Full Stack Developer – WebForms
Solliciteren
Plaats
Brussel1000
Brussel
België
Contract
Vooltijds, Onbepaalde duurDatum gepubliceerd
2026-02-15Online to:
2026-04-16EUR 20.00 HOUR
Full Stack Developer – WebForms
- Frontline Data Solutions
- Brussel
- 3 dagen geleden
We are looking for a resilient, detail-oriented Full Stack Developer to join our Technical Support Engineering team. This role focuses on actively developing, supporting, and evolving a mission-critical ASP.NET WebForms platform. You will work hands-on in a large legacy codebase, delivering bug fixes, performance improvements, and new features—while helping document and guide its future modernization.
This is a high-impact role for someone who enjoys deep technical problem-solving and taking ownership of complex systems.
What You'll Do
Develop, maintain, and support a large-scale ASP.NET WebForms application
Troubleshoot and resolve complex production issues using logs, debugging, and root-cause analysis
Write and optimize advanced SQL queries, stored procedures, and views
Build and maintain simple .NET APIs and background jobs
Collaborate with QA and Customer Success to reproduce issues and explain technical causes
Document legacy logic and contribute to ongoing system improvements
Required
What You Bring
3+ years of hands-on experience developing with ASP.NET WebForms
4+ years of experience with C#/VB.NET and .NET Framework or .NET 8
4+ years of advanced SQL development, including performance tuning and production support
Strong front-end fundamentals: HTML, CSS, JavaScript, jQuery
Experience with Hangfire, background processing, and email templating
Strong troubleshooting skills and a patient, methodical problem-solving approach
Ability to clearly explain technical issues to non-technical stakeholders
A mindset oriented toward quality, maintainability, and gradual modernization
Nice to Have
React or experience
Azure DevOps and CI/CD pipelines
Cloud exposure (especially Azure)
This is a high-impact role for someone who enjoys deep technical problem-solving and taking ownership of complex systems.
What You'll Do
Develop, maintain, and support a large-scale ASP.NET WebForms application
Troubleshoot and resolve complex production issues using logs, debugging, and root-cause analysis
Write and optimize advanced SQL queries, stored procedures, and views
Build and maintain simple .NET APIs and background jobs
Collaborate with QA and Customer Success to reproduce issues and explain technical causes
Document legacy logic and contribute to ongoing system improvements
Required
What You Bring
3+ years of hands-on experience developing with ASP.NET WebForms
4+ years of experience with C#/VB.NET and .NET Framework or .NET 8
4+ years of advanced SQL development, including performance tuning and production support
Strong front-end fundamentals: HTML, CSS, JavaScript, jQuery
Experience with Hangfire, background processing, and email templating
Strong troubleshooting skills and a patient, methodical problem-solving approach
Ability to clearly explain technical issues to non-technical stakeholders
A mindset oriented toward quality, maintainability, and gradual modernization
Nice to Have
React or experience
Azure DevOps and CI/CD pipelines
Cloud exposure (especially Azure)