For Husserl consciousness is absolutely self-positing (so much so that the annihilation of the world leaves it untouched) and as such is absolutely constitutive of the meaning of transcendent reality.
For Heidegger human being in its facticity does not posit itself over against the world and then constitute it presuppositionlessly from some supreme vantage point. Rather, we find ourselves already thrown-open (posited into possibilities), which possibilities in turn constitute the meaningfulness or being-dimension of the things we meet in the world.
As already thrown-open (geworfen), we are already opened up (vereignet) by possibility, and we attain authentic selfhood, not self-position, by personally reappropriating our openness.
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See that post with different algorithms in metabole
See the journal French Metablog with today different posts