Hi! I can develop a complete solution for you which includes support for proxies, scraping friends/followers, captcha handling, messaging, emoji support, for both Instagram and Facebook. I will use python, selenium for the job. The deliverables would be 2 scripts 1. Facebook 2. Twitter
Regarding my experience and portfolio, i have developed cloud based saas for Instagram automation & scraping (mass dm, comment, and much more, profile/post/location/hashtag/follower scraping, and more). I am the perfect fit for your project, and can deliver easily in time a reliable and lasting solution. That being said, its not that simple to send bulk messages from a single account, so either you have to play in the limits or you can use bulk accounts to send messages. If you have thought over it, let me know.
For further discussion i will wait for your response, and share my quote then.
Regards,
Hamza Zubair