Salesforce
Also written as Apex, SFDC
A dominant enterprise CRM platform with its own development ecosystem (Apex, Visualforce, Lightning) — 'Salesforce Developer' and 'Salesforce Admin' are distinct, specialized career tracks largely separate from general software engineering.
Think of it like
Like a chain restaurant's proprietary point-of-sale system — a real, deep skill set of its own, but one that mostly only transfers to other locations running the same system.
Junior or senior?
Junior sounds like
Describes their Salesforce work vaguely as 'using Salesforce.'
Senior sounds like
Can say clearly whether it was custom development — Apex, Lightning components — or configuration and administration.
Ask them
“Was your Salesforce work custom development (Apex, Lightning components), or configuration and administration within the platform's existing tools?”