We develop smart contracts in Move for Aptos and Sui. Resource-oriented programming with safety guarantees that prevent entire classes of vulnerabilities by design.
Move was created at Facebook (now Meta) for the Diem blockchain project and has since become the programming language for Aptos and Sui — two of the most technically advanced blockchain platforms. Move's resource-oriented programming model treats digital assets as first-class types that cannot be accidentally duplicated, discarded, or reused. Arthiq develops Move smart contracts that leverage these safety guarantees for high-assurance applications.
Unlike Solidity, where developers must manually implement safety checks to prevent token duplication or loss, Move enforces these properties at the type system level. A resource in Move can only exist in one location at a time, can only be created by its defining module, and must be explicitly consumed — never silently dropped. This eliminates entire categories of vulnerabilities that plague Solidity contracts.
Our Move development practice covers both Aptos Move and Sui Move, which share the core language but differ in their object model and execution patterns. We build DeFi protocols, NFT systems, token contracts, and custom applications on both platforms, selecting the one that best matches your performance and ecosystem requirements.
Aptos uses the original Move language specification with extensions for its parallel execution engine (Block-STM). We build Aptos Move modules using the Aptos CLI and framework, leveraging the platform's resource accounts, table storage, and event system for efficient on-chain applications.
Our Aptos development includes fungible asset implementations using the Aptos token standard, NFT collections with the Digital Asset framework, DeFi modules that interact with existing Aptos protocols, and governance systems that leverage Move's type safety for secure voting and execution.
We optimize Aptos modules for gas efficiency and parallel execution compatibility. Aptos's Block-STM engine can execute non-conflicting transactions in parallel, but this requires careful data structure design to minimize read-write conflicts between concurrent transactions.
Sui Move extends the core Move language with an object-centric programming model. Every on-chain entity in Sui is an object with a unique ID, owner, and type. This model provides intuitive asset ownership semantics and enables Sui's parallel execution through object-level transaction ordering.
We build Sui Move packages using shared objects for DeFi protocols, owned objects for personal assets, and immutable objects for configuration and reference data. Our Sui development leverages dynamic fields for flexible data structures, the Kiosk framework for marketplace functionality, and the Sui framework libraries for common patterns.
Sui's object model enables transaction patterns that are impractical on other chains — transferring assets in a single transaction without approval, composing objects from multiple sources, and creating sponsored transactions where a third party pays gas. We design applications that take full advantage of these capabilities.
Move's type system provides safety guarantees that are verified at compile time and bytecode verification time. We leverage these guarantees to build contracts where resource invariants — like total supply conservation and ownership exclusivity — are enforced by the language itself rather than manual checks.
Our testing methodology for Move modules includes unit tests using the Move testing framework, integration tests that simulate multi-module interactions, and scenario tests that replay realistic transaction sequences. We use the Move Prover for formal verification of critical properties, proving mathematical correctness of key protocol invariants.
We also apply manual code review to identify logic errors that Move's type system cannot catch — incorrect access control, wrong mathematical formulas, and economic design flaws. Move prevents many bug categories, but application-level logic still requires human review and thorough testing.
Both Aptos and Sui have growing ecosystems of DeFi protocols, NFT platforms, and infrastructure services. We build Move modules that integrate with existing ecosystem protocols — DEXs, lending platforms, oracle networks, and bridge services on each platform.
For teams considering Move as an alternative to Solidity, we provide migration assessment and architectural guidance. Some applications benefit significantly from Move's safety guarantees, while others are better served by Solidity's mature tooling and larger developer ecosystem. We help you make this choice based on your specific requirements.
Arthiq's Move development practice combines deep language expertise with blockchain engineering experience across multiple platforms. Our Singapore-based team is available for Move projects on both Aptos and Sui. Contact founders@arthiq.co to explore what Move can do for your application.
We develop Move smart contracts for Aptos and Sui with resource-oriented safety guarantees. Build with the language designed for secure digital assets.