import java.util.*;
import java.util.regex.Pattern;
import static java.util.stream.Collectors.*;
 
class Ideone {
	public static void main (String[] args) {
		String data = "John Adams (Backend developer) Bob Scott (Frontend developer) (UI/UX designer) Alex Walker (Network engineer)";
        Map<String, List<String>> skills = Pattern.compile("(.*?) \\((.*?)\\)(?! \\() ?").matcher(data)
                .results().collect(toMap(mr -> mr.group(1),  mr -> Arrays.asList(mr.group(2).split("\\) \\("))));
        skills.forEach((n, s) -> System.out.printf("%s has skills: %s\n", n, String.join(", ", s)));
	}
}

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