People want to meet new people all the time, the more the better and preferably close to their own personality. The problem is: if you just say, 'hey guys, you should meet up, you are both coders, you should like each other' or in a real dating environment, 'hey guys, just meet, you are both singles' it won't work.
People need some guidance, some hook and reason why to meet and more important what to talk to each other, small talk without setting people into context won't work. This app is missing the hook to meet up, just grabbing a coffee together because both code in similar languages is no sufficient plug or starter.
Examples that work:
- On a typical network event you have small hooks like the presentations shown. There're great starters to get into small talk and carry on with deeper conversations later. This environment leaves the agenda open about who you talk to and what you talk about. That's good and keeps conversations and new encounters thrilling.
- On a hackerthon you have even stronger hooks because you have to work together or you just have a very good reason to talk to each other—mingling will happen automatically and excitement wil be at its max because everything is new (people, context, tech) and you face a challenge which you have to solve in a short time which makes it even more thrilling. The stronger these kind of excitements are the stronger the initial bonding will be between the participants after the event. And this bonding is everbody's goal: not just meeting random people for coffee but meeting like-minded people in order to build strong relationships with them. Or to put it another way: the context (=> the event/guide/task/excitement) is the actual cause for strong bondings and relationships and not similar personalities or preferred languages. Interactions between people are context and behavior driven and not because of similar profiles.
You have to give people a task, a mission. Just telling them to meet and talk will make them feel awkward.