Wanted Ruby on Rails Developer for a Q&A site - fixed fee basis

Designing a Q&A site for a course project (80% completed, need help on rest 20%). Fixed fee project.

Candidate must be exceedingly proficient in using following:

1. Linux (ubuntu latest server edition)
2. Ruby 1.9.2
3. MongoDb 1.8
4. Redis 2.2.2
5. NodeJS 0.4.5
6. Sphinx 1.10
7. Git