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# NET Developer - AWS Migration

- **Company:** IZERTIS S.A
- **Location:** Madrid, Spain
- **Contract:** Permanent contract
- **Skills:** ASP.NET, JavaScript (Programming Language), .NET Framework, Microsoft Windows, Application Programming Interfaces (APIs), Amazon Web Services, Amazon Elastic Compute Cloud, Confluence, JIRA, Build Automation, Automation of Tests, C Sharp (Programming Language), Cloud Computing, Code Review, Databases, Continuous Integration, Data Security, Serialization, Relational Databases, Database Connection, Dependency Injection, Software Design Patterns, Linux, File Systems, Entity Framework, Github, Internet Information Services (IIS), Microsoft SQL Server, Object-Oriented Software Development, Oracle (Applications), Performance Tuning, Linux Containers, Software Engineering, Systems Integration, TypeScript, Web Services, AI Coding Agents, Git, Database Migration, Solid Principles, Infrastructure Automation Frameworks, Information Technology, AWS Fargate, Windows Services, Asynchronous Programming, Api Gateway, Restful APIs, Amazon Simple Queue Service (SQS), Code Restructuring, Software Version Control, Serverless Computing, Web Api, Microservices
- **Published:** November 6, 2026
- **Apply:** https://www.adzuna.es/details/5954163126

## About the Role

* 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.
 * Strong Cexperience with .NET 6/8+ and ASP.NET Core; solid working knowledge of .NET Framework applications and legacy modernization considerations.
 * Strong experience with REST APIs, Web APIs, dependency injection, asynchronous programming, background services, serialization, authentication/authorization, and automated testing.
 * Strong knowledge of OOP, SOLID principles, design patterns, service-oriented/microservice architectures, and distributedsystem troubleshooting.
 * Strong experience with SQL Server and/or Oracle; practical experience with Entity Framework/EF Core or equivalent dataaccess approaches.
 * Experience supporting IIS-hosted applications, Windows services, and web services, with the ability to migrate or redesign them for AWS-hosted environments.
 * Hands-on experience with Git-based source control, code reviews, build automation, and CI/CD pipelines.
 * Extensive and deep AWS experience meeting all requirements in Section 4, including direct on-premises-to-AWS migration delivery.
 * Strong written and verbal communication skills, with a proven record of producing estimates, technical designs, migration runbooks, and implementation documentation.
 * Ability to work independently or as part of a cross-functional team and deliver production-quality software within tight schedules.

Nice-to-Have Skills

 * Experience migrating .NET Framework/Windows workloads to .NET 6/8+, Linux containers, ECS/Fargate, or EKS.
 * Experience with AWS Lambda for .NET, API Gateway, SQS/SNS, EventBridge, Step Functions, or serverless integration patterns.
 * Experience with AWS DMS/SCT, SQL Server/Oracle migrations to RDS/Aurora, and database cutover strategies.
 * Experience with JavaScript/TypeScript and modern web front-end integration where applicable.
 * Prior experience delivering technology solutions within Capital Markets or Investment Banking is strongly preferred, particularly experience supporting trading, securities, Equities, Fixed Income, or front-to-back processing environments.
 * Experience with Jira, Confluence, GitHub, and approved AI-assisted software development tools.

## Description

* Analyze existing .NET applications, IIS/Windows hosting, services, scheduled jobs, integrations, databases, certificates, file shares, and infrastructure dependencies to define migration plans.
 * Design and implement new modules, APIs, services, and modernization changes using Cand current .NET technologies.
 * Modernize legacy .NET Framework workloads where practical, including migration toward .NET 6/8+, ASP.NET Core, Linux/container hosting, or AWS managed services.
 * Replatform or refactor applications for EC2, ECS/Fargate, EKS, Lambda, API Gateway, or other AWS services based on workload requirements.
 * Migrate Windows/web services, background processes, configuration, secrets, file processing, database connectivity, and integrations to secure AWS patterns.
 * Design and support relational database migration, connection resiliency, ORM/data access patterns, and application compatibility for cloud-hosted databases.
 * Implement automated testing, CI/CD, infrastructure automation, cloud observability, performance tuning, and production support.
 * Develop detailed cutover, rollback, validation, and stabilization plans and participate hands-on in migration events.
 * Work with developers and project management to understand requirements, estimate work, manage technical dependencies, and deliver production-quality software.