About the position At Prometeo Talent, we connect top-tier tech and engineering professionals with companies that are shaping the future. With a strong presence across America and Europe, we’re proud to be one of the highest-rated recruitment agencies in the market. We have partnered with a U.S.-based company focused on building internal and client-facing digital products. They are currently developing a secure and user-friendly portal that delivers different experiences depending on user roles and permissions. We are looking for a Senior Full Stack Developer (.NET & Razor Pages) to join their team and support the development of this platform. This role is ideal for a developer who can bridge backend security with a seamless front-end experience using ASP.NET Core and Razor Pages. You will be responsible for building a secure login system, implementing role-based access control, developing dynamic dashboards and forms, and ensuring users only access the data and features relevant to their roles.

Responsibilities

• Build and maintain secure web applications using ASP.NET Core and Razor Pages.
• Implement authentication flows and role-based access control (RBAC) using ASP.NET Core Identity.
• Develop responsive, user-friendly interfaces using Bootstrap 5 and modern UI practices.
• Create dynamic dashboards with KPIs, charts, and data grids.
• Build complex forms with validation, conditional logic, and file upload capabilities.
• Integrate front-end components with RESTful APIs and backend services.
• Work with SQL Server and Entity Framework Core for data access and modeling.
• Optimize application performance using pagination, caching, and asynchronous processing.
• Ensure secure data handling, session management, and protection of sensitive information.

Requirements

• +6 years of experience working with .NET / C# and ASP.NET Core
• +3 years of experience with Razor Pages (or MVC with strong frontend involvement)
• +3 years of experience with Bootstrap and responsive UI development
• Experience implementing authentication and user roles (RBAC)
• Experience working with RESTful APIs
• Solid experience working with SQL and Entity Framework
• Ability to work across both frontend and backend
• Advanced English level

Nice-to-haves

• Familiarity with BI tools (e.g., Power BI)
• Experience with API development and integrations
• Basic understanding of application security best practices
• UI/UX sensibility (attention to layout, usability, and design details)

Benefits

• Days of PTO to recharge wherever you choose.
• 100% remote work—design the work-life balance that fits you best.
• Get hands-on experience with real-world marketing data and tools.
• Collaborate with a global, multidisciplinary team.