Salaries are very very different. According to Glassdoor, a Silicon-Valley-based senior can charge make up to $120,000/yr. But a junior from Mexico makes almost 10 times less - $13,500/yr. The skills are also important:
DevOps Engineer $130,000
Embedded Software Developer $82,000
CRM developer $77,000
Mobile application development $73,000
ERP solution development $69,000
(The salaries are for the USA).
Source: s://bridgeteams.com/blog/average-software-developer-salary/