How much to hire a Full Stack Developer/Engineer?

Hi! Kakatapos lang namin magdiscovery call with an AI integration company sa US and nung nalaman ng boss ko na taga SG mga engineers, he's really open to work with Pinoy developers.

Background samin is 1 year palang yung company, we're recruiters for logistics company sa US and we're currently using Hubstaff, Airtable, OpenPhone and Zapier Table. My boss would like to integrate at least Airtable and OpenPhone with AI sana para if may inquiry yung candidate, hindi na kami agad yung point of contact, parang AI na muna yung magtrytry tumulong (to lessen our workload). Gusto rin sana ng boss namin ng Database where our clients can log in to check their dashboard.

Question is, how much kaya mag outsource dito satin? Gusto nya mag pa develop and take in the engineer full time para may suppport when needed.