Authorize.net (SIM) integration with Jamit Job Board

Hi, We need a coder who is familiar with Jamit Job Board software to help us active the [login to view URL] (SIM) payment module, and also do a little bit of custom programming after the user has paid, and gets an "OK" status from Authorize.net. We will provide you with the [login to view URL] Key. The account has been setup, and is currently in TEST mode. Our Job Boards have MEMBERSHIPS for both Job Seekers and Employers. The Job Seeker only has 1 type of membership that he pays $89.95 for 6 months. The Employer has several different MEMBERHIPs - Unlimited Yearly Job Postings 2295 USD One (single) 30 Day Job Posting 349 USD Unlimited 30 Day Job Postings 399 USD Unlimited 6 Month Job Postings 1399 USD Unlimited 60 Day Job Postings 699 USD One (single) 90 Day Job Posting 599 USD One (single) 60 Day Job Posting 499 USD Unlimited 90 Day Job Postings 799 USD When the user joins, and enters in the payment info, he will be transferred to [login to view URL] where he enters his payment info. The payment is processed, and it returns back to our website. We can make it go to a custom landing "Thank You" page. After the payment is processed, and on the "Thank YOu" page, please add the following custom code (this will involve updating the EMLOYER records)for Employer's memberships: MEMBERSHIP ID=4 Unlimited Yearly Job Postings 2295 USD - Can View Resumes = YES, Can post for free = YES MEMBERSHIP ID=5 One (single) 30 Day Job Posting 349 USD - Can View Resumes = YES, Can post for free = NO, Posting Credits = 1 MEMBERSHIP ID=6 Unlimited 30 Day Job Postings 399 USD - Can View Resumes = YES, Can post for free = YES MEMBERSHIP ID=7 Unlimited 6 Month Job Postings 1399 USD - Can View Resumes = YES, Can post for free = YES MEMBERSHIP ID=8 Unlimited 60 Day Job Postings 699 USD - Can View Resumes = YES, Can post for free = YES MEMBERSHIP ID=9 One (single) 90 Day Job Posting 599 USD - Can View Resumes = YES, Can post for free = NO, Posting Credits = 1 MEMBERSHIP ID=10 One (single) 60 Day Job Posting 499 USD - - Can View Resumes = YES, Can post for free = NO, Posting Credits = 1 MEMBERSHIP ID=11 Unlimited 90 Day Job Postings 799 USD - Can View Resumes = YES, Can post for free = YES That's it! Please let me know what a good time/cost estimate would be. We would like to get started on this ASAP - within the next 2 days.