Senior Application Supporter Java, API, SQL, ITIL

JOB OBJECTIVES

A Senior Application Support Specialist to ensure the stability, availability, and optimal performance of our critical business applications. In this role, you will lead complex incident troubleshooting, conduct root-cause analysis (RCA), and collaborate closely with cross-functional technical teams and external vendors to drive continuous system enhancements

KEY RESPONSIBILITIES

• Provide daily application support including monitoring, troubleshooting, and resolving incidents for assigned applications.
• Analyze system issues by understanding application logic, data flow, and business rules; work closely with development teams to validate findings.
• Coordinate with internal teams (infrastructure, development, security) and vendors to ensure timely resolution and effective communication.
• Support problem management by conducting root‐cause analysis (RCA) for recurring or high‐severity issues.
• Maintain high‐quality technical documentation, including system flow diagrams, troubleshooting steps, application inventories, deployment procedures, and SOPs.
• Participate in application enhancement and new system development activities, including requirements clarification, understanding design documents, and supporting UAT/testing.
• Perform backend checks (e.g., SQL queries, system logs, configuration validation) to support issue investigation.
• Prepare regular reports including incident summaries, trend analysis, and improvement recommendations.
• Participate in after‐hours/on‐call support when required for major incidents.

• Proficiency in English (written and spoken) to communicate with regional teams and vendors.
• Minimum 5 years of experience in Application Support, IT Operations, or a similar technical role.
• Solid understanding of application architecture:
  • System design concepts
  • Backend-frontend interaction
  • API and integration flow
  • Database structure and queries
• Ability to read and interpret basic code logic (e.g., Java, .NET, Python, SQL) to understand root causes-actual coding not required.
• Familiarity with SDLC (Software Development Life Cycle) and Agile/Waterfall development methodologies.
• Strong analytical and troubleshooting skills, able to break down complex issues into understandable components.
• Experience with ITIL processes (Incident, Problem, Change).
• Good documentation skills: flowcharts, SOPs, troubleshooting guides, user manuals.
• Basic experience using SQL and working with application logs.
• Ability to work under pressure and manage communication during critical issues.

• Annual salary review (once per year).
• Dynamic, technology-driven working environment with opportunities for self-development and career advancement.
• insurance, annual leave, and 13th-month salary in accordance with state regulations.
• Participation in Social, Health, and Unemployment Insurance (BHYT, BHXH, BHTN).
• Annual health check-up.
• Participation in sports activities, workshops, birthday celebrations, team building, and company trips on a quarterly and yearly basis.