Mirrorfall by Grace McDermott

Twenty years ago, Stef Mimosa died, but that’s OK, she got better. Now, she’s a code monkey for hire, doing a bit of hacking on the side. This is fortunate as Dorian Gray is looking for code monkeys to work on an usual code, one that could reunite a monster with the woman he loves.

After things go awry, Stef comes face to face with the man who brought her back from the dead - a man she’s always thought of an angel, which…technically he is.

He recruits her, and shows her the world of magic around her - one filled with freaks, monsters, talking trees, undead mermaids and an entire department who have alarms that go off when their favourite webcomics update, and shows her that even a crazy, scared, directionless geek who relies on the voice in her head can have a place in the world.