Smart contract development
Solidity contracts with exhaustive tests, staged deploys, and upgrade paths designed up front.
A vetted blockchain developer from Sentient Arc comes in at $15–35 per hour, depending on protocol complexity and seniority. Smart contracts, DeFi, and fintech rails, starting with a free consultation.
A bug in ordinary software is a patch; a bug in a deployed contract is an incident with a dollar value attached. The cost of a wrong hire on chain is measured in drained pools, not missed sprints.
Engineers who combine contract-level security instincts with real product sense are rare, and marketplaces cannot vet for them. Most portfolios show testnet toys, not systems that held value.
Contracts are written against exhaustive test suites, fuzzed where value concentrates, and deployed in stages: testnet, guarded launch, then full exposure. Upgrade paths and admin keys are designed, not improvised.
The work does not stop at the contract boundary. We build the full flow around it: indexing, frontends, wallets, and the payment or fintech integrations that connect on-chain value to your product.
Solidity contracts with exhaustive tests, staged deploys, and upgrade paths designed up front.
Swaps, pools, staking, and token flows modeled and tested before a single unit of value moves.
NFT marketplaces and exchange builds, from matching logic to custody-aware architecture.
Payment gateways, wallets, and on/off-ramps wired into the product with compliance in mind.
Plan for $15–35 per hour, depending on protocol complexity and seniority. A free consultation scopes the contracts and flows before anything is billed.
EVM chains are the core: Solidity with Hardhat or Foundry, Ethers.js frontends, and the indexing layer around them. Other ecosystems are scoped per project during the consultation.
Yes. Takeovers start with a review and a test suite around the current behavior, so changes and redeploys happen against evidence instead of hope.
Yes. Most engagements are full-stack web3: the contracts plus the frontend, wallet flows, and indexing that turn them into a usable product.