Location: Latin America, REMOTEProject Overview: The customer, is a healthcare company, seeks to upgrade a large legacy application used in electronic health records (EHR) for oncology. The existing system is a monolithic application initially built using the classic .NET Framework, ranging from .NET 2.0 to .NET 4.7.2. It includes around 300 projects, with significant parts dedicated to data access, business models, and services, all tangled in a complex manner. The application is critical as it supports clinicians in recording and accessing vital patient data, and any system downtime can have severe consequences.Project Goals:Modernization: Migrate the application to a more modern .NET environment, preferably .NET 8.Maintain Functionality: Ensure the application continues to function during the migration, as it is currently live and essential to healthcare operations.Partial Upgrades: Focus on improving the backend and reducing dependencies without rewriting the entire application.Technical Challenges: Resolve issues with legacy ASP.NET, manage package version collisions, and refactor components to make them compatible with .NET Standard 2.0 and .NET 8.Frontend Considerations: Although primarily backend-focused, the application uses ReactJS and acts as a message hub for various services.Technical Environment:Backend: Classic ASP.NET, transitioning to .NET 8.Frontend: ReactJS.Database: SQL Server, utilizing Dapper for data access.Cloud Platform: AWS, but Azure could be considered due to Microsoft's ecosystem benefits.Key Responsibilities:Analyze and understand the current legacy ASP.NET application architecture.Develop strategies to migrate parts of the application to .NET 8, ensuring compatibility with existing systems.Collaborate closely with team members to identify small, impactful changes that can modernize the application.Optimize backend services, refactor code to use modern .NET practices, and address technical debt.Perform profiling and load testing to identify performance bottlenecks.Ensure that any changes minimize disruption to the live production environment.Participate in planning and coordinating with other teams for incremental upgrades and refactoring efforts.Required Skills and Experience:.NET Expertise: Extensive experience with classic ASP.NET and modern .NET Core/.NET 8, including transitioning legacy applications to newer frameworks. (+7 years of experience)Backend Development: Strong skills in backend development, including understanding HTTP contexts, multi-threading, and dependency injection.SQL Server: Proficient in writing and optimizing SQL queries, familiar with SQL Server features like temporal tables and raw versions.Data Access: Experience with ORM tools like Dapper and inline SQL code.Microservices: Familiarity with microservices architecture and designing APIs.Cloud Platforms: Experience with AWS or Azure cloud services, containers & kubernetes services, such as EKS or AKS.Coding: git(gitlab) and JetBrains RiderProblem Solving: Ability to identify and solve complex technical issues, especially in a live production environment.Collaboration: Strong communication skills to work effectively with cross-functional teams and provide technical guidance.Preferred Qualifications:Experience in the healthcare domain, particularly with electronic health records (EHR) systems.Knowledge of front-end technologies like ReactJS is a plus but not mandatory.Familiarity with DevOps practices and tools.Personality Traits:Detail-oriented and analytical thinker.Proactive problem solver who can work independently and as part of a team.Strong communicator, capable of explaining technical concepts to non-technical stakeholders.Time Zone and Availability:Time Zone: Ideally located in a time zone that aligns well with U.S. Eastern Time (ET) to facilitate collaboration with the team.Availability: Flexible work hours, but must be available for key meetings and collaboration sessions with the team. Typical core hours might be between 9 AM and 5 PM ET, but some flexibility is possible.This role requires a candidate who can handle the intricacies of migrating a critical legacy system to a modern platform while maintaining operational integrity. The ideal candidate will be adept at navigating complex technical environments and driving significant improvements to ensure the system's future reliability and efficiency.Hiring Process:Intro call with a RecruiterTech interview with the Customertimes teamTwo Customer interviews (live coding, behavioral interview)Offer