Developer 1C Bitrix Site Management

We are an agency. We are looking for a developer of 1C Bitrix for one single project in the banking sector, which will be developed for years on an ongoing basis. You need to be constantly in touch. Spend from a few hours a day to a full day in case of urgent improvements. We want to understand how quickly and how expensively you solve various problems. To do this, please indicate in the response an example of your work on the project, preferably in the field of finance, and give a detail of the time spent on the processes. For example: development in Ajax of dynamic directory output on such and such a page for so many hours.