nested tables in jasper reports using java bean collection as data source

Hello, I am looking for a freelancer to help me build a jasper report using Java Bean Collection as a data source for nested tables. I have a rough idea, but I need someone with the expertise to implement it properly and efficiently. The data complexity for this project is high, and I need someone who has a handle on nested tables and complex data sources. As the data source for the project, I am selecting Java Bean Collection. Any specific layout or format suggestions will be appreciated as I am open to ideas.