Blockchain Developer
Hire a blockchain developer with shipped mainnet contracts
Contracts that shipped to mainnet and held real value — not a tutorial fork with the variable names changed. Vetra, a USD-backed stablecoin on Polygon with Chainlink Functions verifying reserves in real time, is the reference.
The part most people get wrong
Blockchain projects fail in public and permanently. A missing pausable modifier, a role granted to the wrong address, an oracle feed nobody verified — any one of them becomes a headline and there is no rollback. The premium is not in writing the contract, it is in the controls around it.
What you get
- →Creator of Vetra (VTR), a USD-backed stablecoin on Polygon PoS where Chainlink Functions writes verified reserve balances on-chain every 4 hours and auto-pauses transfers if reserves fall below supply.
- →Solidity with pausable, ownable and role-based access as design defaults, not afterthoughts.
- →Solana + Anchor + Rust — shipped a Raydium-style AMM DEX with SPL token support and Jupiter Aggregator routing.
- →Multisig upgrade authority (Gnosis Safe on EVM, Squads on Solana). No single key can push a new version.
- →Full test coverage before deploy — Hardhat + Foundry for EVM, Anchor tests for Solana.
- →A written deployment checklist executed in front of two people, plus a written incident response plan.
- →Stripe Connect / Split integration when on-chain flows need real-world commission distribution.
- →Contract audits of other developers' code as a standalone defined-scope engagement.
Proof — shipped and in production
Impact Processor CSR26
An ESG plastic-credit protocol needed dynamic weekly pricing and a 5/45/50 vesting rule on-chain. Stripe Split handles automated commission distribution.
Spraicoin Token + Presale
A new token needed a smart contract and a presale API wired into the existing site. Full implementation guaranteed API security and correct token interaction.
DexSpeed DEX on Solana
Traders leave when the price moves between the click and the fill. Sub-second execution on Solana keeps the order book worth using.
Ethereum DEX Scanner
Real-time swap events on Uniswap V2 needed a Node.js scanner. The Graph subgraph + ethers RPC log scanning fed analytics and alerts.
Frequently asked
Have you deployed to mainnet with real value at stake?+
Yes. Vetra is live on Polygon PoS with real USD reserves behind it. DexSpeed is a live AMM DEX on Solana. Impact Processor CSR26 is an ESG plastic-credit protocol with a 5/45/50 vesting rule and Stripe Split commission distribution. These are not testnet demos.
Will you build a memecoin or an anonymous project?+
No. Every engagement requires a legal counterparty, a stated real-world use case, and a contract with a stop mechanism. This is permanent policy — reputation compounds, and reputation is the whole business.
Do you audit contracts written by someone else?+
Yes, as a separate defined-scope engagement. Code review plus threat model plus written report, typically 5-10 business days depending on surface area. That is independent of writing the contract myself.
This role is also called
- blockchain engineer
- smart contract engineer
- web3 developer
- DeFi engineer
- crypto developer
- tokenization specialist
Start with a written brief
Describe what the business is losing today and what the target outcome looks like. I come back with a concrete plan against that document — in English, Spanish, Portuguese or Polish.
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