Hello,
We are working in data integrations and data migration domain for more than 8+ years. We have experience in working with top rated ALM, CRM, ITMS tools and that too in API level. We know all the scenarios/use cases and edge cases which can come into picture while solving integration and data migration problems.
i.e, conflict situations - same record is updated in both the systems [Master system resolution strategy]
Field mapping - Using xslt transformation technology, field mapping can be easy for user to understand and implement.
File attachments/note/comments synchronization, bi-directional synchronization and book-keeping needed in all such cases.
We have full design ready for solving any integration/migration use cases and even we can demonstrate this with you on different system [As we don't have implementation for systems you mentioned].
With this, we also knows how to model various issuetypes/entities across various systems and how to bridge the model mismatches. We knows most of API interfaces that come across during various past implementations (rest/json-rpc, dll, OTA, OM etc..). Given a chance, we can demonstrate things which we have and also further discuss on your exact requirements.
Hoping to hear back from you.
Thanks
Gaurav