In 2011 we had to rewrite a backend which was architected by a guy who left after his plan didn't work which was effectively a rewrite of the rewrite. I left the company in 2013 and in 2014 they hired him at my new workplace (we had no contact before and this decision was oblivious for me). I left that company when they put him as team lead on my team and several years later I heard from an ex-colleague that they dumped a backend which was architected by this guy.