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I think these guys can definitely help you https://scand.com/company/engagement-models/outstaffing/ In addition to helping you develop the project you need, they can expand your team, because they provide IT outstaffing services. This is very beneficial for different kinds of projects, because you can save time on staffing and have full control over the development process and you will have professionals ready to work. I think this is exactly what you need for young companies. I've used SCAND a few times myself, so I recommend them.