hazehire a smart contract developer
solidity contracts from a spec (or a napkin) to verified mainnet code: tested hard, gas-aware and documented so your team can own it.
what i build
- erc-20, erc-721 and erc-1155 tokens with the exact rules you need (caps, taxes, allowlists, vesting)
- staking, vaults (erc-4626), escrow, payment splitters and claim contracts
- on-chain game logic, raffles and mints with fair randomness
- upgradeable contracts (uups / transparent proxies) done safely, or immutable ones when that’s better
- account abstraction: erc-4337 smart accounts, paymasters, eip-7702 delegations
- uniswap v4 hooks and integrations with existing protocols
why hire me
- every contract ships with foundry unit, fuzz and invariant tests that run in ci
- gas-aware by default: storage packed, hot paths measured with gas snapshots
- clear natspec + a readme, so any auditor or new dev can pick it up
- i build and run the free dev tools on this site: the work is public
see the work: the free dev tools on this site are built and run by me.
how it works
- 01 · messagea few lines about what you’re building, your chain and your timeline.
- 02 · scopea short written scope with a fixed price and dates. no hourly surprises.
- 03 · shiptested code in your repo, deployed and verified, with docs. you own all of it.
pricing
a fixed price for a written scope, agreed before any work starts. small jobs are welcome, and if your budget is tight, i’ll tell you honestly what fits and what can wait for later.
questions
do you write upgradeable contracts?
yes, with uups or transparent proxies, storage-layout checks and an upgrade runbook. if your contract doesn’t need upgrades, i’ll say so: immutable code is simpler and safer.
which chains do you deploy to?
any evm chain: ethereum, base, arbitrum, optimism, polygon, bnb, avalanche, hyperevm, robinhood chain and others. one codebase, deploy scripts per chain.
can you work from an existing codebase?
yes: fixing, extending or reviewing contracts someone else wrote is a big part of the work.
how much does it cost?
a fixed price, agreed before any work starts, based on a short written scope. small jobs are welcome: a single contract, a fix, a review of one file. tell me your budget and i’ll say honestly what fits in it.
how fast can you start?
usually within a few days. small scopes (a token, a fix, a review) often ship within a week; bigger builds get a timeline in the scope.
what do i get at the end?
the code in your repo, tests that pass in ci, deploy scripts, verified contracts and plain-english docs. you own everything and can run it without me.
how do we start?
send a few lines about what you’re building through the contact form or a dm on x (@0xHxxe). i reply with questions, then a scope with a fixed price and timeline.
other services
- dapp developerthe whole product, not just the contract: a fast next.js frontend, wallet connect that works on phones, contract calls that never confuse users, and a ui people enjoy.
- hyperliquid developerhyperevm contracts that talk to hypercore, trading tools and dashboards on hyperliquid’s api: the same work behind the free hyperliquid tools on this site.
- smart contract security reviewa careful second pair of eyes before you ship: manual review, the tests that find real bugs, a written report in plain english and the fixes, at a price that makes sense before (or instead of) a big audit firm.
- token & nft developertokens and nft collections done right: the contract, the mint page, the allowlist, the airdrop and the verified launch, with no surprises in the code.
- defi developerdefi that holds up under pressure: vaults, staking and integrations with the protocols you build on, with invariants tested before real money touches them.