Senior .NET Full-Stack Engineer - Modernize & Secure Apps

EPAM Systems; México; On-site; MXN 600,000 - 1,000,000; Full time

Benefits offered by this job

Healthcare benefits

Paid time off

Upskilling courses

LinkedIn Learning access

Global career opportunities

Volunteer opportunities

Job summary

EPAM Systems is seeking a Senior Full-Stack .NET Developer to strengthen and modernize enterprise applications by remediating security vulnerabilities and supporting legacy systems while building modern .NET services.

You will work across backend, data, and frontend layers and partner with DevOps to deliver secure releases. The role requires strong knowledge of ASP.NET MVC, WCF, SQL Server, and JavaScript for frontend integration.

Qualifications

• 3+ years full-stack .NET development experience.
• Strong .NET security remediation experience with OWASP Top 10.
• Advanced troubleshooting skills for large legacy codebases.
• Proven project ownership across maintenance and modernization efforts.
• Solid C# skills with .NET Framework and modern .NET (6/8+).
• Hands-on ASP.NET MVC, WCF, and ADO.NET experience.
• Strong SQL Server skills with secure data access practices.
• Practical JavaScript skills for frontend integration.
• Upper-Intermediate English proficiency (B2).

Responsibilities

• Investigate and remediate security vulnerabilities, including OWASP Top 10 findings.
• Harden applications against SQL injection, XSS, and dependency risks.
• Maintain and modernize legacy .NET applications using ASP.NET MVC and WCF.
• Build and enhance ASP.NET Core Web APIs and modern .NET services.
• Implement secure data access with Microsoft SQL Server and ADO.NET.
• Develop and refine frontend features using JavaScript and related web technologies.
• Collaborate with DevOps to support secure CI/CD and production deployments.
• Coordinate work to ensure daily availability until 5:00 PM CT.

Skills

Full-stack .NET

OWASP Top 10

C# skills

ASP.NET MVC

WCF

ADO.NET

SQL Server

JavaScript

English B2

Legacy code troubleshooting

Project ownership

Tools

Octopus Deploy

Job description

EPAM Systems is seeking a Senior Full-Stack .NET Developer to strengthen and modernize enterprise applications by remediating security vulnerabilities and supporting legacy systems while building modern .NET services.

You will work across backend, data, and frontend layers and partner with DevOps to deliver secure releases. The role requires strong knowledge of ASP.NET MVC, WCF, SQL Server, and JavaScript for frontend integration.