Tamper-proof
Every transaction is validated by the network and recorded on a distributed ledger, so state cannot be rewritten after the fact. Execution and data access stay limited to the participants the contract defines.
Web3
Smart contracts
A smart contract is code deployed on a blockchain that holds assets and enforces rules without an operator. When its conditions are met, it executes on its own: releasing funds, transferring tokens, updating state. Because every node verifies the same logic, outcomes are transparent and cannot be quietly altered.
How
Data and execution integrity, by design
Automated
Contracts execute the moment their trigger conditions are met on-chain. Settlement, escrow release, and payouts happen without manual checks or a middle office reconciling them.
Customizable
Contract logic is written to your exact business rules, so vesting schedules, fee splits, or access policies run as decentralized code inside your own system.
We build smart contracts
We design, write, and deploy custom smart contracts across a wide range of business requirements.
On Ethereum, Solana, Cosmos, and other platforms, we build contracts that enforce agreements in code. Removing intermediaries from settlement makes transactions faster, cheaper, and harder to dispute, and it puts the rules of your product where every party can verify them.
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Expertise
Solidity, Rust, EVM, Substrate, Cosmos SDK, CosmWasm, Solana, Foundry, Hardhat.
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dApps
DeFi, NFT, DePIN, DEX, vaults, staking.
Services
Our smart contract development services
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Development
Custom contract development on public, private, or hybrid chains. We write the contracts, integrate them with your backend and frontend, and hand over documented, tested code.
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Optimization
We profile and refactor existing contracts to cut gas costs and tighten execution paths, without changing the behavior your users depend on.
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Security audits
We audit contract code line by line: manual review backed by static analysis and fuzzing to surface reentrancy, access-control, and logic flaws before deployment. You get a written report and remediation guidance.
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Support
Post-launch monitoring, upgrades, and incident response, so your contracts stay safe as dependencies and standards evolve.
Methodology
Our development methodology
We run blockchain projects on short agile cycles: ship a working contract early, test it against real scenarios, and iterate. You see progress in weeks, not at the end of the engagement. Here is how a typical project runs.
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Connect
Book an NDA-protected consultation with a Webisoft smart contract engineer.
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Estimate
We scope the work and give you a concrete estimate of the timeline and cost for your project.
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Start
Once you approve the scope, we begin building your smart contract project.
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Iterations
We deliver in iterations, walking you through each prototype and folding your feedback into the next cycle.
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Deployment
After testing, audit checks, and sign-off on your requirements, we deploy the contracts to mainnet and launch.
Hiring models
Three ways to engage our blockchain team
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Dedicated team
A dedicated team of blockchain engineers assigned to your product, coordinated by a consultant who keeps delivery aligned with your goals.
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Team extension
Add senior blockchain engineers from our bench directly into your existing team, working on your process and tools.
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Project-based
We take the project end to end: architecture, development, audit, and launch, with a dedicated project manager as your single point of contact.
FAQ
Frequently asked questions
(6)- Smart contract projects are usually tracked through milestone-based delivery: a specification phase, contract development, testing, audit, and deployment, each with its own deliverable. A project manager or lead engineer reports progress against those milestones, and scope changes or feature additions are handled as explicit change requests. Because contracts are code, progress is also verifiable directly, through the repository, the test suite, and testnet deployments.
- Smart contracts run on a blockchain, a decentralized network where every node executes the same code and maintains the same ledger. Because that ledger is immutable, a deployed contract cannot be quietly modified, which makes execution tamper-resistant and auditable. They also execute automatically the moment their conditions are met, which removes third-party intervention from settlement and cuts both delay and counterparty risk.
- A smart contract is deployed to a blockchain as code that every node in the network stores. When a transaction calls the contract, every node runs the same function and must agree on the result before it is written to the ledger. Once the contract's predefined conditions are met, execution happens on its own, with no clearinghouse and no manual approval. That consensus-backed autonomy is what makes the outcome fast and reliable.
- The cost of smart contract development depends on a few main factors. The scope and complexity of the requirements set the engineering effort, from a simple token to a custom protocol. The target blockchain adds its own costs, including gas fees for deployment, storage, and execution. Developer rates then scale with contract complexity and with the depth of testing and auditing the project needs, and for high-value contracts the external audit can be a significant line item on its own.
