Full Stack Developer (ASP.NET Web Forms)

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.

What You’ll Do

• Application Development & Maintenance: Develop, maintain, and enhance a large‑scale ASP.NET WebForms application, ensuring stability, performance, and long‑term reliability across the full stack.
• Background Processing & Automation: Design, develop, and support .NET console applications used for background processing, automation tasks, and system‑level workflows.
• Production Support & Troubleshooting: Troubleshoot and resolve complex production issues through log analysis, debugging, and thorough root‑cause investigation.
• Database Development & Optimization: Write and optimize advanced SQL queries, stored procedures, and views that support critical functionality and improve database performance.
• API Development & Integration: Build and maintain simple .NET APIs and background jobs that enable system integrations and automated internal processes.
• Cross‑Team Collaboration: Collaborate with QA and Customer Success to reproduce issues, communicate technical findings, and ensure smooth deployment of fixes and enhancements.
• Documentation & Continuous Improvement: Document legacy logic, clarify system behavior, and contribute to ongoing improvements that increase maintainability and reduce technical debt.

Skills You’ll Need

Required

• ASP.NET WebForms Experience: 3+ years of hands‑on experience developing and supporting applications built with ASP.NET WebForms.
• .NET Framework Expertise: 3+ years of experience working with C#/VB.NET and the .NET Framework, including versions 4.6.1, 4.7.2, and 4.8+.
• Console Application Development: Experienced in creating and maintaining .NET console applications used for automation, background processing, and internal tooling.
• Advanced SQL Development: 4+ years of advanced SQL experience, including writing complex queries, performance tuning, and supporting production environments.
• Front‑End Skills: Strong foundation in HTML, CSS, JavaScript, and jQuery with the ability to build and troubleshoot WebForms front‑end components.
• Troubleshooting & Problem‑Solving: Demonstrates strong debugging skills with a patient, methodical approach to identifying and resolving issues.
• Stakeholder Communication: Able to clearly explain technical concepts, constraints, and solutions to non‑technical team members and stakeholders.
• Quality & Modernization Mindset: Committed to writing maintainable code, improving system reliability, and contributing to gradual modernization initiatives.

Nice to Have

• Modern Front‑End Frameworks: Experience with React or Next.js.
• DevOps & Automation: Familiarity with Azure DevOps and CI/CD pipelines.
• Cloud Technologies: Exposure to cloud platforms, especially Azure.
• Legacy Modernization: Experience modernizing older .NET / WebForms systems.
• Application Logging: Knowledge of logging frameworks and Windows‑based .NET applications.
• Background Processing: Experience with Hangfire, background jobs, and email templating.
• Modern .NET: Exposure to .NET Core / .NET 6+ development.

What You’ll Get

• Leadership & Growth: Work directly with senior leadership, reporting to the CTO, in an autonomous and entrepreneurial culture with zero bureaucracy.
• Remote Work & Flexibility: Frontline is a fully distributed organization.
• Competitive Compensation