Planetside shipyards, like the one for the Enterprise in Star Trek (2009), never really made much sense to me. You'd expend a lot of energy and put a lot of stress on the ship trying to get it into orbit. It might make sense for something like an Intrepid class or a runabout, but it makes little sense for a capital ship. (I realize the JJ-prise flew around in every planetary environment but lava, but I guess we can assume they were using 24th Century future-tech.) Anyway, since it's the future, and the materials of a ship's hull are probably resistant to things like corrosive gases like the one in the atmosphere of Venus, why not just have a shipyard in the upper atmosphere of Venus. After all, much of the internal volume of a ship is going to be breathable air, and in the Venusian atmosphere, that's a lifting gas, so your spaceship will basically be an airship. Well, not completely, but enough that you can get to orbit with far less thrust than you'd need to get off the Earth's surface. It helps that the gravity of Venus is only about 89% that of Earth. I was thinking floating shipyards, kept buoyant by the massive internal volume they'd need to construct ships internally. The ships would be built suspended from support structures above a massive door. The doors would open and the support structure would slide down and release the completed ship, allowing it to exit the shipyard without loosing precious breathable air that doubles as your lifting gas. The doors close, and any atmosphere that manages to seep into the interior is processed out of the air by the life support systems. Plus you can run the entire operation on solar panels covering the entire surface of the shipyard, due to the high albedo of the atmosphere and proximity to the Sun. You're basically getting bright sunlight from every direction.