Solidity Developers Keep Contracts Safe Before and After the Audit
Smart contract engineers screened on exploit paths, gas limits and upgrade risk, not on whether they can compile a token contract.
We found 4 available Solidity Developers
Reentrancy, gas limits, upgrades: where Solidity code breaks first
Cortance's Solidity developers are smart contract engineers who have written, audited and fixed EVM code that runs on mainnet. The Solidity group in our network is four engineers, three of them senior, with 12 Solidity projects on record, from a decentralized exchange's perpetuals engine to a prediction-market oracle.
We screen on the assumption that an audit does not make a contract safe. CoinGecko's 2026 State of Crypto Security Report found that audited protocols accounted for 88% of the $3.63 billion lost across 245 incidents between January 2025 and July 2026. The engineer who writes and maintains a contract has to catch what changes after the auditor's snapshot, so that judgment is what we test for, not Solidity syntax.
What does Solidity work demand that backend work does not?
A backend bug can be patched in the next deploy. A deployed contract keeps running with its bugs, and every function that moves value is exposed from the first block. These are the three failure modes our code review looks for:
- Reentrancy through token hooks. Alexandros A. co-wrote CALL, an early ERC777 token on Ethereum, and saw the project wind down because the standard's receive hooks made reentrancy too easy to trigger. An engineer who has lived through that puts state changes before external calls without being told.
- Gas limits that tighten as state grows. On the Augur Lituus oracle, a standing design constraint is keeping critical operations inside the block gas limit as the protocol's history grows. A function that passes tests with ten records can fail on mainnet with ten thousand.
- Storage layout in upgradeable contracts. Proxy and Diamond (EIP-2535) upgrades let a team fix code after launch, but one reordered variable can corrupt state that holds user funds. When a brief involves upgradeable contracts, we shortlist engineers whose project records show upgrades on live systems.
Audit findings, takeovers and contracts already on mainnet
New contracts are only part of Solidity work. On MESI, Oleh C. designed the token, sale, vesting and multisig treasury contracts, reached 98% test coverage and applied the fixes from an earlier audit before verifying the token on-chain. On KittieFight, Alexandros A. took over a Solidity codebase another team had started, audited it and fixed the edge cases in its escrow and payout logic before deployment. That is the profile we match to a team with a deployed contract, an open audit report, or a codebase whose original author has left.
Pair Solidity with the off-chain code around it
A contract rarely ships alone. TypeScript appears in 7 of the 12 Solidity projects in our network, usually with Ethers.js or Web3.js for the scripts, integrations and front-ends that call the contracts. Two of our Solidity engineers also write Rust for off-chain engines, and at Akave, Oleh C. built the event indexer that moves on-chain activity into a structured database. Alexandros A. went the other way on Injective, moving exchange logic from Solidity contracts into Go modules on a Cosmos SDK chain. When a brief needs contracts plus the service that reads them, we match one engineer who covers both, or pair the contract work with a Rust developer.
One contract review, one senior engineer, or a small team
Rates for middle to senior Solidity engineers in our network typically run $35 to $60 an hour, and you see each engineer's rate and project record before any interview. You can bring an engineer in three ways:
- A senior engineer to review a contract, or design token economics, before a mainnet deploy.
- A dedicated engineer or small team to take a DeFi protocol, token sale or NFT product from architecture to launch.
- Staff augmentation to add Solidity capacity to a wallet, bridge or exchange feature already in progress.
If you are still deciding whether the role needs a Solidity specialist or a broader blockchain engineer, our guide to hiring blockchain developers covers that split.
Send us the chain, the token standards and the audit status of your code, and we will come back with a matched Solidity shortlist within 30 minutes.
The Solidity code review every candidate passes before joining our network
Every Solidity engineer in our network passes a live code review and a reference check. For security-focused roles we also look at the audit work they have done: findings, proof-of-concept scenarios and the fixes that shipped, rather than a resume line that says security-minded.
In the code review we look for the habits that stop expensive bugs: state changes before external calls, explicit access control on every function that moves value, storage layout that survives an upgrade, and tests that cover failure paths as well as the happy path. A candidate who leans on a static analyser is fine. One who cannot explain what the analyser missed does not join the network.
From Solidity brief to shortlist in 30 minutes
Four steps, no job post and no unvetted applicants to sort through.
- 01
Send the contract scope
Tell us the chain, the token or protocol standards involved, whether the code is new or already deployed, and whether it has been audited.
- 02
We match on project history
We compare your scope with what each engineer has built and fixed on Solidity projects, not only with the skill tags on a profile.
- 03
Review the shortlist
Matched profiles arrive within 30 minutes, with rates and project records visible before any interview.
- 04
Interview and start
Talk to the engineers directly, pick one and agree the engagement shape: a contract review, a single senior engineer or a small team.
Solidity projects our engineers have shipped, fixed and audited
Each card links to the engineer's profile. Details come from the project records engineers keep on Cortance.
ERC-7208 tokenization platform on the Diamond Standard
As lead blockchain engineer at Nexera for about four years, Alexandros A. designed the tokenization platform's on-chain backend around EIP-2535 facets and co-authored ERC-7208, the standard it runs on, including its reference implementation.
Somnia audit fixes and Akave gas savings
On the Somnia network's node-management contracts, Oleh C. resolved and tested 2 Critical, 7 High, 10 Medium and 7 Low audit findings within two weeks. At Akave he cut gas in high-traffic storage contract functions by 25 to 40%.
DeFi security audits and an MEV-aware arbitrage engine
At Cyber Unit, Ilya B. audited DeFi and EVM contracts with Slither and Ganache and wrote proof-of-concept exploit scenarios with fixes. He also built a Rust and JavaScript engine that simulates arbitrage routes across Uniswap V2 and V3 pools within one block.
Pair Your Solidity Developers
With Related Experts
Most Solidity projects require additional expertise. Whether you need front-end devs, DevOps specialists, or database architects, we connect you with professionals who integrate with your Solidity team.
Answers for Common Solidity Hiring Questions
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Solidity developer or smart contract auditor: which does my project need?
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