Senior .NET Developer – AWS Cloud Migration

Corus Consulting an Alten Company; México; On-site; MXN 1,200,000 - 2,000,000; Full time

Job summary

Corus Consulting an Alten Company is seeking a Senior .NET Developer with extensive experience in enterprise application development, legacy modernization, and hands-on migration of applications from On-Premises environments to AWS. The ideal candidate will combine strong C#/.NET engineering skills with deep AWS architecture, cloud modernization, and production migration expertise.

The role focuses on building REST APIs, microservices, and data integration while ensuring security, reliability,

Qualifications

• 8+ years of software development experience, including 5+ years with C#/.NET.
• Strong proficiency in C#, .NET 6/8+, ASP.NET Core, and .NET Framework.
• Experience building REST APIs, Web APIs, microservices and distributed apps.
• Solid SQL Server and/or Oracle, EF Core, and database integration.
• Experience with IIS, Windows Services, and legacy modernization.
• Hands-on in at least 2 end-to-end On-Premises to AWS migrations.

Skills

C#/.NET

ASP.NET Core

REST APIs

Microservices

SQL Server/Oracle

EF Core

IIS/Windows Services

AWS migration

AWS architecture

Tools

Terraform

CloudFormation

AWS CDK

Jenkins

GitHub Actions

GitLab CI

CodePipeline/CodeBuild

Docker

Kubernetes

Job description

Working Hours: Must be available to work during U.S. Eastern Time (ET) business hours

We are looking for a Senior .NET Developer with extensive experience in enterprise application development, legacy modernization, and hands-on migration of applications from On-Premises environments to AWS.

The ideal candidate will combine strong C#/.NET engineering skills with deep AWS architecture, cloud modernization, and production migration expertise.

Required Technical Skills:

• 8+ years of software development experience, including 5+ years working with C#/.NET.
• Strong proficiency in C#, .NET 6/8+, ASP.NET Core, and .NET Framework.
• Experience developing REST APIs, Web APIs, Microservices, and distributed applications.
• Strong knowledge of SQL Server and/or Oracle, Entity Framework/EF Core, and database integration.
• Experience with IIS, Windows Services, and legacy application modernization.
• Proven hands-on participation in at least 2 end-to-end On-Premises to AWS migration projects, including migration execution, production cutover, and stabilization.

Mandatory AWS Expertise (Hands-on):

• Networking: VPC, Subnets, Route Tables, Security Groups, NACLs, Route 53, Load Balancers, and Hybrid Connectivity.
• Compute & Hosting: EC2, ECS/Fargate, EKS, Lambda, Auto Scaling, and API Gateway.
• Databases: RDS/Aurora and experience with DynamoDB, ElastiCache, OpenSearch, or managed messaging services.
• Security: IAM, KMS, Secrets Manager/Parameter Store, CloudTrail, CloudWatch, and encryption.
• Infrastructure as Code: Terraform (preferred), CloudFormation, or AWS CDK.
• CI/CD: Jenkins, GitHub Actions, GitLab CI, AWS CodePipeline/CodeBuild, or equivalent tools.
• Monitoring & Operations: CloudWatch, troubleshooting, high availability, disaster recovery, and performance optimization.

Nice to Have:

• Migration from .NET Framework to .NET 6/8+.
• Docker, Kubernetes, ECS/Fargate, or EKS.
• AWS Lambda for .NET, SQS/SNS, EventBridge, or Step Functions.
• AWS DMS/SCT and SQL Server/Oracle migrations to RDS/Aurora.
• Experience in Banking, Financial Services, or Capital Markets.
• AWS certifications.

Important: We are seeking a hands-on developer with real AWS migration experience, not profiles focused exclusively on cloud infrastructure, architecture oversight, or project management.