Answer:
Walter can choose to follow some online professional courses such as the one offered by Udemy, TreeHouse, Linkedln Learning and earn the certification upon completion of the courses. Those courses can be based on the learners' own pace at any place they wish.
Besides, some tech corporation like Microsoft offer similar web development qualification as well such as Microsoft Certified Solutions Developer. This certification is aimed to validate a person who have the skills needed to build modern mobile or web applications and services.
