Full Stack Developer – ASP.NET WebForms & Legacy Systems

Frontline Data Solutions

Singapore · Full-time · Entry

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 (4.8+) 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 Next.js experience
Azure DevOps and CI/CD pipelines
Cloud exposure (especially Azure)

Key Skills

Ranked by relevance

sql javascript devops cicd css

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