I mainly work with Wrath of the Lich King (3.3.5).
What I can do:
• Spell creation and modification
• Lua scripting (Eluna / AIO)
• C++ development• TrinityCore & AzerothCore & Cmangos/Vmangos support
• Custom systems made per request
• Retroporting creatures, item models, visuals, etc.
• Server...