Date: 01/12/2017

To whomsoever it may concern

This is to certify that Liu Yang was working with Tech Ltd. at Chaoyang District, Beijing, China as a Full-Time employee since Sep 6, 2010 to Nov 10, 2017 as an ICT Quality Assurance Engineer.

His Roles and responsibilities are as follows:

• Reviewing requirements, specifications and technical design documents to provide timely and meaningful feedback
• Creating detailed, comprehensive and well-structured test plans and test cases
• Estimating, prioritizing, planning and coordinating testing activities
• Designing, developing and executing automation scripts using open source tools
• Identifying, recording, documenting thoroughly and tracking bugs
• Performing thorough regression testing when bugs are resolved
• Developing and applying testing processes for new and existing products to meet client needs
• Liaising with internal teams (e.g. developers and product managers) to identify system requirements
• Monitoring debugging process results
• Investigating the causes of non-conforming software and train users to implement solutions
• Tracking quality assurance metrics, like defect densities and open defect counts
• Staying up-to-date with new testing tools and test strategies
• Reviewing product design documentation to ensure that requirements stated are correct, unambiguous, and verifiable.
• Consulting with product development to evaluate system interfaces, operational requirements, and performance requirements of overall system.
• Defining test methods and creating test plans for new or updated software projects to determine if the software will perform accurately and reliably according to documented requirements as well as established standards under both normal and abnormal conditions.
• Recommending design improvements or corrections to engineers throughout the development process.
• Maintaining effective communication with the project software engineers on project limitation, capability, performance requirement and hardware interface changes.
• Executing test plans and creating test reports to describe program evaluation, testing, and correction.
• Monitoring program performance after implementation to prevent reoccurrence of program operating problems and ensure efficiency of operation.
• Conducting compatibility tests with vendor-provided programs.
• Formulating and designing software systems, using scientific analysis and mathematical models to predict and measure outcome and consequences of design.
• Creating test tools that facilitate data gathering and test method execution.
• Supporting manufacturing by verifying fixture software or any software used during production.
• Supporting clinical studies by validating data collection processes.
• Participating in risk management meetings.

Sincerely yours,

Mr Joshua,
Manager