Sr. Application Support Engineer

Roles and Responsibilities

• Work on production support activities, including incident handling, minor enhancements, and application maintenance
• Identify and analyze root causes of technical issues, system incidents, and job failures
• Be available, on a need basis, for off‑hours support, including P1 on‑call support situations
• Perform effort estimation for assigned tasks and approved change orders
• Implement and follow best practices for production support programming and application maintenance
• Work independently, while also tracking and coordinating with the team to ensure delivery within timelines agreed with the customer
• Communicate effectively with clients and end users at all organizational levels
• Prepare and provide regular status reports to both internal and external stakeholders
• Engage with and escalate to appropriate teams and stakeholders as required to resolve issues in a timely manner
• Support and participate in transition execution activities, including knowledge transfer and stabilization phases
• Perform any other duties assigned by the Supervisor, related to the scope of work
• Place of implementation: Hybrid work model or client location, depending on project requirements.

Key Work Expectations:

• Demonstrate a strong willingness to learn and continuously upskill, in line with evolving customer technology demands
• Maintain high standards of professionalism, responsibility, and quality in all assigned activities
• Are capable of supporting long‑term operations, maintenance, and customer‑facing engagements

Key Skills Summary:

• L2 Application Support & Maintenance experience supporting business critical production systems, including incident analysis, defect fixes, minor enhancements, and service stabilization
• Proven capability in Root Cause Analysis (RCA) for application issues, batch/job failures, and recurring production incidents, with a focus on permanent resolution
• Hands on experience supporting frontend applications built with React.js, Next.js, TypeScript, and JavaScript in live production environments
• Strong exposure to backend, database, and infrastructure support, including Java (Spring Boot), Node.js, AWS (EC2, S3, RDS), Linux, and SQL based systems
• Experience working in SLA driven, client facing environments, including on call / P1 support, issue escalation, coordination with L3 teams, and regular status reporting
• Bilingual operational professional with business level Japanese (JLPT N2) and English, effective in stakeholder communication, documentation, and support reporting  

Must have:

• JavaScript, TypeScript, API, CSS, React, HTML, Next.js,  Solidity,  Java

Preferred:
certifications/language skills:

• IT expertise in information systems
• JLPT N1 (Business Level Japanese Proficiency)                                                                                                          English proficiency at a business level or above. (TOEIC score 750 or above)