For the technology aspect of your question, I couldn’t answer.
BUT—I could not let this question go without telling you that there is a great, great need for GOOD career interest surveys for a variety of reading and grade levels, that consider a wide range of skills, interests, traits, etc- and actually are usable.
Most career interest surveys give choices from… 12–15 fields, if that many. We know there are way more than 12 career fields out there. I taught career classes when I was a teacher and it was almost ridiculous how many of the career assessment surveys were limited and unhelpful—almost like something to ‘fill time’ or ‘pretend that we know what we’re doing tests’ rather than tools to actually help students. Or the tests would find interest areas with no analysis of skill.
I never found a good, wide range, balanced test that covers several areas. It’s baffling how many test results include “writer” as a suggested possible job—seriously… a very few personalities really would enjoy the seclusion of writing, or the hectic fast-paced on your feet 24/7 demands of journalism. I wanted realistic results, not canned results. So, I created my own combination of tests to make them actually worth something.
My friend works in job recovery/adult job placement and he talks about how people need career guidance at adult ages as well, but need more specific tools that take their interests into consideration, but also their prior experience, or transferable skills. If you could create assessments that truly help this population, there is a hoard of vocational rehabilitation programs that would go for that type of assessment.
I would integrate information from several sources—from Strengths Psychology, from Positive Psychology, from MBTI, skills vs. interest assessments. If this is something you love to do—PLEASE do it… and let me know when you’re done! :D