Blockchain Engineer for LINE MINI Dapps Game

I'm developing a blockchain-integrated game on LINE MINI Dapps and need an experienced blockchain engineer to start immediately.

Key Tasks:
- Research and integrate LINE Blockchain SDK with KAIA chain
- Implement both web and mobile KAIA chain wallet integration (using KAIA Wallet and KAIA SDK)
- Set up LIFF SDK for LINE MINI Dapps environment
- Build ERC20 token transfer system with transaction verification
- Create NFT minting and distribution features
- Ensure secure, idempotent transfer logic

Tech Stack:
- Backend: Node.js/Express
- Frontend: Next.js
- LINE: LIFF SDK, LINE Blockchain SDK
- Blockchain: KAIA chain, Web3.js/Ethers.js
- NFT: ERC721/ERC1155

Ideal Skills & Experience:
- Proven expertise in Web3 wallet integration
- Strong background in token transfer systems
- Familiarity with NFT minting and distribution
- Knowledge of the specified tech stack

Timeline: 3-5 days. Immediate start required.