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I am Mingjun Chang, a QA professional with 20 years of experience in automated testing and exploratory approaches, including four years at Microsoft and ten years in financial services. I have hands-on experience with C#, Python, SQL Server, Oracle, Java, and testing frameworks such as Selenium, NUnit, and Postman. I specialize in context-driven testing, bug triage, and delivering reliable, high-quality releases in fast-paced environments. I’m a collaborative team player who thrives in Agile squads, contributing to analysis, design, and continuous improvement. I’m ISTQB certified and proactive about knowledge sharing and quality ownership across teams.…I am Mingjun Chang, a QA professional with 20 years of experience in automated testing and exploratory approaches, including four years at Microsoft and ten years in financial services. I have hands-on experience with C#, Python, SQL Server, Oracle, Java, and testing frameworks such as Selenium, NUnit, and Postman. I specialize in context-driven testing, bug triage, and delivering reliable, high-quality releases in fast-paced environments. I’m a collaborative team player who thrives in Agile squads, contributing to analysis, design, and continuous improvement. I’m ISTQB certified and proactive about knowledge sharing and quality ownership across teams.

Mingjun Chang

QA Engineer, Developer, Web Developer, +2

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I am Mingjun Chang, a QA professional with 20 years of experience in automated testing and exploratory approaches, including four years at Microsoft and ten years in financial services. I have hands-on experience with C#, Python, SQL Server, Oracle, Java, and testing frameworks such as Selenium, NUnit, and Postman. I specialize in context-driven testing, bug triage, and delivering reliable, high-quality releases in fast-paced environments. I’m a collaborative team player who thrives in Agile squads, contributing to analysis, design, and continuous improvement. I’m ISTQB certified and proactive about knowledge sharing and quality ownership across teams.…I am Mingjun Chang, a QA professional with 20 years of experience in automated testing and exploratory approaches, including four years at Microsoft and ten years in financial services. I have hands-on experience with C#, Python, SQL Server, Oracle, Java, and testing frameworks such as Selenium, NUnit, and Postman. I specialize in context-driven testing, bug triage, and delivering reliable, high-quality releases in fast-paced environments. I’m a collaborative team player who thrives in Agile squads, contributing to analysis, design, and continuous improvement. I’m ISTQB certified and proactive about knowledge sharing and quality ownership across teams.

Available to hire

I am Mingjun Chang, a QA professional with 20 years of experience in automated testing and exploratory approaches, including four years at Microsoft and ten years in financial services. I have hands-on experience with C#, Python, SQL Server, Oracle, Java, and testing frameworks such as Selenium, NUnit, and Postman. I specialize in context-driven testing, bug triage, and delivering reliable, high-quality releases in fast-paced environments.

I’m a collaborative team player who thrives in Agile squads, contributing to analysis, design, and continuous improvement. I’m ISTQB certified and proactive about knowledge sharing and quality ownership across teams.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Advanced

Work Experience

Quality Assurance Analyst at FIS

August 1, 2025 - August 1, 2025

Performed end-to-end exploratory and automated testing of an asset finance product across accounting, pricing, and REST APIs. Contributed to Vertex tax integration testing and REST API validation, ensuring accuracy and regulatory compliance. Employed NUnit, proxy tests, Selenium, and API tests; validated backend data in SQL Server and Oracle; collaborated in Scrum/Kanban.

Software Tester at China Minsheng Banking Corp.ltd

February 1, 2024 - February 1, 2024

Tested 15+ agile projects using Java, Oracle, MySQL. Analyzed requirement documents and developed test plans with context-driven testing approaches. Identified technical, architectural and process risks and issues. Automated UI test cases by Python and Selenium and Automated API test cases. Developed a Python-based test case generation tool from Excel inputs. Improved testing environment management and reduced post-release bugs by 50%. Developed over 200 automatic deployment pipelines via CI/CD tools.

Software Tester at PCITC

August 1, 2010 - August 1, 2010

Developed test plans and led team members to complete test tasks according to plan. Controlled quality of test cases to improve efficiency and performed performance appraisals to support team progress.

Software Tester at Digital China

March 1, 2010 - March 1, 2010

Managed a 10-person Microsoft Dynamics test automation team; maintained good communications between US and Beijing teams; created test plans, assigned tasks, and tracked progress. Developed test frameworks and tools to improve efficiency; produced high-quality test cases and reported bugs; led the team to top performance and earned Microsoft recognition.

Software Tester at Powerise

April 1, 2006 - April 1, 2006

Wrote Test Design Specification Documents according to Functional Specifications; created test tools and batches, wrote automation frameworks, and automated test cases. Investigated daily test results, reported, investigated, and tracked bugs.

Software Developer at Create IT

January 1, 2005 - January 1, 2005

Communicated with customers, determined UI and Data Entities; defined interfaces between layers. Developed more than 40 features with Stored Procedures and Unit Test Cases.