Senior Full-Stack .NET Developer (Security & Modernization)
We are looking for a Senior Full-Stack .NET Developer experienced with both legacy .NET Framework and modern .NET (.NET 6/8+). The primary focus is security vulnerability remediation, legacy application support, and modernization.
Responsibilities
- Investigate and remediate application security vulnerabilities, including OWASP Top 10, SAST/DAST findings, SQL injection, XSS, and dependency risks
- Maintain and modernize legacy ASP.NET Web Forms, MVC, WCF, and ASMX applications
- Develop and enhance ASP.NET Core Web APIs and modern .NET services
- Work with SQL Server, ADO.NET, EF Core/Dapper, ensuring secure data access
- Support frontend development using HTML, CSS, JavaScript/TypeScript, jQuery, and modern SPA frameworks
- Collaborate with DevOps to support secure CI/CD and production deployments
Requirements
- 3+ years of full-stack .NET development experience
- Expertise in C#, .NET Framework, and SQL Server
- Proficiency in ASP.NET Web Forms and MVC
- Background in .NET 6/8+, ASP.NET Core, and REST APIs
- Understanding of dependency injection
- Practical application security experience and knowledge of OWASP Top 10
- Experience with React, Angular, or Vue.js
- Strong troubleshooting skills and ability to work with large legacy codebases
- English proficiency at an Upper-Intermediate level (B2) or higher
Nice to have
- Experience with TeamCity, Octopus Deploy, and IIS
- Knowledge of OAuth2, OIDC, and JWT
- Skills in HTML, CSS, and jQuery
