Application Support Engineer, L3

Applaudo

Application Support Engineer investigating and resolving production incidents in distributed applications. Position based in El Salvador, Mexico, or Colombia with collaboration across teams.

Posted 7/9/2026full-timeRemote • 🇧🇷 BrazilMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

AzureJavaScriptMicroservicesNode.jsSQLTypeScript

About the role

Key responsibilities & impact

Investigate and resolve complex production incidents across distributed applications and microservices.
Analyze application logs, APIs, SQL data, and system integrations to identify root causes of production issues.
Perform structured Root Cause Analysis (RCA) and document findings, corrective actions, and preventive recommendations.
Debug backend services developed primarily in Node.js and TypeScript, implementing small code fixes when required.
Validate production fixes through API testing, SQL validation, and regression verification before deployment.
Collaborate closely with Development, QA, Infrastructure, and third-party vendors to coordinate incident resolution.
Differentiate issues originating from internally managed applications versus external platforms and coordinate the appropriate resolution path.
Monitor production environments and proactively identify potential risks before they impact business operations.
Communicate investigation progress, technical findings, and recommendations to both technical teams and business stakeholders.
Support deployment validation and investigate issues related to releases, configuration changes, or infrastructure updates.
Contribute to the continuous improvement of support processes, documentation, and operational best practices.
Prioritize multiple production incidents based on business impact while maintaining high-quality communication throughout the resolution process.

Requirements

What you’ll need

Bachelor’s Degree in Computer Science, Software Engineering, Computer Engineering, Information Technology, or a related field is desired, or equivalent professional experience.
4+ years of experience in Application Support, Production Support, Software Engineering, or similar technical roles.
Strong knowledge of Node.js and TypeScript, with the ability to read, debug, and implement small code fixes.
Solid experience working with REST APIs, HTTP protocols, and API debugging tools such as Postman.
Advanced SQL knowledge, including data validation, JOINs, stored procedures, execution analysis, and production troubleshooting.
Experience working with Git, GitFlow, pull requests, merge conflict resolution, and hotfix workflows.
Understanding of microservices architectures, asynchronous communication, and message-based integrations.
Experience performing Root Cause Analysis (RCA) and documenting technical findings.
Familiarity with Azure DevOps, repositories, deployment pipelines, and release management.
Experience working with Azure services such as App Services, Azure Monitor, and Azure Service Bus.
Understanding of CI/CD processes and deployment validation.
Knowledge of authentication, authorization, and basic secrets management concepts.
Experience using browser developer tools to troubleshoot frontend issues is a plus.
Strong analytical, troubleshooting, communication, and problem-solving skills.
Advanced English proficiency (B2+ or higher).

Benefits

Comp & perks

Employees can work remotely

ATS Keywords

✓ Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

Application SupportProduction SupportSoftware EngineeringREST APIsMicroservices ArchitectureCI/CD ProcessesDebuggingData ValidationTroubleshootingConfiguration Management

Soft Skills

Analytical SkillsProblem-SolvingCommunication SkillsCollaborationTime Management