Excel Nearshore is seeking a Senior Software Developer to join a leading technology services company that helps organizations modernize their software platforms, scale development capabilities, and build innovative digital solutions. In this role, you will serve as the technical backbone for application modernization initiatives, driving the design, development, and evolution of the client’s enterprise ecosystem. This role focuses heavily on crafting high-performance web applications using the Microsoft stack, specifically spearheading the migration of legacy, JavaScript-heavy front-ends over to modern, component-based architectures. You will anchor code analysis, performance tuning, and architectural discussions to ensure client’s solutions are secure, scalable, and highly resilient.
This role is critical to achieving long-term application modernization and tech stack upgrade goals. Operating within a high-velocity Scrum team, you will collaborate with architects, product owners, and QA to translate high-level directions into production-ready software at the end of every sprint. Your technical leadership will directly impact system reliability and set the standard for modern .NET engineering across the organization.
This is a fully remote and full-time position from Costa Rica, in payroll with benefits.
- Design, Develop, and Optimize secure, scalable, and high-performance web applications leveraging .NET, C#, and Blazor.
- Lead and Execute complex migration strategies, moving legacy client-side frameworks (e.g., AngularJS, jQuery) to cutting-edge Blazor architectures.
- Anchor tech stack upgrades, code analysis, and tool evaluations, while establishing and documenting engineering patterns and standards.
- Collaborate with cross-functional PODs (Architects, Product Owners, and QA) to take high-level directions and break them down into execution plans, Stories, and Tasks.
- Troubleshoot and Resolve deep, complex technical issues across both backend business logic and frontend component interactions.
- Deliver clean, maintainable, and production-ready code by the end of each Sprint, ensuring strict adherence to unit testing and security standards.
- 5+ years of professional experience in .NET / .NET Core development (non-negotiable).
- Advanced English proficiency (written and spoken) with excellent communication skills to collaborate in an agile, cross-functional environment.
- Blazor Expertise: Solid experience working with component-based UI frameworks, specifically .NET Blazor development.
- Data Layer Mastery: Strong hands-on experience with Microsoft SQL Server and database design.
- AI-Assisted Development Fluent: Comfort using next-generation tools like Microsoft Copilot, Cursor, or similar environments to accelerate code exploration and productivity.
- Testing Rigor: Demonstrable knowledge and commitment to unit testing backend business logic and validating web standard compatibility (HTML5, CSS3, JavaScript).
- Compliance Ready: Willingness to complete mandatory specialized training, including HIPAA compliance / awareness training.
- Education: University degree in Computer Science, Software Engineering, or a related discipline.
Nice to Have
- Hands-on experience developing with .NET 10 features and optimization paradigms.
- Deep experience building and securing RESTful web services and API integrations.
- Direct experience with cloud deployment strategies for modernized .NET applications.
- Prior experience in the healthcare tech sector or working with heavily regulated, data-sensitive applications.
Aarón Acuña Cordero | Human Talent Director
aaron.acuna@excelnearshore.com
