Cellcard (CamGSM PLC.)

Engineer, API Development

Consulting/Professional Services, Electronics/Electrical Equipment, Engineering/Machi...Posted 7/8/2026

Location

Boeng Keng Kang | Phnom Penh

Job Type

FULLTIME

Level

Mid

Work Mode

On-site

Industry

Consulting/Professional Services, Electronics/Electrical Equipment, Engineering/Machi...

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About the role

Design, develop, and maintain RESTful and/or event-driven APIs that are scalable, secure, and high-performing.
Define and enforce API standards, including naming conventions, versioning, error handling, and documentation.
Ensure APIs meet security best practices, including authentication, authorization, data protection, and rate limiting.
Implement and maintain API documentation (e.g., OpenAPI/Swagger) to support internal and external consumers.
Monitor API performance, availability, and reliability; proactively identify and resolve bottlenecks or failures.
Integrate APIs with databases, message queues, and third-party services while ensuring data consistency and reliability.
Troubleshoot and resolve production issues, providing root-cause analysis and preventive solutions.
Collaborate with backend, frontend, mobile, and integration teams to ensure seamless system interoperability.

Requirements

Understanding of API design principles, including RESTful APIs, HTTP methods, status codes, and best practices.
Knowledge of API security standards such as OAuth 2.0, JWT, API keys, and role-based access control.
Familiarity with API documentation and specification standards (OpenAPI/Swagger).
Understanding microservice architecture and service-to-service communication patterns.
Proficiency in one or more backend programming languages commonly used for APIs (Java, Spring Boot, Node.js, .NET).
Experience integrating APIs with databases, message brokers, and third-party services.
Skilled in debugging, performance tuning, and troubleshooting API-related issues.
Experience with CI/CD pipelines, automated testing, and API testing tools such as Jenkin, ArgoCD.
Experience with Microservice with Kubernetes.
Proficiency in containerize and Docker.

Required Skills

API design principlesRESTful APIsHTTP methodsHTTP status codesAPI security standardsOAuth 2.0JWTAPI keysRole-based access controlAPI documentationOpenAPI/SwaggerMicroservice architectureService-to-service communication patternsJavaSpring BootNode.js.NETAPI integrationDatabase integrationMessage broker integration

Benefits

Rewards for over performance
Join an experienced team
Learn new Skills on the jobs

About Cellcard (CamGSM PLC.)

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Launched in 1997, Cellcard is Cambodia’s longest-serving and only 100% Cambodian-owned operator, reputed for its long history of first-to-market innovations, outstanding customer service and fast, reliable mobile network. Considered as one of the leading telco companies in Cambodia, Cellcard services over four million customers with nationwide coverage and an expansive dealer and distribution network.

Employees

1001 to 5000

Industry

Telecommunications

City

Phnom Penh