On-Chain Systems That Survive an Audit.
Smart contracts, dApps, wallet flows and the backend around them. Written against a spec, fuzzed and threat modelled before deployment, and running on a testnet long before anything touches mainnet.
- No obligation, no sales script
- You own the code
- Fixed scope after discovery
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The Web3 opportunity, minus the hype
Blockchain is good at a narrow set of things and bad at most others. It earns its place when several parties have to agree on one record without trusting each other, when ownership has to be provable outside your own system, or when a rule has to keep holding after you would rather it did not. It makes a poor database and a worse marketing gimmick.
We build the first kind. The honest conversation about whether you need a chain at all happens before the quote, and everything that does not belong on chain stays in a normal backend, where it is cheaper to run and easier to fix.
Non custodial
Users keep their own keys
Verified
Source published and readable on chain
Audit ready
Tests, invariants and a threat model
Five shapes a Web3 build usually takes
dApps
A full application where the wallet is the login and the contract is the backend for the parts that need to be provable. Everything else stays conventional.
Smart contracts
The rules, written in Solidity against a written spec, tested against attack rather than against the happy path, and published so anyone can read what they agreed to.
Wallet integration
Connect, sign, switch network and recover, built so someone who has never held a token can still finish the flow without being frightened by it.
Token systems
ERC20, ERC721, ERC1155 and the logic around them: vesting, staking, allowlists, royalties and the treasury controls that stop one key being a single point of failure.
Web3 platforms
Marketplaces, launchpads and governance portals, with the indexer, the API and the admin tooling that make them usable at more than demo scale.
What actually happens when a user clicks sign
Five hops, and only two of them are yours to write. The other three are where the guarantees come from, and why the failure modes are nothing like a normal web app.
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browser
User
Signs in with a wallet instead of creating another account and another password.
eth_requestAccounts
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MetaMask / WalletConnect
Wallet
Holds the private key and does the signing. Your application never sees it and never stores it.
personal_sign
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React + wagmi
dApp
Builds the transaction, shows what it will cost and what it will do, and handles the rejection properly.
contract.write()
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Solidity
Smart contract
Runs the rules. It does the same thing for everyone who calls it, including for you.
state change
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Base / Ethereum
Blockchain
Orders it, executes it and keeps the result somewhere nobody gets to quietly amend it.
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browser
User
Signs in with a wallet instead of creating another account and another password.
eth_requestAccounts
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MetaMask / WalletConnect
Wallet
Holds the private key and does the signing. Your application never sees it and never stores it.
personal_sign
-
React + wagmi
dApp
Builds the transaction, shows what it will cost and what it will do, and handles the rejection properly.
contract.write()
-
Solidity
Smart contract
Runs the rules. It does the same thing for everyone who calls it, including for you.
state change
-
Base / Ethereum
Blockchain
Orders it, executes it and keeps the result somewhere nobody gets to quietly amend it.
block confirmed
The five layers of the build
Blockchain architecture
- What belongs on chain and what does not
- Chain and rollup selection with costs modelled
- Contract topology and upgrade strategy
- Gas budget per user action
- Off chain storage on IPFS or S3
- Event and indexing strategy decided early
Smart contract development
- Solidity written against a written spec
- OpenZeppelin standards over bespoke code
- ERC20 ERC721 ERC1155 and custom logic
- Access control and role separation
- Upgradeable proxies where they earn their risk
- Gas profiled function by function
Frontend and wallet integration
- React and Next.js with wagmi and viem
- MetaMask WalletConnect and Coinbase Wallet
- Network switching handled for the user
- Transaction previews in plain language
- Pending and failed states designed not ignored
- Email login with an embedded wallet
API and backend layer
- On chain events indexed into a real database
- The Graph subgraphs or a custom indexer
- Webhooks so your systems hear about a transaction
- Off chain data signed and verified on chain
- Rate limited RPC with fallback providers
- Admin tooling that never holds a user key
Security and testing
- Unit and mainnet fork tests before anything ships
- Fuzzing and invariant tests in Foundry
- Static analysis with Slither and Aderyn
- A written threat model per contract
- Testnet deployment with real user flows
- External audit coordinated and re reviewed
Networks and tooling
Chain choice is an engineering decision. We take it from your cost per transaction, how fast finality has to be, and where your users already hold a wallet.
