I am a software developer.

Legal stuff: Please don’t contact me about photo permissions. Everything is covered below:

You may, at your option, use any photo that I have licensed under a 2.0 series Creative Commons license under the 4.0 (or 2.5 or 3.0) series license with the same license elements instead. That is, if I have licensed a photo under CC-by 2.0, you may use the photo under CC-by 4.0 instead if you so choose. This permission does not extend to photos that I have not marked as CC-by licensed! If I have not marked some photo CC-by, I usually have a reason not to.

Any license that I grant to photos hosted on Flickr is a grant only under my copyright and/or neighboring right to a photograph. I don’t grant any license or waiver for third-party rights, and I don't grant any warranty of the absence of such rights. You should exercise caution in use of the photos if you have a reason to suspect that a third-party release or waiver could be necessary. (For example, France has some pretty unreasonable policies regarding photos of buildings. Moreover, none of my photos come with a model release.)

You should assume it would cost me upwards of €250 per hour to get a contract drafted by you reviewed for legal issues and other implications, so please consider this before suggesting that I sign anything drafted by you or accept any money from you. Seriously, just pay your lawyer to figure the above Creative Commons stuff out. (In particular, be sure to search for the words "Technological Measures" in the license.)

Missing EXIF: The older photos that have “PDC” in the description and lack EXIF were shot on Kodak Gold 200 film using a Canon EOS 500N camera. The pictures were scanned from the film and written on Kodak Photo CD at the resolution of 3072 pixels by 2048 pixels.