You do not build trust by giving them:

1) You have these issues + my product solves them (Insert Features)

Developers, engineers and other team members get these kinds of claims all the time and they simply just don't build trust and they are so over-used that they don't spark any curiosity among tech folk.

2) "Stop losing time", "Save money", "Be the most valuable player in your team" ... (Insert Benefits)

These might spark some curiosity, but on the other hand, it might even get tech folk mad at you. This is just too vague of a message. Why would they trust you?

How then do you build trust?

Talk about PROBLEMS! You have a product that probably solves some problems, right? Well, talk about them.

Do not talk about how your super-mega-extra-cool product solves them, just make content talking about the problem. How it's usually handled, what are the pains behind it and so on.

Do it long-form, or short-form, on LinkedIn, on Twitter, in video format, podcasts and so on.

Talk about them on places developers usually hang out. Some of the obvious choices are relevant slack groups, tech Twitter, relevant subreddits, Indie hackers, and so on.

Put your company or your name behind it (although, people usually react better to a real person, rather then to a company logo). Be useful! Engage with the community.

Then, after you've built enough trust, you will be able to reap what you saw, and that means, getting all those people that trust you to try out your super-mega-extra-cool product and they'll give you an honest review.

All you need to do at this point is listen!

Don't misunderstand!

You should definitely communicate your features on places like your website, LinkedIn company page and similar.

In the business-to-developers market, this is essential for early-stage startups. When tech-folk come to your website they'll give you a very short speed date to get to know you. Communicating benefits won't tell them if they need you, features will.