I'm a native Javanese. It's my first language and then Bahasa Indonesia and English. I speak with my family in Javanese.
When I was a kid, I always read Javanese magazines, but in roman letters, not Javanese letters. And then I've spent three years living in Surakarta (Solo) when I was in college. That's when I was speaking in Javanese most whole time. I also fluent in both level of Javanese language, ngoko (lower) and kromo inggil (higher).
If you think I will able to complete your job, please contact me. My recent job will be finish in this Monday and then I'll go for yours.