Zethic is a Solidity development company that writes, tests, and audits smart contracts before they ever go live, where a bug isn't a support ticket, it's lost funds. We run a full smart contract audit on every deployment and work across Ethereum and EVM-compatible chains.
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85%
Long-term Partnerships
75%
Mid-to-Senior Engineers
5+
Avg. Years of Engineer Experience
98%
Would Recommend Us
Chances are one of these is true.
What you get from this work.
Our Solidity development services move in stages: specification first, then implementation, then audit, then deployment. Each piece below can run as a standalone project or as one connected process.
Custom contracts, tokens, and DeFi logic, built to specification.
Custom smart contractsERC-20 and ERC-721 tokensDeFi and DAO logicMulti-chain EVM deployment
We write smart contracts against a clear specification, covering token standards, access controls, and business logic the product needs. If the product needs work beyond the contract layer, our broader blockchain development services cover that ground too.
Manual review, automated scanning, and edge-case testing before launch.
Manual code reviewAutomated vuln scanningTest coverage for edge casesAudit report, fixes verified
Every contract gets tested against the failure modes that actually drain funds: reentrancy, integer overflow, access control gaps, and logic errors under adversarial input. A real audit isn't done until fixes are verified.
Storage and function-call efficiency, benchmarked before and after.
Storage layout reviewFunction call efficiencyBatch operations built inCost comparison before/after
Fee optimization happens after correctness, since a contract that's cheap to run but does the wrong thing isn't actually cheaper. We benchmark real transaction costs and tighten the code that runs most often.
Launch with monitoring and an upgrade path already planned.
DeploymentContract monitoringIncident response planningUpgrade path design
Deployment is not the finish line. Smart contracts are largely immutable once live, so we plan the upgrade path and monitoring before deployment. If the product needs the surrounding application built out, custom application development services pick up the rest.
Blockchain Development, our team for the full-stack work around every contract.
Why teams pick us for this.
Skipping this means code against a moving target - and moving targets are how exploits happen, the same discipline behind digital transformation services.
Our Solidity development services build the audit into the timeline as its own phase, with dedicated time to find and fix issues, not squeezed in later.
We benchmark actual transaction costs before and after optimization, so the team knows the contract is cheaper to use, not just assumed to be.
Monitoring, incident response planning, and upgrade path design are part of the same scope, not a separate bill nobody budgeted for.
This is the discovery phase every Solidity development company project starts with, and it is how our Solidity development services, part of Zethic's broader AI and digital solutions, move to a deployed, audited contract.
Talk to us{ 01 }· Week 1-2
We document the contract logic, token standards, and access controls needed, and choose the chain and architecture before any code gets written.
{ 02 }· Week 2-4
The contract gets built against the specification, with test coverage written alongside the code, not bolted on afterward.
{ 03 }· Week 4-5
We run a manual and automated audit against known exploit patterns, fix what gets found, then reduce gas costs on the corrected code.
{ 04 }· Deploy+
The audited contract deploys to launch with monitoring in place, and we stay available for incident response and any planned upgrades.
Questions, answered.
A Solidity development company specializes specifically in writing, testing, and auditing smart contracts on Ethereum and EVM-compatible chains, a narrower and deeper focus than general blockchain work across consensus mechanisms or non-EVM chains.
The audit is part of the same project scope, not an optional add-on, because a Solidity development company that treats security as optional isn't worth hiring. We don't consider a contract finished until audit results are fixed and re-verified.
A single audited contract, like an ERC-20 token launch or a simple DeFi mechanism, usually runs four to five weeks including the audit. A more complex system with multiple interacting contracts typically runs eight to twelve weeks.
Both. Our Solidity development services include standalone audits of existing contracts, not just ones we write ourselves. For contracts touching regulated money movement, this often overlaps with the same compliance thinking behind KYC and AML for fintech apps.
This is why incident response planning happens before deployment, not after. If the contract has an upgrade path designed in, we can patch it. If not, we help coordinate a response, part of why architecture decisions get made carefully before launch.
Tell us what stage your contract is at. A senior engineer replies within one working day with a starting point.
Tell us the contract
What it needs to do, which chain, and whether real funds are at stake. We sign an NDA before specifics.
We specify before we build
A senior engineer documents the logic and access controls before any code gets written.
Audit, not just launch
We don't call a contract done until audit results are fixed and re-verified.
Tell us what stage your contract is at. A senior engineer replies within one working day with a starting point.
