hazehire a defi developer
defi that holds up under pressure: vaults, staking and integrations with the protocols you build on, with invariants tested before real money touches them.
what i build
- erc-4626 vaults and yield strategies
- staking and reward distribution that stays correct with many users
- integrations with uniswap (v3 / v4 hooks), aave, permit2 and bridges
- keepers and automation for rebalancing and harvesting
- oracles, price checks and circuit breakers
- dashboards that show positions, apr and risk clearly
why hire me
- invariant tests for the money rules (“total shares always match assets”)
- fork tests against real mainnet state before launch
- clear docs on every privileged role and risk
- built the approvals, signing and refuel tools on this site: lives in this world daily
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
can you integrate with an existing protocol?
yes: uniswap, aave, curve-style pools, permit2, bridges and more, with fork tests against the real deployed contracts.
how do you keep a defi contract safe?
small surface, clear roles, invariant + fuzz tests, fork tests, and an honest recommendation for an external audit when the value at risk calls for it.
do you build the keepers too?
yes: scheduled jobs that harvest, rebalance or liquidate, running on infrastructure you control.
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
- smart contract developersolidity contracts from a spec (or a napkin) to verified mainnet code: tested hard, gas-aware and documented so your team can own it.
- 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.