- Networks
- Ethereum Base Arbitrum Optimism Polygon BNB Chain
- Other chains
- Solana Avalanche Near Cosmos SDK
- Contracts
- Solidity Foundry Hardhat OpenZeppelin viem
- Frontend
- React Next.js wagmi RainbowKit WalletConnect
- Infrastructure
- Alchemy Infura The Graph IPFS Pinata
- Security
- Slither Aderyn Echidna Tenderly third party auditors
How a chain project actually runs
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Architecture
We decide what belongs on chain, model the gas cost of each user action, and choose the network from that rather than from fashion.
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Contracts
Solidity written against a written spec, tests written alongside it, and an audited standard used wherever one already exists.
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Internal audit
Static analysis, fuzzing and invariant testing, plus a threat model that names who would attack this and how they would start.
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Testnet
The whole application on a public testnet with real wallets, exercising the failure paths and not only the one where everything works.
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External audit
Coordinated by us where the value at risk justifies it, then the fixes, then a re review before anyone signs it off.
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Mainnet
Deploy, verify the source publicly, and monitor the contract and the treasury from the first day rather than the first incident.
Upgrade paths and pause controls are decided before deployment, because afterwards the code is no longer yours to quietly change.
Where this actually pays off
Tokenised loyalty
Points that are genuinely owned, transferable between members and readable by partner businesses, instead of a number in one company's database.
Supply chain provenance
Each handover written once and timestamped, so a certificate of origin can be checked by the buyer rather than simply claimed by the seller.
Real world asset tokenisation
Fractional ownership of property, funds or equipment, with transfer rules and investor limits enforced by the contract itself.
Payments and settlement
Stablecoin payments that settle in seconds across borders, without a three day wait and a correspondent bank taking a cut in the middle.
Membership and ticketing
Passes that cannot be duplicated, with resale rules and revenue splits applied at the moment of transfer rather than argued about after it.
Shared governance
Multi party decisions where the proposal, the votes and the outcome are all on the record, and none of the three can be quietly edited later.
Questions people ask
Do we actually need a blockchain?
Often not, and we will say so before you spend anything. It is worth it when more than one party has to trust the same record and none of them wants to trust the others, when ownership has to be provable outside your system, or when a rule has to hold even after you would rather it did not. If a database with good permissions solves it, use the database.
Which chain should we build on?
It follows from the cost per user action, how quickly a transaction has to be final, and where your users already hold a wallet. Most business applications land on an Ethereum L2 such as Base or Arbitrum, because fees are cents rather than dollars and the tooling is mature. We model that cost before recommending anything.
Who pays the gas fees?
By default the user, which is a poor first experience for anyone new to this. We can sponsor fees with account abstraction so the application pays and the user simply clicks, or price them into the product. It is decided early, because it changes how the contract is written.
Do you get contracts audited?
We audit internally on every project: static analysis, fuzzing, invariant tests and a written threat model. Where real value sits in the contract we coordinate an external audit with a specialist firm, manage the fixes and put it back through review. We will not tell you an unaudited contract holding other people's money is fine.
What if we need to change a contract after launch?
Deployed code cannot be edited, so this is settled before launch rather than after. Depending on what you need that means an upgradeable proxy behind a timelock, a migration path to a new contract, or deliberately immutable code where being unchangeable is the entire point. Each has a cost and you will be shown which one you are buying.
Do our users need to understand crypto?
No, and the build should assume they do not. Email login with an embedded wallet, sponsored gas, transaction previews in plain language and recovery that does not hang on a seed phrase are all standard now. For most products the chain can stay an implementation detail your users never have to name.
