Bojidar - Google isn't going to provide support for 3rd party use of a project that they've open sourced.
Sumant - There are a number of developers on this list who've used Tesseract in their own applications or created custom OCR solutions based on it. One or more of them may be willing to help if they've currently got availability, but you haven't given much detail about what you need - full application development (what language/platform?), image pre-processing pipeline, training for new fonts/languages, general question answering, etc. If you state what you need and ask developers to contact you, you may find one (or more) who meet your needs.
Tom