for sure: get a peer or subordinate that's somehow experienced. It's good for 2 points: to have someone to exchange knowledge and to have them as a backup, at l

for sure: get a peer or subordinate that's somehow experienced. It's good for 2 points: to have someone to exchange knowledge and to have them as a backup, at least for support operation. Then for your skill, understand that usually data is the most important thing in a system, especially for internal company. Learn about database design and normalization, as a data engineer I'm sure you know how critical it is. As for application level, ensure that ACID is achieved on critical-level operation, and learn maintainability. Additionally backup / disaster recovery and/or replication also can be learned if you interested on devops route more. Having a backup (and can restore it) is a must, either you or hire someone else to do it, or hosting at a cloud.