twelvebit / engineering
Smart contract development
Start with the rules your product needs to enforce. We help translate those rules into contracts, connect them to a usable application and plan how the system will be operated after deployment.
Discuss your projectWhat can we build?
- Contract implementation for tokens, NFTs and application-specific transactions
- Wallet integration and frontend flows for signing and confirming transactions
- Contract tests, deployment scripts and integration documentation
- Review of permissions, upgrade behaviour and failure paths
Technology and stack
Solidity for EVM contracts, JavaScript and TypeScript for application integration, and React or Next.js for web interfaces. The target network, contract tooling and wallet support are agreed around the product requirements.
How does delivery work?
- 1.
Define assets, roles and invariants before implementation. Agree which decisions belong on-chain and which can stay in the application.
- 2.
Implement contract logic and test expected behaviour alongside rejected transactions, permissions and boundary conditions.
- 3.
Integrate wallet flows on a test network. Review transaction feedback, deployment configuration and operational responsibilities.
- 4.
Prepare a release and handover. Where an independent security audit is needed, allow time to address findings before deployment.
Portfolio example: 8bit Arcade
Our portfolio records smart contract deployment work for 8bit Arcade. This is an example of the deployment side of our contract work; the project scope and release requirements determine the approach for each engagement.
Read our case studiesView 8bit ArcadeDoes contract development include a security audit?
A code review and an independent security audit serve different purposes. We agree review scope during discovery and identify when a separate audit is appropriate. Testing and reviews reduce risk; they do not guarantee that a contract is free of vulnerabilities.