Let me show you the backdoor: Find a company whose open source projects you are interested in. Dive in and and start fixing things. Then if you really like it after a couple weeks start nudging around for a job. If you do good work they'll just give it to you, no bullshit funnel required. I like this method because you aren't just doing l33t coding exercises to work on some sight unseen codebase that makes you suicid…
I totally love this suggestion btw, but I think it serves when you are doing this continuously rather than when you are pressed for the job asap.