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Following

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A1: Beginner
A2: Basic
B1: Intermediate
B2: Advanced Intermediate
C1: Advanced
C2: Proficient

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*

*

*

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*

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Basic
Intermediate
Advanced
Expert

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Backend Development
Frontend Development
Full-Stack Development
Mobile Development
API Development

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JavaScript / TypeScript
Python
Java
C#
React
Node.js
.NET
Other

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Yes, both web and mobile
Web applications only
Mobile applications only
No professional experience

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Yes, both
Unit testing only
Code reviews only
No experience

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Yes, in production
Yes, in personal or side projects
Familiar with the concepts, but no hands-on experience
No experience

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Basic
Intermediate
Advanced
Expert

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