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 operational best practices.
• Prioritize multiple production incidents based on business impact while maintaining high-quality communication throughout the resolution process.

• 4+ years of experience in Application Support, Production Support, or Software Engineering.
• Strong experience with Node.js, TypeScript, REST APIs, and SQL.
• Experience troubleshooting distributed applications and performing Root Cause Analysis (RCA).
• Familiarity with Azure DevOps, Azure services, and CI/CD processes.
• Advanced English proficiency (B2+ or higher).

About Us

We Are Engineered Different.

At Applaudo, talented people design, build, and scale meaningful, AI-powered solutions that create real business impact. As an AI-native organization, we collaborate across design, development, cloud, data, and artificial intelligence to turn ideas into scalable products that transform how companies operate, make decisions, and grow.

We are building a high-performance culture grounded in five values: Empowering Excellence, Collaborative Teamwork, Unsolicited Respect, Consistent Transparency, and Efficient Communication. These define how we work, how we support one another, and how we hold ourselves accountable.

Applaudo is a place for people who want to learn fast, take ownership, and work alongside strong teams they are proud to belong to. Joining us means being part of an organization that is evolving intentionally, investing in modern ways of working, and leading AI-native transformation at scale.