Depends if its senior with a specific technology (ex: senior rails programmer) or generally senior programmer.

I consider senior someone who: - knows how to mentor juniors - knows his way around tech, even if he never used a particular product - most important, can communicate effectively with stakeholders and devs.

The best "senior" is the one who nags everyone to get stuff moving forward. Doesnt mind getting his hands dirty and going by people's desks to make sure the team delivers.

You may need to brush up your marketing skills in order to promote yourself as senior. Don't get impressed by people that know stuff.