Insert Xades-B libraries into our new library that supports Pades

Need extra Xades-B support to our old libraries and put it into our new library that has already Pades support

We need a Java developer with experience with crypto algorithms such as SHA, RSA, ECDA and must have hands on experience with at lease one of the following crypto objects: xmldsig, cms/pkcs7, cades, pades, xades, SAML or JWT.  It is not sufficient to have used it in a high level library like Spring-Security. Developer must have experience with the required crypto algorithms/objects via low level libraries such as: bouncycastle, jose, santuario, xerces, pdfbox, ...  

Besides crypto, the candidate must also have a good knowledge of xml and the DOM API in Java.

Project based.  Time and Material, probably about 2 weeks of work