I’m leading the MVP development of a space-themed, cross-platform metaverse where players can truly own ships, stations and resources through a token-driven economy. The immediate priority is bullet-proof blockchain integration on Polkadot, and that starts with well-architected smart contracts. I’m looking for a developer based in the US or Europe who can design, code and test the ink! smart contracts that will: • Mint, transfer and burn our space-based NFTs • Handle the in-game utility token (staking, rewards, fees) • Enforce marketplace trades and royalty logic • Plug cleanly into our existing Substrate back-end and Unity front-end Deliverables 1. Production-ready ink! contracts, optimised for weight and security 2. Comprehensive unit + integration tests (cargo test & cargo contract test) 3. Deployment scripts for Rococo → mainnet migration 4. Markdown docs covering APIs, message flows and upgrade paths Acceptance criteria • Passes basic and advanced security audits (re-entrancy, overflow, access control) • Compiles with ink! ≥4.0 and Substrate 1.0-compatible toolchain • Achieves ≥90 % code coverage and <5 % weight variance from spec • Clean hand-off to the broader, multi-nation dev team We already run a CI pipeline on GitHub Actions and can spin up a dedicated relay chain for integration work. If you’ve shipped contracts on Polkadot or Kusama and enjoy turning complex game logic into lean Rust code, let’s talk specifics and timelines.