Full-Stack .NET Developer (Security & Modernization)

EPAM Systems; Colombia; On-site; COP 70,000,000 - 120,000,000; Full time

Benefits offered by this job

Healthcare benefits

Paid time off and sick leave

Upskilling and certification courses

LinkedIn Learning access

Job summary

EPAM Systems in Colombia is seeking a Full-Stack .NET Developer to join our global delivery team. You will contribute to security remediation, legacy application support, and modernization efforts under the guidance of senior team members.

You will assist in investigating vulnerabilities (OWASP Top 10, SAST/DAST), modernize legacy ASP.NET Web Forms, MVC, WCF, and ASMX apps, and develop ASP.NET Core Web APIs. Collaboration with DevOps on CI/CD and production deployments is expected.

Qualifications

• 2+ years of full-stack .NET development experience.
• Solid knowledge of C#, .NET Framework, and SQL Server.
• Experience with ASP.NET Web Forms and MVC.
• Familiarity with .NET 6/8+, ASP.NET Core, and REST APIs.
• Understanding of dependency injection and secure coding practices.
• Experience with at least one frontend framework (React/Angular/Vue) and jQuery.
• English proficiency at Intermediate level or higher (B1+).

Responsibilities

• Assist in investigating and remediating application security vulnerabilities (OWASP Top 10, SAST/DAST).
• Support and modernize legacy ASP.NET Web Forms, MVC, WCF, and ASMX apps.
• Develop and enhance ASP.NET Core Web APIs and modern .NET services.
• Work with SQL Server using ADO.NET, EF Core or Dapper with secure data access practices.
• Contribute to frontend development with HTML, CSS, JavaScript/TypeScript, and jQuery; participate in SPA frameworks.
• Collaborate with DevOps on CI/CD processes and production deployments.

Skills

C#/.NET

.NET Framework

ASP.NET Web Forms

ASP.NET MVC

ASP.NET Core

REST APIs

SQL Server

JavaScript/TypeScript

React/Angular/Vue

OWASP Top 10

Tools

TeamCity

Octopus Deploy

IIS

Job description

We are looking for a Full-Stack .NET Developer with experience in both legacy .NET Framework and modern .NET (.NET 6/8+). You will contribute to security vulnerability remediation, legacy application support, and modernization efforts under the guidance of senior team members.ResponsibilitiesAssist in investigating and remediating application security vulnerabilities, including OWASP Top 10, SAST/DAST findings, SQL injection, XSS, and dependency risksSupport and help modernize legacy ASP.NET Web Forms, MVC, WCF, and ASMX applicationsParticipate in the development and enhancement of ASP.NET Core Web APIs and modern .NET servicesWork with SQL Server, ADO.NET, EF Core/Dapper, following secure data access practicesContribute to frontend development using HTML, CSS, JavaScript/TypeScript, jQuery, and modern SPA frameworksCollaborate with DevOps engineers on CI/CD processes and production deploymentsRequirements2+ years of full-stack .NET development experienceSolid knowledge of C#, .NET Framework, and SQL ServerWorking experience with ASP.NET Web Forms and MVCFamiliarity with .NET 6/8+, ASP.NET Core, and REST APIsUnderstanding of dependency injectionBasic application security awareness and familiarity with OWASP Top 10Experience with at least one of the following: React, Angular, or Vue.jsGood troubleshooting skills and willingness to work with legacy codebasesEnglish proficiency at an Intermediate level or higher (B1+)Nice to haveExposure to TeamCity, Octopus Deploy, or IISBasic understanding of OAuth2, OIDC, and JWTSkills in HTML, CSS, and jQueryWe offerInternational projects with top brandsWork with global 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.