Full-Stack .NET Developer at EPAM Systems – Brazil | Jobyssey

We are looking for a Full-Stack .NET Developer to remediate security vulnerabilities, support legacy applications, and help modernize services across .NET technologies. You will work across the backend, database, and UI while collaborating on secure delivery practices.

Responsibilities

Investigate and remediate security vulnerabilities, including OWASP Top 10 issues and common injection risks
Support and modernize legacy .NET applications built with ASP.NET MVC and related technologies
Develop and enhance .NET services and APIs to improve stability and security
Implement secure data access patterns using ADO.NET with Microsoft SQL Server
Fix and improve front-end behavior using JavaScript in server-rendered web applications
Coordinate with DevOps partners to support secure CI/CD and production deployments
Maintain daily availability until 5:00 PM CT to support collaboration and delivery needs

Requirements

2+ years of .NET development experience with legacy and modern .NET
Hands-on application security experience with OWASP Top 10 and vulnerability remediation
Strong ASP.NET MVC skills for maintaining and enhancing web applications
Solid ADO.NET skills for secure and efficient data access
Strong Microsoft SQL Server skills including secure query design
Practical JavaScript skills for front-end feature development and fixes
Working WCF knowledge for supporting and updating service integrations
Strong troubleshooting skills for analyzing issues in large legacy codebases
Clear communication skills for collaborating with engineering and DevOps peers
English proficiency Upper-Intermediate (B2) for daily written and spoken communication

Nice to have

OAuth2 knowledge for secure authorization flows
OpenID Connect knowledge for authentication integration
Octopus Deploy experience for deployment automation
HTML skills for maintaining and improving UI pages
CSS skills for styling fixes and incremental UI improvements

Benefits

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

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Responsibilities

Requirements

Nice to have

Benefits