Full-Stack.NET Developer

About the Position

We are seeking a Full-Stack.NET Developer to strengthen application security, support legacy systems, and help modernize services across.NET Framework and modern.NET. You will work across backend, database, and frontend tasks.

Responsibilities

• Investigate and remediate application security vulnerabilities including OWASP Top 10 findings
• Analyze SAST/DAST results and implement secure code fixes for SQL injection and XSS risks
• Support and modernize legacy .NET applications using ASP.NET MVC and WCF services
• Build and enhance.NET Web APIs and backend services with secure patterns
• Implement secure database interactions using ADO.NET with Microsoft SQL Server
• Update frontend features and fixes using JavaScript alongside existing UI code
• Coordinate with DevOps to enable secure CI/CD and reliable production deployments
• Document remediation work, modernization changes, and security best practices

Requirements

• Full-stack.NET experience (2+ years) with production applications
• Security remediation experience addressing OWASP Top 10 risks
• Legacy application experience with ASP.NET MVC, WCF, and large codebases
• Modern.NET experience with Web APIs and service-oriented design
• Strong database skills with Microsoft SQL Server and secure data access
• Solid programming skills in JavaScript for frontend integration
• Strong troubleshooting skills with root-cause analysis and debugging
• Clear communication skills for coordinating fixes and priorities
• Upper-Intermediate English proficiency (B2, Upper-Intermediate)

Nice to Have

• OAuth2 implementation experience
• OpenID Connect (OIDC) and token-based auth knowledge
• Octopus Deploy experience
• Strong HTML and CSS skills
• jQuery maintenance experience

We Offer

• International projects with top brands
• Work with global teams of highly skilled, diverse peers
• Healthcare benefits
• Employee financial programs
• Paid time off and sick leave
• Upskilling, reskilling, and certification courses
• Unlimited access to the LinkedIn Learning library and 22,000+ courses
• Global career opportunities
• Volunteer and community involvement opportunities
• EPAM Employee Groups
• Award-winning culture recognized by Glassdoor, Newsweek, and LinkedIn

Locations

• Brazil
• Mexico
• Colombia
• Remote