Blockchain & Web3
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Blockchain for Real Business Problems
The value in blockchain isn’t the technology — it’s what it makes possible: immutable records, trustless transactions, and programmable business logic without a central intermediary. CimpleO builds blockchain solutions for teams with specific, concrete use cases: supply chain provenance, digital asset issuance, DeFi protocols, and enterprise process automation where transparency and auditability matter.
Smart Contract Development
We write and audit smart contracts in Solidity (Ethereum/EVM-compatible), Rust (Solana), and Go (Hyperledger). Security-first development — every contract goes through formal review before deployment because on-chain bugs don’t get hotfixed. Upgradeable proxy patterns where your business logic needs to evolve.
DApps & Web3 Frontends
Decentralised application development with wallet integration (MetaMask, WalletConnect), token gating, on-chain data reads, and transaction signing flows that non-crypto users can actually navigate. Built with ethers.js or web3.js, connected to your smart contracts via typed ABIs, with proper error handling for the realities of blockchain UX.
Enterprise & Private Blockchains
Not every blockchain use case is public. We implement Hyperledger Fabric for enterprise applications where a consortium of known participants needs a shared, tamper-proof ledger — supply chain traceability, inter-company reconciliation, credentialing systems, and document provenance with privacy controls.
DeFi Protocol Development
DEXs, lending protocols, yield strategies, and staking systems — we build DeFi primitives with the economic design and security rigour the space demands. Token economics modelling, liquidity analysis, and integration with Chainlink oracles for reliable off-chain data feeds. Audited before mainnet deployment.
What Separates Production Blockchain from Proofs of Concept
- Security audits — every smart contract reviewed for reentrancy, overflow, and access control issues before deployment
- Gas optimisation — contracts written to minimise transaction costs for end users
- Regulatory awareness — guidance on token classification, KYC/AML integration, and jurisdictional considerations
- Testnet → Mainnet — proper staging process with comprehensive scenario testing before production deployment
Discuss your blockchain use case with our team — we’ll tell you whether blockchain is the right solution and what it would cost to build it properly.
Frequently Asked Questions
How much does smart contract development cost?
A single Solidity smart contract with tests and audit: $8,000–$25,000. A DeFi protocol with multiple interacting contracts, governance, and full security audit: $50,000–$200,000+. Enterprise Hyperledger Fabric implementations start around $40,000. Cost scales with contract complexity, the number of attack surfaces, and audit requirements.
Do you audit smart contracts before deployment?
Yes — every contract we write goes through internal security review covering reentrancy, access control, integer overflow, and front-running vulnerabilities. For high-value contracts, we recommend engaging a specialised third-party audit firm (Trail of Bits, OpenZeppelin, Certik) in addition to our own review. We help coordinate that process.
Ethereum or Solana — which should we build on?
Ethereum/EVM for maximum ecosystem compatibility, DeFi composability, and institutional acceptance. Solana for high-throughput applications where transaction speed and cost matter more than ecosystem breadth. For enterprise use cases, Hyperledger Fabric for a consortium ledger with privacy controls. We'll advise based on your specific use case.
Can you build the frontend DApp as well as the smart contracts?
Yes. We build the full stack: Solidity/Rust smart contracts, ethers.js/web3.js frontend integration with MetaMask and WalletConnect, and backend indexing services. You don't need separate vendors for on-chain and off-chain components.
Is blockchain actually the right solution for our use case?
Not always. We'll tell you if it isn't. Blockchain adds value when you need trustless transactions between parties who don't share a database, immutable audit trails, or programmable settlement logic without a central operator. If your use case doesn't require those properties, a conventional database is cheaper, faster, and easier to maintain.