Junior, Medior, Senior, Expert experience in years - difference

What is the difference between Junior, Medior, Senior and Expert job position ? How many years of experience are required for Junior, Medior, Senior and Expert position ?

The difference between Junior, Medior, Senior and Expert job position is in experience. The level of experience can be evaluated in years, but this method is quick and not so accurate. For example, there are two accountants with 3 years of experience. The first one is focusing only on 1-2 accounts, but the second one is focusing on 4-5 accounts. Because of that, they don't have the same experience.

Experience evaluation in years:

• Junior position - no experience, or less than 2 years of experience
• Medior position - between 2 years and 5 years of experience
• Senior position - more than 5 years of experience

The level of experience depend also on industry and job position, so it may vary.

In software development, the evaluation of work experience for Junior, Medior and Senior job positions can be:

• Junior - no experience, or less than 1 year of experience
• Medior - between 1 year and 3 years of experience
• Senior - more than 4 years of experience