As I always used to say, twitter has been a platform for anything for people. And lately the most popular thing, Job search, is also available on twitter, through a 3rd party service called TwitHire which allows you to post job tweets, and accept them. All through Twitter and the job service.

TwitHire is a free job listing board on twitter. Just tweeting can setup your career and TwitHire can help you with that.
Through this site, you can -

• Post tweets with opportunities and job listings for people.
• Read the tweets and job listings from people, and accept them if you are a candidate trying to search for jobs.
• Jobs availability for Designing, programming and any other topic for employment.
• Post with the Job position, company name and your twitter name, so that the people aspiring for jobs can reply with their interest.

Steps to Post a Job Tweet -
Step 1. Generate Job Tweet and Key.
Step 2. Post Job Tweet + Key to Twitter.

You can post the Job tweets and search for Job listings through TwitHire.com!