Senior Functional & API QA Engineer

Optimum Solutions (Hong Kong) Limited; Hong Kong; On-site; HKD 420,000 - 560,000; Full time

Job summary

Optimum Solutions (Hong Kong) Limited is seeking a QA/Testing professional with 5–8 years of hands-on experience in functional and integration testing for business applications. You will use Postman for API testing, write SQL queries for test data, and work with defect and test management tools to ensure quality across releases.

You will collaborate with business analysts, developers, and project managers, and participate in daily stand-ups.

Qualifications

• Hands-on experience in functional and integration testing or QA for business applications.
• Strong ability to understand business processes and translate them into test scenarios and test cases.
• Practical experience using Postman (or similar tools) for API testing, including creating and executing API requests, validating responses and error handling, working with environments, collections, and basic scripting.
• Working knowledge of SQL: writing basic to intermediate SELECT queries, filtering, joining tables, and validating data for testing purposes.
• Familiarity with defect management and test management tools (Azure DevOps, Jira, HP ALM, or similar).
• Good analytical skills with attention to detail and a structured approach to testing.
• Ability to work collaboratively with business analysts, developers, and project managers.
• Strong written and verbal communication skills.
• Energetic, positive attitude, willing to learn, and open to taking on new responsibilities.
• Willingness to work overtime when required to support testing for critical releases or milestones.

Responsibilities

• Review and understand business requirements, user stories, and solution designs for assigned projects.
• Design, prepare, and execute functional test cases for system and regression testing.
• Design, prepare, and execute integration test cases, covering end-to-end flows across multiple systems.
• Use Postman or similar tools to test APIs (requests/responses, status codes, headers, payloads) and validate API integrations between systems.
• Query databases to prepare and validate test data and verify data integrity.
• Prepare and maintain test documentation (test cases, test execution reports) according to team standards.
• Log and track defects, collaborate with developers and analysts to clarify issues, and retest fixes.
• Contribute to regression testing for releases and changes to ensure key business flows remain stable.
• Participate in daily stand-ups and project meetings, providing clear status updates and raising risks or issues.

Skills

Functional & integration testing

Business process understanding

API testing

Communication skills

Willing to learn

Tools

Postman

SQL

Azure DevOps

Jira

HP ALM

Job description

Optimum Solutions (Hong Kong) Limited is seeking a QA/Testing professional with 5–8 years of hands-on experience in functional and integration testing for business applications. You will use Postman for API testing, write SQL queries for test data, and work with defect and test management tools to ensure quality across releases.

You will collaborate with business analysts, developers, and project managers, and participate in daily stand-ups.