- pointer arithmetician (idea by someone at Apple)
- problemist
- optimizationeer
- abstractionist
- algorithmist
- encryptioneer
- languagician
- recursionist
- infinite looper
- object orienter
- continuationeer
- {Python,Perl,Ruby,Bash,Lua} scriptician
- thread commander
- multicore general
- concurrencician
- parallelista
- polygoneer
- regular expressionist
- data baseist
- assemblician
- formalisationist
- daemonologist
- pattern matchician
- computational theologist
- mallocateur
- hashonomer
Of course you can prepend a 'Chief' or insert some department prefix, like software, compiler, graphics, etc.
And some more, not so suited for business cards:
- pointer dereferencista (not as cool as the arithmetician)
- incrementer, token carrier, exceptioneer, template instantiator, connection dropper, merge sorter (sounds boring)
- y combinatorian (single letters look ugly)
- lazy evaluationist (i do not want 'lazy' on my card)
- flux compensatorian, cybermancer, technomancer (nice, but fictional origin)
- software gardener, cloud mechanist, software artificer (nice, bot not a neologism)