Smart contract development
Solidity contracts built on audited libraries like OpenZeppelin, with clear roles, events and upgrade decisions made explicitly.
Web3 & blockchain
Smart contracts treated like the money they hold.
We design, test and ship Solidity contracts and the apps around them — with security thinking from the first line, and an honest view of when a blockchain is the wrong tool.
SolidityEVMFoundryHardhatNext.jsWallet integration
Overview
On-chain code cannot be patched quietly. Build it right.
Code deployed to a blockchain is public, handles value directly and cannot be quietly patched. That makes smart contract work closer to building payment infrastructure than building a website: the rules must be specified, the edge conditions tested, and the admin powers deliberately limited.
We build contracts on well-reviewed libraries, test them with unit and fuzz tests, and review them against the vulnerability classes that have cost real projects real money. Around them, we build interfaces that make transactions understandable to people who are new to wallets.
We are also honest about fit. Many ideas pitched as blockchain projects work better on an ordinary database, and we would rather tell you that at the start than build something you do not need.
Who it’s for
- Startups building a dApp, token or on-chain payment product
- Teams that need contracts reviewed before a launch
- Businesses exploring stablecoin or crypto payments
- Web2 products adding wallet sign-in or on-chain features
What we deliver
What you get
Testing and fuzzing
Unit, integration and fuzz tests with Foundry or Hardhat, covering the edge conditions attackers look for.
dApp front ends
Next.js interfaces with wallet connection, clear transaction states and human-readable confirmations.
On-chain payments
Split payments, escrow and subscription flows that release funds by rule, not by trust.
Security review
Threat modelling and a manual review against common vulnerability classes — reentrancy, access control, oracle and signature issues.
Deployment and operations
Testnet rehearsals, verified contracts, multisig ownership and monitoring after mainnet launch.
Signs you need this
This is for you if…
- You are about to deploy contracts that will hold user funds.
- Your contracts have never been tested beyond the happy path.
- You need a dApp front end that non-crypto users can understand.
- You want payments that release automatically when conditions are met.
- You are not sure whether your idea needs a blockchain at all.
- Admin keys for your contracts sit in one person’s wallet.
Tech stack
Tools we reach for
Contracts
SolidityOpenZeppelinEVM chainsUpgradeable proxies
Testing and analysis
FoundryHardhatSlitherFuzz testing
Front end
Next.jsTypeScriptwagmiviemWalletConnect
Operations
Safe multisigEtherscan verificationTestnetsOn-chain monitoring
How we work
From idea to a contract you can trust.
Fit check
Whether on-chain is justified, which chain suits the users and what must never go wrong.
Specify
Contract behaviour, roles, invariants and failure modes written down before code.
Build and test
Contracts and front end together, with tests and fuzzing on every rule that moves value.
Review
Internal security review and, for high-value contracts, preparation for an independent audit.
Launch
Testnet rehearsal, verified deployment, multisig ownership and post-launch monitoring.
Proof
Work we can point to
Solidity
PayCircle split payments
Share a link, everyone pays their share on-chain, and funds release automatically on the final payment — no backend to run. Built with Solidity and Next.js on the Sepolia testnet.
Ways to work
Pick the model that fits the work.
Fixed-scope packages
Clearly defined deliverables at a fixed price — ideal for websites, audits and well-understood builds.
See packagesCustom quote
For bespoke products and platforms: a short discovery, then a written proposal with milestones and a fixed or capped price.
Request a quoteMonthly retainer
Ongoing support, maintenance and improvement with a guaranteed response time and a set number of hours each month.
Discuss a retainerHourly / daily
Flexible time-and-materials help for troubleshooting, code reviews, consulting and team augmentation.
Book timeQuestions
Frequently asked questions
Can’t see your question? Ask us directly — you’ll get a straight, practical answer, even if it’s “you don’t need us for this”.
Do we actually need a blockchain?
Only if you need something a normal database cannot give you — such as rules that no single party controls, public verifiability or programmable digital assets. If a database would do, we will say so and save you the complexity.
Which chains do you work with?
Ethereum and EVM-compatible networks such as Base, Arbitrum, Polygon and BNB Chain. The choice depends on fees, users, liquidity and security needs.
Is your security review the same as an audit?
No. Our review is a careful internal check against known vulnerability classes and your own invariants. For contracts that will hold significant value, we recommend an independent audit as well and help you prepare for it.
Can contracts be changed after deployment?
Only if designed for it. Upgradeable proxies allow changes but add risk and trust assumptions; immutable contracts are simpler but final. We make that choice explicitly with you.
How do you protect admin keys?
Critical permissions go to a multisig wallet such as Safe, with several signers, rather than one person’s key. Sensitive changes can also be time-locked so users can see them coming.
Can non-crypto users use our dApp?
Yes, with good design: clear transaction steps, readable confirmations and, where appropriate, email or social sign-in wallets. We test the flow with people who have never used a wallet.
What about regulation in Nigeria?
Rules on digital assets are evolving, including requirements from the Securities and Exchange Commission Nigeria. We build the technology; you should take specialist regulatory advice for your product and markets.
Have something in mind? Let’s scope it.
Tell us what you’re building, or what’s broken. We’ll come back with questions, a suggested approach and the simplest sensible next step — no obligation.