High-Quality Backlinks for SaaS

I'm looking to build high-quality backlinks for my SaaS platform. We're in the digital workflow / online form builder / automation space.

This is my question to freelancers so please read. I want to know:
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Where the backlinks are coming from (sample sites, DA/DR range)?

Whether they’ll be dofollow and contextual (in-content)?

If links will be tailored to my niche (SaaS, form building, automation)?

How many links are included, and over what time period?

Will I get a report with live URLs, anchor text, and placement details so I can inspect?

Are these manual placements, or are you using automation or AI-generated sites?

Do you also offer guest posting or digital PR for higher-authority placements?

My main goals are:

Improving domain authority over time

Driving organic traffic through relevant links

I would like to avoid spammy, black-hat tactics