As a developer/senior developer, it is expected that you are strong in terms of Programming Fundamentals as well as have strong hands-on experience working on the technologies/platforms/languages that are you specializing on.
You should be allocating at least 2 hours everyday for practicing hands-on programming (be it on your project or as a separate learning if you are on bench). Practice is the key to becoming a great programmer. There is no other secret other than practice. Experience is only considered valuable if you have a culture of coding practice and as years pass by, you should know more problem solving techniques (not just naive but efficient ones).
Proficient in one or more of the following programming languages. Best thing to aim at is to be strong in at least 1 server side language and 1 client side language.
Usually, developers like to be pure coding geeks or be a platform/product specialist. If your desire is to be an expert in a product/platform, then you should have knowledge working on any of the following leading products/platforms like: