Senior Application Support Engineer Jobs in Arizona

Job Description -

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Senior Application Support L2 / QA Auto Testing

Location: Hybrid # days a week in Mesa, AZ office required (2 or 3 days in office per week) Try to send local candidates

Duration: 6+ Months

Overview

Position: Seeking a candidate with a strong application support background, complemented by strong QA and development experience.

• Experience: 8+years in the below
• Technologies: Selenium, Playwright, .Net Core, React, C#, TypeScript, Azure, CI/CD Pipeline, AI code generation tools (e.g., Copilot, Claude) and SQL
• Skills: Excellent communication, Problem-solving, Debugging, Triaging, Cross functional collaboration, Monitoring, and Root cause Analysis.
• Primary Scope: Application Monitoring, L2 Production Support, Release Support, Deployments, API Testing, Web Site/Application Testing , Security Testing, Batch System Testing, Performance Testing, Database testing and Integration Testing, Debugging the code and identifying the root cause for production incidents.

We are seeking a Senior SDET / Application Support Engineer who is equally strong in QA automation/testing and L2 application support. This role is a true 50/50 hybrid, requiring senior-level depth in both areas. The ideal candidate brings strong debugging skills, hands-on coding proficiency, and the ability to own production incidents end-to-end while also contributing to UI, API, and full-stack testing.

This position does not require building automation frameworks from scratch, but it does require professional-level coding skills to debug application code effectively and support existing automation.

Key Responsibilities: Will need 8+ years of experience in the following:

Application Support & Production Ownership (50%)

• Own all production incidents, including triage, RCA- Root Cause Analysis, and coordination with development teams.
• Perform L2 Application/Production Support for critical applications; incidents may occur at any time.
• Debug application code (C#, .NET Core, React, TypeScript) to identify root cause and provide detailed findings to developers.
• Monitor applications using Azure Monitor and App Insights.
• Participate in minimal on-call rotation.
• Delegate incident tasks to other teams when appropriate.
• Support batch systems, performance issues, security concerns, and integration failures.
• Cross functional collaboration to ensure stability across Dev, QA, UAT, and Prod environments.

Testing & QA Automation (50%)

• Execute and maintain automation using Selenium and Playwright (no framework building required).
• Perform Web Site / Web Application Testing across frontend and back-end components.
• Perform Testing for UI, API, full-stack, database, integration, batch, performance, and security.
• Write and debug automation code as needed to support testing activities.
• Work as part of the team on performance, security, and integration testing (shared ownership).
• Use AI tools (Copilot, Claude) to accelerate testing and debugging workflows.

Release, Deployment & CI/CD

• Own and perform application deployments.
• Run CI/CD pipelines and deploy code; triage pipeline issues and collaborate with developers to resolve them.
• Validate releases in lower environments as part of sprint work.

Required Technical Skills

• Professional-level coding in C#, .NET Core, TypeScript, and React (required for deep debugging).
• Strong experience with Selenium and Playwright.
• Hands-on experience with Azure, including Azure Monitor and App Insights.
• Solid understanding of CI/CD pipelines (running builds, deployments, basic triage).
• Strong SQL skills for database testing and investigation.
• Familiarity with AI code-generation tools (Copilot, Claude).

Required Soft Skills

• Excellent communication and cross-functional collaboration.
• Strong problem-solving and analytical thinking.
• Ability to triage complex issues quickly and accurately.
• Ability to work proactively (quality improvements) and reactively (incident response).
• Strong ownership mindset and ability to manage high-impact production issues.

What Makes This Role Unique

• True 50/50 hybrid: Senior in both SDET and L2 support.
• Hands-on coding required, but no framework building.
• Owns deployments and production incidents, not just testing.
• Full-stack testing across UI, API, database, batch, performance, and security.
• High visibility role with direct impact on production stability and product quality.