For contracts where a mistake can't be quietly patched later
Hire Blockchain Developers
A smart contract bug cannot be quietly patched the way a normal application bug can, once it is deployed and holding real value, a mistake is often permanent. These engineers are tested against that exact stakes level, then placed to write contracts that survive the scrutiny an audit and an attacker both bring.
- Profiles typically within two business days
- Replacement Assurance: If an engineer is not the right fit, a replacement from our own team starts within ten business days of your request, at no extra cost
- You interview before placement if you want to
- At least four hours a day inside your core working hours. Two hours plus a daily written handover for the US West Coast
- 14-Day Risk-Free Trial: For your first engineer on a time-and-materials engagement. Up to 14 calendar days or 80 logged working hours, whichever comes first. End within the trial and pay nothing for trial hours. Continue beyond it and those hours are billed at the agreed rate. Unpaid trial work remains ours if you stop
How we evaluate a blockchain engineer
The tasks, the signals and the onboarding, walked through by the people who run them.
90 secSample frame · video pending01Published, not promised
The assessment behind every engineer we send.
The blockchain bar is published, not assumed: five competencies, the exact task behind each, and the shortcut that ends a candidacy. Most interviews ask which chain someone prefers. This one asks whether a contract would survive an audit.
What we listen forWhether they catch the exploit before deployment, not after a loss.
Review a contract with a withdraw function that sends funds before updating the caller's balance. Walk us through what you find.
- What strong sounds like
- Identifies the reentrancy vulnerability immediately and explains the checks-effects-interactions pattern as the fix.
- What gives us pause
- Reviews the function for logical correctness without catching that the ordering of operations creates a reentrancy vulnerability.
Solidity · Rust (Solana) · Web3.js/Ethers.js
Ethereum · Layer 2s · IPFS
Hardhat · Foundry · Slither
OpenZeppelin · The Graph · Tenderly
02Who you actually meet
The bench, priced by seniority.
Three seniority tiers, priced honestly, and the engineers who fill each one today. Real names and photos take their place as soon as we can share them, and the standard stays exactly the same.
Engineer
Features scoped tightly enough to ship inside your review bar, every time.
The right first hire when your seniors already set the standard.
$2,900–3,700per month
Senior
The hard module nobody else wants to own, taken end to end.
Ownership of a surface, without adding a manager to your headcount.
$4,000–5,000per month
Lead
The workstream's decisions, made daily, so nothing waits on a meeting.
One accountable voice for a pod or initiative that can't afford to drift.
$5,300–6,600per month
Blockchain engineer
3 yrs · US East overlap
Caught a reentrancy vulnerability in a staking contract before mainnet deployment
- Solidity
- Hardhat
- Slither
Senior blockchain engineer
6 yrs · UK + EU hours
Cut a contract's gas cost enough that users stopped complaining about transaction fees
- Foundry
- OpenZeppelin
- Ethers.js
Lead blockchain engineer
8 yrs · EU + US split
Owns the audit-readiness standard three deployed contracts have now passed clean
- Architecture
- Layer 2s
- Tenderly
- The Graph
Indicative ranges, representative profiles. Exact figures and named engineers arrive with your shortlist.
Weighing this against a freelancer, a direct hire or a marketplace? See the honest comparison
03From stated problem to first change
Four steps, each closing on evidence.
This process tests security judgement, not enthusiasm for a particular chain. Nothing is owed if you stop at any step along the way.
Define the security problem
We map where your contracts' security or audit-readiness is actually at risk. The brief names that gap, not a list of chains to know.
A brief your leads signMatch against your contracts
Candidates are screened against your actual chain, your risk tolerance and your review culture. Three engineers who understand your contracts beat thirty who list Solidity on a CV.
Three fits, not thirty CVsAssess on the real tasks
Your team can watch the vulnerability-review and gas-reduction exercises directly. What shows up is security judgement, not enthusiasm about a particular chain.
Evaluation you can watchOnboard inside your process
Access, standards and a first bounded, tested contract change. Continuity cover keeps a departure from ever becoming your emergency.
A merged change in week one
04Evidence and proof
Engineers who caught it before the audit, or the attacker, did.
Blockchain proof is a vulnerability caught before deployment, not a clean audit report bought after the fact. Every record here waits for written client approval before production.
Explore case studies
A reentrancy vulnerability caught before a single dollar was deployed.
Vela Ledger's staking contract had a withdrawal function vulnerable to reentrancy, found during an internal review before mainnet deployment. An embedded blockchain engineer applied the checks-effects-interactions pattern and the fix passed external audit clean.
- Funds at risk before deployment
- Zero, caught pre-launch
- Audit result after fix
- Clean
He found a reentrancy risk our own team had missed twice, in the interview task, before touching our real contract.
Sample · pending client approval
The gas reduction she made brought a transaction cost down enough that users actually stopped complaining.
Sample · pending client approval
05Three shapes, one standard
Add an engineer, a security pod, or a practice.
Most teams start with one engineer reviewing and hardening existing contracts. Some need a pod that owns contract security end to end. Where a whole protocol needs building from scratch rather than one role filled, we point you to the practice instead.
- Team extension
One named engineer
A single blockchain specialist inside your direction and your reviews. The smallest commitment, and the usual first step.
- Delivery pods
A security pod
A pod with its own lead that owns contract security and audit readiness end to end. You set priorities while the pod carries delivery.
- Product engineering
The practice, not the person
Where a whole protocol needs building from scratch rather than one role filled, product engineering takes that scope on instead.
06Straight answers
Asked before a blockchain hire is signed.
01What does a blockchain engineer actually do day to day?
Reviews contracts for vulnerabilities like reentrancy before deployment, reduces gas costs against actual usage, and designs upgrade paths that protect existing users. The unglamorous majority of the work is scrutiny, since a deployed mistake is rarely quietly reversible.
02Do you hire for Ethereum, Solana or another chain specifically?
Matched to your actual chain. Security and gas-reduction judgement transfers across ecosystems, then the evaluation confirms familiarity with whichever you build on.
03Can we run our own interviews as well?
Yes, the published tasks are built to be reused directly. Several clients now run the vulnerability-review exercise themselves in later hiring rounds.
04How fast can a blockchain engineer start?
A shortlist arrives within days from a bench evaluated continuously. Real start speed after that tracks how quickly your side can grant repository access.
05Who manages the engineer day to day?
Your leads set priorities and hold the security standards. We take on the employer side of it instead: continuity, payroll, replacement exposure and the handoff when plans change.
06What if the engineer is not the right fit?
Raise it as soon as you notice and the replacement is our cost. The next engineer is given the exact reason it missed, so repeats are uncommon.
07Do your blockchain developers use AI coding tools?
Yes, openly. AI drafts boilerplate and test scaffolding quickly; the engineer stays accountable for every security review, gas-reduction decision and merge that reaches your contracts.
08How does pricing work for a hired blockchain engineer?
The bands above outline the honest range; the shortlist pins the exact per-engineer figure. No placement fee, monthly billing, and the notice period is the only exit term.