Increase 40+ Domain Authority

My site’s current Domain Authority is lagging behind competitors and I want it above 40 as quickly and sustainably as possible. I’m focusing on Technical SEO improvements rather than content or outreach, so the work will revolve around fixing the nuts-and-bolts issues that hold authority back... (Budget: ₹1500 - ₹12500 INR, Jobs: Internet Marketing, Link Building, Moz, SEO, Website Analytics, Website Optimization)