Application Support Engineer (Java / PL-SQL / AWS)

Unison Group

Singapore, Singapore, Singapore contract

Posted: March 11, 2026

Job Description

Job Overview

We are looking for a highly skilled Application Support Engineer with advanced expertise in Java, PL/SQL, and AWS to support mission-critical enterprise applications. The role involves production support, troubleshooting complex issues, system monitoring, and ensuring application stability and performance in a cloud-based environment.

Key Responsibilities

• Provide L2/L3 production support for enterprise applications built using Java-based technologies.
• Diagnose and resolve complex application, database, and integration issues in a timely manner.
• Write and optimize advanced PL/SQL queries, stored procedures, and performance tuning.
• Monitor applications hosted on AWS cloud infrastructure and ensure high availability.
• Perform incident management, root cause analysis (RCA), and problem management.
• Work closely with development, DevOps, and infrastructure teams to resolve production issues.
• Support application deployments, release management, and environment configuration.
• Monitor system health using logging, monitoring, and alerting tools.
• Ensure compliance with SLA, incident response time, and service delivery standards.
• Maintain documentation for support procedures, known issues, and resolutions.

Required Skills

• Strong hands-on experience in Java/J2EE technologies.
• Advanced PL/SQL expertise including query optimization and database performance tuning.
• Solid experience with AWS services (EC2, S3, RDS, CloudWatch, Lambda, etc.).
• Experience in production support and incident management processes.
• Strong knowledge of SQL databases (Oracle, PostgreSQL, or similar).
• Experience with Linux/Unix environments and shell scripting.
• Familiarity with CI/CD pipelines, version control (Git), and DevOps practices.
• Excellent problem-solving and troubleshooting skills.

Preferred Skills

• Experience supporting microservices architecture and REST APIs.
• Knowledge of monitoring tools such as Splunk, Dynatrace, or ELK.
• Experience in banking, financial services, or enterprise systems is a plus.
• Understanding of containerization technologies (Docker, Kubernetes).

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