Senior .Net Developer

Company Profile: CALPION https://www.calpion.com/

Calpion is an 18-year-old Dallas-headquartered technology firm that offers customers artificial intelligence solutions by building custom deep learning and machine learning algorithms, custom enterprise application development and maintenance, RPA solutions, cloud services, Salesforce consulting, customized invoice management software solutions, and other technology services. We also offer automated bot-driven medical billing services. Our healthcare offering includes a Salesforce platform-based practice management and billing software with automated patient e-statements and a payment portal.

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Job Summary

We are seeking a technically proficient Full Stack Software Developer with a strong background in C#, Microsoft .NET Core, Microsoft ASP.NET, Microsoft Entity Framework,SQL Server (CRUD, Stored Procedures, Views, etc), Mongo DB (NOSQL), Microsoft Blazor (with Bootstrap Blazor)
Web designing (HTML, CSS,, Javascript), and cloud technologies, particularly AWS. This role demands hands-on experience in developing scalable backend systems, API integrations, and cloud storage solutions. The ideal candidate will also bring deep technical understanding of ORM tools like Entity Framework Core and Dapper, along with excellent debugging and performance tuning skills. This is an independent contributor role.

Key Responsibilities

• Design, develop, and maintain web applications using ASP.NET Core, C#, and MVC architecture.
• Create RESTful APIs using ASP.NET Core Web API, enabling integration with frontend applications and third-party services.
• Develop and optimize SQL queries, stored procedures, functions, views, and triggers for both SQL Server and MySQL databases.
• Implement secure, scalable data access using Entity Framework Core (for both SQL Server and MySQL) and lightweight alternatives like Dapper.
• Integrate AWS S3 for file storage/retrieval, manage bucket policies, and handle secure data transfer.
• Build responsive and interactive frontend components using HTML5, CSS3, JavaScript (and optionally React or Angular).
• Follow SOLID principles, design patterns (Repository, Unit of Work, etc.), and clean code practices.
• Participate in code reviews, peer programming sessions, and performance tuning of both backend logic and database queries.
• Collaborate with DevOps team to support CI/CD pipelines and deployments.
• Document technical processes, application flows, and architectural decisions.
• Engage in Agile/Scrum development cycles with participation in sprint planning, retrospectives, and daily stand-ups.

Mandatory Skills

• Programming Languages & Frameworks:
• C#, .NET 6+/ASP.NET Core, MVC
• Web API development (RESTful services)
• Database Technologies:
• SQL Server Full Stack (complex stored procedures, indexing, query tuning)
• MySQL Full Stack (joins, indexing, replication awareness)
• Proficient in writing LINQ queries and working with EF Core migrations
• ORM & Mapping Tools:
• Microsoft Entity Framework Core
• Entity Framework Core for MySQL
• Dapper (micro ORM)
• Automapper (for DTO mapping)
• Cloud Platforms:
• AWS S3 – Bucket configuration, pre-signed URLs, file access policies
• DevOps & Tools:
• Bit bucket
• Visual Studio, SSMS, MySQL Workbench
• Familiarity with CI/CD pipelines (optional but preferred)
• Architecture & Best Practices:
• Experience with layered architecture, clean code principles, and design patterns
• Exposure to microservices and containerized deployments (bonus)
• Others:
• Strong debugging, exception handling, and performance optimization skills
• Experience in Healthcare IT domain (HL7, FHIR, HIPAA compliance) is a strong plus