Hello,
I have familarized with your requirements and decided to place a bid. I am confident we are able to build for you a database structure that will be optimized for high concurency and fast response.
We were recently working on a similar problem. The database contained a few milions of rows distributed in different tables and bound by n:m relations. The information from the tables were dynamically grouped and sorted by a few fields - the process was very, very expensive. Our task was to decrease the response time and keep the high concurency. During this work, we learned a lot about database optimization techniques incl. covering indexes, packed keys, static row size, quick sub-queries and many others. What is the most important, our work was very fruitful - in some cases we noted even 50-100x acceleration!
Based on the above, I think we have all the required qualifications. Additionally, we always do our work on the highest level (please check our reviews on Freelancer.com) and have good communication skills. We are also interested in building long-term cooperation.
Should you have any questions, please do not hesitate to contact me. Thank you!
Best regards,
Jacek Francuz