frontend frameworks (e.g., React, Angular) is a plus.

• Solid knowledge of dependency injection, middleware, logging, and configuration patterns in .NET Core.

• Experience with tools such as Upgrade Assistant, .NET Portability Analyzer, and API Compatibility Checkers.

• Proficiency in version control (e.g., Git) and CI/CD pipelines (e.g., Azure DevOps, GitHub Actions).

• Good understanding of Windows and Linux hosting environments.

• Excellent problem-solving skills and attention to detail.

• Strong communication and documentation skills.

Information :

• Company : Colliers
• Position : .NET Migration Lead (Freelance - Project Based)
• Location : Jakarta Selatan
• Country : ID