NET 6/7/8/10 Experience Required 10 Years .NET REST/WEB API Development Experience Required 5 Years Entity Framework Core and LINQ and async/await patterns Experince Required 10 Years Solid software design: SOLID, design patterns, domain modeling, layered/clean architecture, dependency injection Required 5 Years Angular 17+, Typescript and Node.js experience Required 5 Years Strong relational database skills; PostgreSQL strongly preferred (Oracle/SQL Server acceptable) schema design, indexing, query tuning, stored proc Required 5 Years unit/integration/regression testing frameworks; TDD/mocking Required 5 Years Git and static code analysis (SonarQube) Required 5 Years Docker containerization and CI/CD pipeline experience (AWS CODEPIPELINE OR GitHub Actions) Required 3 Years AWS cloud native applications (S3, SNS, SQS, ECS, RDS, EC2, Lambda) Required 3 Years . We are modernizing a large, mission-critical Honeywell Bull mainframe benefits system (FAMIS) converting ~1.5M lines of COBOL and ~160K lines of JCL to C#/.NET , migrating an IDS-II hierarchical database to PostgreSQL , and deploying on AWS .