Fix Social App Algorithm Bugs

Our social application is currently experiencing an issue with its search algorithm wherein it's providing incorrect results. This search algorithm is intended to find specific user profiles using a mix of criteria: usernames, location, and user interests. We require a proficient Codeigniter developer who can critically evaluate the current code, identify the bugs creating these issues, and implement an effective solution. Additional skills in database management and optimization will be crucial for enhancing the accuracy and efficiency of the search algorithm.

Ideal Candidate:
- Proficient in CodeIgniter
- Excellent in database management
- Experience in algorithm development and debugging
- Knowledge of developing and implementing search features in social apps
- Understanding of common user search behaviors and preferences.