EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture.

Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

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
- Integral career opportunities
- Volunteer and community involvement opportunities
- EPAM Employee Groups
- Award-winning culture recognized by Glassdoor, Newsweek and LinkedIn

EPAM is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, sexual orientation, gender identity or expression, disability, protected veteran status, or any other characteristic protected by applicable law.

📌 Full-Stack .NET Developer (Colombia)
🏢 EPAM Systems
📍 Colombia