Senior .NET Developer — AWS Migration & Modernization

Izertis

Madrid

On-site

EUR 70,000 - 110,000

Full time

8 days ago

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Benefits offered by this job

Permanent contract

22 working days annual leave

Private health insurance

Meal vouchers

Childcare vouchers

Transportation benefits

Free English classes

Benefits platform access

Job summary

Izertis in Madrid is seeking a Senior .NET Developer - AWS Migration to lead the modernization and migration of critical .NET applications from on-premises to AWS. The role combines hands-on C#/.NET engineering with deep AWS architecture and migration expertise to deliver a controlled, high‑quality production platform.

You will analyze existing applications, design new modules, migrate to AWS services, and implement CI/CD, testing, and observability.

Qualifications

Bachelor's Degree in Computer Science, Engineering, or related field, or equivalent professional experience.
8+ years of professional software development experience, including 5+ years of strong C#/.NET development experience in enterprise production systems.
Experience with AWS, migration, and modern .NET technologies (ASP.NET Core, .NET 6/8+).

Responsibilities

Analyze existing .NET apps, hosting, databases, and dependencies to define migration plans.
Design and implement APIs, services, and modernization changes in C#/.NET.
Migrate to AWS services (EC2, ECS/Fargate, EKS, Lambda, API Gateway).
Develop cutover, rollback, validation, and stabilization plans; participate in migration events.
Collaborate with developers, PMs, and operations to deliver production-quality software.