Senior Java Backend Engineer (Oracle & PL/SQL

Java Oracle PL/SQL

Senior Java Backend DeveloperOracle PL/SQL),

Oracle Oracle PL/SQL Stored ProcedurePackageFunctionTrigger SQL Production Environment

MySQLPostgreSQL SQL Server Oracle PL/SQL

• 5 Java
• 3 Oracle
• Production Environment

Java

• Java SE / Java EE
• OOP
• MVC
• Spring FrameworkSpring Boot / Spring MVC
• MyBatis / iBatis
• RESTful API
• Multi-threading

Oracle

• Oracle Database
• PL/SQL
• Stored Procedure
• Package
• Function
• Trigger
• SQL Performance TuningSQL
• Query OptimizationSQL

• Git SVN

• OceanBase
• MongoDB
• ClickHouse
• AI CursorClaude CodeGitHub Copilot
• System Integration

• Java
• Oracle PL/SQLStored ProcedurePackageFunction Trigger
• SQL
• RESTful API
• MongoDBClickHouse

Senior Java Backend Developer (Oracle PL/SQL)

Position Overview

We are looking for an experienced

Senior Java Backend Developer (Oracle PL/SQL) to design, develop, and maintain enterprise backend applications, database business logic, and high-performance systems.

This role is primarily focused on Oracle database development. The successful candidate must have strong hands-on experience in Oracle PL/SQL development, including Stored Procedures, Packages, Functions, Triggers, and SQL performance tuning. You will also be involved in building scalable backend services, optimizing enterprise applications, and supporting large-scale production systems.

Candidates whose primary experience is limited to MySQL, PostgreSQL, or SQL Server without Oracle PL/SQL development experience are unlikely to be suitable for this role.

Must-Have Requirements

Applicants must meet all of the following requirements.

Experience

• Minimum 5 years of Java Backend Development experience.
• Minimum 3 years of Oracle Database Development experience.
• Experience developing, maintaining, and supporting enterprise applications in a Production Environment.
• Experience working on large-scale enterprise systems.

Java Backend Development

• Strong proficiency in Java SE / Java EE.
• Solid understanding of Object-Oriented Programming (OOP).
• Good knowledge of MVC architecture.
• Hands-on experience with Spring Framework (Spring Boot / Spring MVC).
• Experience with MyBatis / iBatis.
• Experience developing RESTful APIs.
• Experience with multi-threaded application development.

Oracle Database (Core Requirement)

Hands-on experience with:

• Oracle Database
• PL/SQL
• Stored Procedures
• Packages
• Functions
• Triggers
• SQL Performance Tuning
• SQL Query Optimization

Other Technical Skills

• Experience with Git or SVN version control.
• Strong troubleshooting, debugging, and performance optimization skills.

Preferred Qualifications

Candidates with the following experience will have an advantage:

• OceanBase database
• MongoDB
• ClickHouse
• Big Data platforms
• AI-assisted development tools (e.g. Cursor, Claude Code, GitHub Copilot)
• System integration experience
• Project management experience
• Team leadership experience

Key Responsibilities

• Design, develop, test, deploy, and maintain enterprise Java backend applications.
• Develop Oracle database business logic using PL/SQL, including Stored Procedures, Packages, Functions, and Triggers.
• Analyse, troubleshoot, and resolve application, database, and performance issues.
• Optimise SQL queries and database performance to improve system efficiency.
• Develop and maintain RESTful APIs and support system integration.
• Support large-scale data processing using technologies such as MongoDB and ClickHouse where applicable.
• Maintain and optimise production systems to ensure performance, stability, and scalability.
• Collaborate with cross-functional teams to deliver high-quality software solutions.
• Perform other related technical duties as assigned.

Qualifications

• Bachelor's Degree in Computer Science, Information Technology, Software Engineering, or a related discipline.
• Strong analytical and problem-solving skills.
• Detail-oriented with a strong sense of ownership and accountability.
• Able to work independently and collaborate effectively in a team environment.

Language Requirements

• Good written and spoken English.
• Mandarin is preferred to support communication with Mandarin-speaking clients, users, and business partners.