BEA chief architect and senior vice president of advanced development Adam Bosworth, who helped engineer WebLogic Workshop, spent his last day at the company on Friday.

WebLogic Workshop helped set today’s trend followed by vendors seeking to simply the construction of Java 2 Enterprise Edition (J2EE) applications by borrowing Microsoft’s Visual Basic development drag-and-drop paradigm in Windows.

Bosworth was both a Microsoft senior and general manager and helped set the company’s XML strategy between 1997 and 1999, and managed development of the HTML engine in Internet Explorer 4.0 and 5.0.

He subsequently left Microsoft to co-found software start-up Crossgain Inc, with other former Redmond executives. Crossgain was subsequently acquired by BEA in 2001.

Bosworth recently demonstrated Alchemy at BEA’s eWorld conference. Alchemy was positioned as providing rich browser-based applications available on- and off-line. According to sources, though, Alchemy was an extremely early proof of concept, and Bosworth made the demonstration earlier than he would have liked.

Bosworth exits follows a bout of executive re-shuffling and re-structuring of sales. Earlier this year, BEA appointed executive president of products Olivier Helleboid to head-up long-term strategy and planning while vice president and chief marketing officer Tod Nielson temporarily took charge of products. The head of North American sales, meanwhile, was replaced after the region failed to meet expectations.

BEA also re-organized sales, creating a General Accounts unit to handle Small and Medium Business (SMB) and Value Added Resellers (VARS).

BEA was unable to comment on reasons for Bosworth’s exit while Google was unavailable for comment.