Once Human Modular Building System

I’m creating a building feature for the game “Once Human” and I need a developer who can design a fully-functional modular system where individual pieces snap together cleanly in-game. The focus is purely on the building aspect—no character customisation or crafting for now—so every hour can be spent perfecting piece-to-piece alignment, snap rules, rotation handling and collision checks.

Here’s what I expect at hand-off:

• A library of core building pieces (walls, floors, roofs, stairs, railings) set up to snap on a grid and also edge-to-edge for more organic layouts.
• Scripts or blueprint logic that control snapping distances, pivot points and dynamic feedback (highlighting valid / invalid placement).
• Clear, concise documentation covering how to add new pieces and how the snapping rules can be extended.

Unity or Unreal experience is fine as long as the final solution integrates smoothly with the Once Human toolchain (it’s Unreal-based under the hood). Clean, well-commented code and an eye for optimisation will be crucial because this feature will need to scale to multiplayer sessions.

If you have shipped a similar system before, show me a short video or repo link and let’s talk about timelines.