Develop a mobile application mockup designed for crew members, mirroring the layout and functionality of the provided screenshot. The mockup should feature a profile section that includes fields for 'Full Name', 'Gender', 'Birthdate', 'Age', 'Civil Status', and 'Address'. Replace the label 'E-201' with 'Certificates/Licenses' within the relevant section. Additionally, integrate a QR code that, when scanned, directs to the crew member's profile information. The application should be tailored for use by crew members, replacing the term 'Employee' with 'Crew' throughout the application.