Senior Application Support Engineer – L3 / .NET / SQL

We are looking for a Senior Application Support Engineer with strong experience providing L3 and BAU support for production web applications.

This is an application support-focused position rather than a traditional software development role. The ideal candidate is highly skilled in troubleshooting complex production issues, working with SQL Server, analyzing application behavior, performing root cause analysis, and debugging .NET/C# applications when required.

You will collaborate with US-based development, infrastructure, and business teams, so advanced English and availability to overlap with US working hours are required.

What You'll Do

• Provide L3 and BAU production support for web-based applications.

• Own complex incidents and application issues through resolution.

• Troubleshoot application errors, bugs, performance issues, and production incidents.

• Perform root cause analysis (RCA) and implement preventive solutions for recurring issues.

• Work extensively with Microsoft SQL Server to investigate and resolve application and data-related problems.

• Analyze and troubleshoot stored procedures, functions, triggers, views, and queries.

• Debug existing applications built with C#, ASP.NET, .NET Framework and .NET Core.

• Implement or collaborate on bug fixes when necessary.

• Support and troubleshoot SSRS reports and SQL-based reporting processes.

• Monitor application performance and identify optimization opportunities.

• Collaborate with development and infrastructure teams on complex technical incidents.

• Participate in application updates, patches, testing, and deployments.

• Document troubleshooting procedures, solutions, SOPs, and application support processes.

• Communicate incident status and resolutions effectively to technical and business stakeholders.

Requisitos

• 4–8 years of professional IT experience.

• Strong hands-on experience in L3 Application Support / Production Support / BAU Support.

• Proven experience supporting web-based applications in production environments.

• Advanced knowledge of Microsoft SQL Server and SQL querying.

• Hands-on experience troubleshooting and optimizing:• Stored Procedures

• Functions

• Triggers

• Views

• Complex SQL queries

• Strong experience with SSRS (SQL Server Reporting Services).

• Experience troubleshooting/debugging applications using:• C#

• ASP.NET

• .NET Framework 4.0+

• .NET / .NET Core

• JavaScript

• jQuery

• Ability to analyze existing application code and perform or support debugging and bug fixes.

• Experience with source control tools such as Git/GitHub.

• Strong troubleshooting, analytical, and root cause analysis skills.

• Bachelor's degree in Computer Science, Information Technology, Software Engineering, or a related field.

• Advanced English (B2+/C1) – ability to communicate effectively with US-based technical and business teams.

• Availability to overlap with US working hours.

Nice to Have

• Experience with Power BI.

• Experience with Sigma Computing.

• Experience supporting applications hosted in Microsoft Azure.

• Knowledge of ITIL frameworks and application support best practices.

• Experience with application monitoring and performance optimization.