Senior .NET Developer

CXC Global Hong Kong Limited; Kuala Lumpur; On-site; MYR 70,000 - 90,000; Full time

Job summary

A leading technology company is seeking a skilled .NET Developer in Kuala Lumpur to develop and optimize mobile and web applications. This role requires a minimum of 5 years of .NET development experience, including proficiency in C#, .NET Core, and SQL. The ideal candidate will have strong debugging skills and a solid understanding of application security practices. Fluency in Bahasa Malaysia and English is essential. The position offers opportunities for collaboration on various projects and performance optimization.

Qualifications

• Minimum 5 years of experience in .NET development.
• Strong proficiency in C#, .NET Core, and API development.
• Experienced in debugging and resolving technical issues.
• Solid understanding of JWT Authentication and application security.
• Skilled in application performance tuning.
• Experience with SQL, query tuning, and complex queries.
• Experience with .NET MAUI is essential.
• Fluent in Bahasa Malaysia and English.

Responsibilities

• Develop, enhance, and maintain mobile and web applications.
• Troubleshoot and resolve complex application issues.
• Work with AWS and implement application-level security.
• Perform Unit Testing and support SIT/UAT.
• Propose and implement solutions based on system behavior.
• Ensure compatibility across Android, iOS, and Huawei.
• Collaborate on deployment readiness and technical assessments.
• Build and manage complex SQL queries and debugging.

Skills

C#

.NET Core

API development

SQL

JWT Authentication

Application performance tuning

.NET MAUI

English

Bahasa Malaysia

Tools

AWS services

Job description

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We are looking for a skilled .NET Developer to support, enhance, and optimize key mobile and web applications. This role involves hands‑on development, debugging, performance tuning, and ensuring smooth cross‑platform functionality across Android, iOS, and Huawei devices.

What You’ll Do:

• Develop, enhance, and maintain features across mobile and web applications, including .NET MAUI and CMS‑driven platforms.
• Troubleshoot and resolve complex application issues, including performance tuning, SQL optimization, and root‑cause debugging.
• Work with AWS, JWT Authentication, and implement required application‑level security remediation.
• Perform Unit Testing, support SIT/UAT, and resolve defects discovered during testing phases.
• Propose, develop, and implement solutions or workarounds based on system behavior, logs, and debugging findings.
• Ensure clean functionality and compatibility across Android, iOS, and Huawei (HMS) environments.
• Collaborate with technical leads and cross‑functional teams on deployment readiness and technical impact assessments.
• Build and manage complex SQL queries, test cases, and cross‑platform debugging to ensure reliable application performance.

Qualifications:

• Minimum 5 years of experience in .NET development
• Strong proficiency in C#, .NET Core, API development
• Experienced in debugging and resolving complex technical issues
• Solid understanding of JWT Authentication and application security practices
• Skilled in application performance tuning and optimization
• Experience with SQL, query tuning, and writing complex queries
• Experience with .NET MAUI is required
• Fluent in Bahasa Malaysia and English
• Preference for Malaysian local candidates

Nice to Have:

• Experience working with AWS services
• Exposure to mobile application development or cross‑platform technologies