For four years the founders of Interplay have been working below the radar trying to solve a tricky problem bridging the gap between code and design. This week Michael Fitzgerald and Adam Walters are going to reveal the first public beta version of their product, also called Interplay, after building up a waiting list of 15,000 designers and engineers.  Interplay has also just closed its first pre-seed round of €1.2 million led by Irish venture capital fund ACT. Enterprise Ireland (EI) also backed the round as did various interesting angels, including Jimmy Fitzgerald, the president of Paddle, a revenue delivery…