We are seeking a Full-Stack .NET Developer to strengthen application security, support legacy systems, and help modernize services on current .NET. You will work across backend, data, and web UI to remediate vulnerabilities and deliver reliable updates.ResponsibilitiesInvestigate and remediate application security vulnerabilities aligned to OWASP Top 10Analyze SAST/DAST findings and implement secure fixes for prioritized risksMaintain and improve legacy .NET applications and services using ASP.NET MVC and WCFBuild and extend modern .NET services and APIs to support modernization effortsImplement secure data access patterns with ADO.NET and Microsoft SQL ServerUpdate and debug frontend behavior using JavaScript to support full-stack deliveryCollaborate with DevOps to support secure CI/CD workflows and production releasesDocument remediation changes and communicate status during Central Time working hoursRequirementsFull-stack .NET experience (2+ years) with ADO.NET, ASP.NET MVC,



and Microsoft SQL ServerSecurity remediation experience addressing OWASP Top 10 issues such as SQL injection and XSSAvailability alignment with Central Time until 5:00 PM CT for daily collaborationBackend development skills with WCF and service-based architecturesJavaScript proficiency for building and maintaining interactive web interfacesStrong troubleshooting skills for diagnosing issues in legacy codebasesUpper-Intermediate English (B2) proficiency for clear written and spoken communicationNice to haveOctopus DeployOAuth2OpenID ConnectHTMLCSSWe offerInternational projects with top brandsWork with general teams of highly skilled, diverse peersHealthcare benefitsEmployee financial programsPaid time off and sick leaveUpskilling, reskilling and certification coursesUnlimited access to the LinkedIn Learning library and 22,000+ coursesGlobal career opportunitiesVolunteer and community involvement opportunitiesEPAM Employee GroupsAward-winning culture recognized by Glassdoor, Newsweek and LinkedInEPAM 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.
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📌 Full-Stack .NET Developer (Colombia)
🏢 EPAM Systems
📍 Colombia