Job Description - Responsible for testing stability samples, release samples, and validation samples for clinical products, including protein concentration, DAR, peptide mapping, CEX, moisture content, and other physicochemical assays. - Responsible for method qualification, method transfer, and method validation for protein concentration, DAR, peptide mapping, CEX, moisture content, and other physicochemical methods. - Responsible for qualification of laboratory equipment. - Responsible for coordinating and following up on the maintenance and calibration of relevant equipment in the AST Physicochemical Laboratory. - Responsible for sample management activities in the AST Physicochemical Laboratory. - Provide technical support for deviations and investigations from the Operations QC team, including OOX investigations and product impact assessments for events potentially related to product quality. - Comply with company EHS policies and procedures, fulfill EHS-related responsibilities, and promptly report EHS incidents, hazards, and risks. Qualifications & Competencies - Bachelor's degree or above in Pharmaceutical Sciences, Medicinal Chemistry, Pharmacy, Biology, Chemistry, or a related discipline. - Good command of English and computer skills; CET-4 (College English Test Band 4) or above. - Positive, responsible, and willing to learn and take initiative. - Good teamwork, organizational, analytical, and problem-solving skills. - Good communication and interpersonal skills.