The short answer
Publish and document your work, then propose a specific talk with a clear argument rather than a practice profile.
Programmers look for a subject the audience will travel for. A talk about a specific design problem you solved is easier to place than a retrospective of your practice.
Send a short proposal with the argument, the evidence (built work, research, data) and your availability. Publishing the same thinking beforehand gives programmers something to point to.
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