Senior Java & SQL Developer - Kuwait

Diyar United Company; Kuwait City; On-site; KWD 201,000 - 335,000; Full time

Job summary

Diyar United Company is seeking an experienced Java backend developer to design and build scalable, high-performance applications in Kuwait City. You will analyze system behavior under load, optimize SQL queries, and resolve bottlenecks across application and database layers.

The role requires strong Java frameworks knowledge, REST API experience, and the ability to troubleshoot production issues. Collaboration with infrastructure teams will include JVM tuning, connection pools, and server

Qualifications

• Bachelor's degree in CS/IT or related field.
• 5+ years experience in Java backend development.
• Strong SQL performance tuning and optimization experience.
• Proven ability to handle high-concurrency or high-traffic systems.
• Solid knowledge of Java frameworks and REST APIs.

Responsibilities

• Design and develop scalable, high-performance Java applications.
• Analyze system behavior under load and optimize.
• Perform advanced SQL tuning (execution plans, indexing, query refactoring).
• Identify and resolve performance bottlenecks in application and database layers.
• Lead troubleshooting of production issues (slow responses, timeouts, DB locks).
• Optimize database structures, queries, and transactions for efficiency.
• Support and enhance student systems and registration platforms.
• Collaborate with infrastructure teams to tune JVM, pools, and servers.
• Implement caching, load balancing, and performance improvements.
• Review and improve existing codebase for efficiency and scalability.
• Maintain clear documentation for systems, fixes, and optimizations.

Skills

Java backend development

SQL performance tuning

High concurrency systems

REST APIs

Production troubleshooting

Education

Bachelor's degree in Computer Science, IT, or related field

Tools

WildFly / Tomcat

JVM tuning

Connection pooling

Linux servers

Monitoring tools

Job description

• Design and develop scalable, high-performance Java applications.


• Analyze system behaviour under load and perform optimizations.


• Perform advanced SQL tuning (execution plans, indexing strategies, query refactoring).


• Identify and resolve performance bottlenecks in application and database layers.


• Lead troubleshooting of production issues (slow response, timeouts, DB locks).


• Optimize database structure, queries, and transactions for maximum efficiency.


• Support and enhance student systems and registration platforms.


• Work closely with infrastructure teams to tune JVM, connection pools, and servers.


• Implement caching, load balancing, and performance improvement techniques.


• Review and improve existing codebase for efficiency and scalability.


• Maintain clear documentation for systems, fixes, and optimizations.

Required Qualifications

• Bachelor’s degree in Computer Science, IT, or related field.


• 5+ years experience in Java backend development.


• Strong hands-on experience with SQL performance tuning and optimization.


• Proven experience handling high-concurrency or high-traffic systems.


• Strong knowledge of Java frameworks.


• Experience with REST APIs and system integrations.


• Strong analytical and troubleshooting skills in production environments.

Preferred Qualifications

• Experience with application servers (e.g., WildFly / Tomcat).


• Experience with JVM tuning (heap, GC, thread pools).


• Experience with connection pooling and data-source tuning.


• Familiarity with Linux server environments.


• Experience with monitoring and logging tools.


• Experience with student systems / registration platforms.