#!/usr/bin/env perl -l

use strict;
use warnings;

my $text = " \u003cdiv class=\"ja-job-details\"\u003e \u003ch2 "
         . "class=\"title\"\u003eGlobal Service ...";

print "TEXT: $text";

(my $html = $text) =~ s/(00[3-7][0-9a-f])/pack 'H4', $1/eg;

print "HTML: $html";