Senior/Lead .NET Software Engineer (AWS)

We are seeking a Senior/Lead .NET Software Engineer (AWS) to join an AI agentic modernization engagement leveraging Kiro and Amazon Transform. The role focuses on modernizing legacy .NET applications, migrating them to cloud-native architectures on AWS, and ensuring seamless database compatibility with PostgreSQL. The successful candidate will be comfortable with some overlap with the US EST time zone.Please note that for positions in Ukraine, we only consider candidates who are currently based in Ukraine or plan to return in the near future. Remote work is available only from Ukraine.Use Kiro and Amazon Transform to accelerate code analysis, refactoring and migration tasks; validate and optimize tool-generated outputsDesign and develop high-performance, scalable applications using .NET Core with a microservices architectureMigrate and refactor legacy .NET Framework (Windows) applications to .NET Core (Linux), ensuring functional parity and improved performanceModify and optimize application code and stored procedures to ensure compatibility with PostgreSQL / Aurora PostgreSQL, following AWS development standardsImplement unit tests and performance tests to ensure application stability, responsiveness and production readinessPartner with database engineers to ensure seamless integration between application code and PostgreSQLCollaborate closely with AWS ProServe consultants on validation and optimizationApply AWS Well-Architected Framework principles across security, reliability, performance efficiency and operational excellenceCapture key findings, migration strategies, code conversion patterns and technical validation results for long-term maintainability and knowledge transfer