Finalization of the site on Bitrix

It is necessary to finalize the site, on the editorial office of "Small Business" site catalog (Catalog of goods, personal account) Without payment!
Integration with 1C is ready. All remaining tasks are drawn up in B24
I ask you to respond only with real development experience, Bitrix at the level of the framework.
Understanding OOP and applying in practice. Level not lower than middle
Free working time of at least 4 hours a day

The cost is negotiable