About Sebastian Van Rooyen | Contra Sebastian Van Rooyen

Sebastian Van Rooyen

Sebastian Van Rooyen

Professional Asp Dotnet Developer -- Web | Desktop | API

New to Contra

Sebastian is ready for their next project!

Johannesburg, South Africa

Work Services About

Johannesburg, South Africa

Meet Sebastian

Followed by Kraig M, HumbleJack ., and arafat50 u

I build apps that just work—fast, clean, and easy to use. From ASP.NET Core and Blazor web apps to WPF desktop tools and APIs, I love turning ideas into real, working software. Need something built, fixed, or improved? Book a free consultation call. Let's make it happen!

Identity verifiedVetted for secure and trusted collaboration.

Rate

$25 - $50/hr

Skills and tools

Frontend Engineer Dot Net Backend Developer AI Agent Developer AI Automation AI Engineer Desktop Apps Development UX Engineer Web Developer AI Agent Designer Winforms/WPF Developer Backend Engineer

Entity Framework

Details

Johannesburg, South Africa

(GMT+2) Eastern European Time (EET), ±3 hours

Professional Working Proficiency in English

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For independents

Contra Pro Manage freelance projects Get verified as an expert Find jobs Get discovered Sign contracts Send invoices Commission-free payments

For companies

For companies Manage team projects Share hiring workspace Post jobs Discover contractors Sign contracts Approve invoices Global payments & tax compliance

Use Cases

For companies For freelancers For creator tools For agencies For VCs

Resources

Partner networks Advertising Challenges Creative Human Data Human Creativity Benchmark Human in the loop API Project-based hiring calculator Guide to flexible hiring Guide for agencies Creator tools awards Customer stories Blog FAQs for freelancers FAQs for companies Referrals

Hire Freelancers

Explore all Top independents Design Engineering Marketing Music & audio Social media Video & animation Product Business consulting & HR Other

Contact

Contact support

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