Application Support Engineer (L3)
About You
You are an Application Support Engineer with a passion for solving complex production issues and ensuring the stability of business-critical applications. You thrive in fast-paced environments where analytical thinking, ownership, and effective troubleshooting are essential to maintaining high service availability.
You enjoy investigating production incidents, identifying root causes, and collaborating with cross-functional teams to deliver timely and sustainable solutions. You are comfortable working across distributed systems, understanding existing codebases, and communicating technical findings clearly to both technical and non-technical stakeholders.
You bring a proactive mindset, strong problem-solving skills, and a continuous improvement mentality to enhance application reliability and operational excellence.
Note: This opportunity is currently open only to candidates residing in El Salvador, Mexico, or Colombia .
You Bring to Applaudo the Following Competencies:
- 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.
- Experience investigating and troubleshooting production incidents across distributed or microservices-based applications.
- 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).
You Will Be Accountable for the Following Responsibilities:
- 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 o