Yujun Liang is an experienced application developer who has been using Java for more than 10 years and has developed many mission critical applications. He is now working as a DevOps Engineer on the Cloud Migration team for Fidelity Investments.
Even though he had touched AWS a couple of times in the past, the areas of the services were limited to certain areas and he never got a chance to work on those services on various day jobs. So he decided to pursue the certifications. Partly as a job requirement from his management.
He passed all 5 certifications in 4 months.