A lot of startups are choosing Flutter when developing software applications. The primary reason is that the time-to-market is significantly reduced with this SDK (software development kit). And the faster you launch your new product - the higher are the chances that you will succeed and outwin your competitors.
Another reason is a great cost-saving effect. You require one team of developers to launch your application on multiple platforms. However, you should bear in mind that Flutter developer hourly rate is reasonably high. The community of Flutter developers is big and growing all the time. Nevertheless, the demand is even higher. This, be ready to offer a competitive rate and additional bonuses and headhunt heavily, especially for senior developers.