- The main factors to weigh are the platform's native features and contract capabilities, its throughput and scalability under real load, and its security track record and network stability. Practical considerations matter just as much: the maturity of the tooling and developer experience, deployment and execution costs, and the size and responsiveness of the community. It also helps to consider the platform's roadmap and governance, where competitors and key integrations already live, and the existing expertise of the team that will build on it.
- Yes. Staff augmentation is a common way to add smart contract expertise: external blockchain developers integrate with an in-house team, follow its process, and provide specialized skills on demand for as long as they are needed. This suits teams that own the product roadmap but lack Solidity, Rust, or protocol design experience internally, and it avoids the long lead time of hiring scarce blockchain talent permanently.
Smart contract capabilities
Where we add value on smart contract work
A smart contract is code that handles money with no undo button, so the engineering standard is closer to avionics than to web development. These are the areas where our contract work goes deeper than getting the happy path to compile.
Multi-language, multi-VM
We write Solidity and Vyper for the EVM, Rust for Solana and CosmWasm, and Move for Aptos and Sui. Each VM has different failure modes: reentrancy and delegatecall pitfalls on the EVM, account and CPI constraints on Solana, resource semantics on Move chains. Working across them means we choose the platform for your product's needs rather than bending your product to the one stack we know.Security-first development
Security is built in during development, not bolted on at audit time. We follow checks-effects-interactions, minimize privileged roles, use OpenZeppelin and Solady audited primitives, and run Slither static analysis plus Foundry fuzzing and invariant tests in CI on every commit. The result is that external audits find fewer, cheaper issues, and the findings they do raise are about design trade-offs rather than known bug classes.Token and protocol standards
We implement ERC-20, ERC-721, ERC-1155, ERC-4626 vaults, and permit-based approvals, plus the newer account patterns around ERC-4337 smart accounts. Standards matter because wallets, indexers, and exchanges integrate against them: a token that deviates from expected behavior, such as fee-on-transfer or non-standard return values, breaks integrations in ways users discover before you do. When you need custom behavior, we isolate it and document the deviation explicitly.Upgradeability done carefully
We implement UUPS and transparent proxies, beacon patterns for contract fleets, and diamond architecture where genuinely warranted, along with the storage-layout discipline that keeps upgrades from corrupting state. Just as often we advise against upgradeability: an immutable contract with a well-designed parameter surface is easier to audit and easier for users to trust. When proxies are used, upgrade rights sit behind a multisig and a timelock, never a single key.Gas and cost engineering
Gas cost is user experience and, at protocol scale, real money. We profile with Foundry gas snapshots, pack storage slots, batch operations, choose calldata over storage where possible, and use patterns such as merkle claims instead of mass airdrops. On L2s the calculus changes because calldata dominates cost, so we optimize differently for Arbitrum, Optimism, and Base than for mainnet.Oracles and external data
Most exploited protocols were not broken through their own logic but through the price feed or bridge they trusted. We integrate Chainlink feeds, TWAP oracles, and redundancy checks with staleness and deviation bounds, and we design explicit fallback behavior for when a feed halts. Every external dependency gets a written trust assumption your team signs off on before launch.
How we work
How a smart contract engagement runs
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Specification and threat modeling
We turn your product intent into a written spec: state variables, actors, privileged functions, invariants that must always hold, and the economic assumptions attackers will test. This is also where we decide chain, standards, and whether contracts should be upgradeable. A spec of this shape typically takes one to three weeks and becomes the yardstick the code and the audit are both measured against. - 2
Development with tests as proof
We build in Foundry with unit tests, fuzz tests, and invariant suites growing alongside the contracts, plus fork tests against mainnet state for anything that touches live protocols. Coverage targets are agreed up front and every privileged path gets a negative test proving unauthorized callers fail. You review working code at the end of each milestone, deployed to a testnet you can interact with. - 3
Audit and hardening
We freeze the code, run our internal review and the static-analysis battery, then support the external audit: preparing documentation, answering auditor questions daily, and implementing fixes with regression tests for every finding. We help you select and book the audit firm early because reputable firms have real lead times, and we budget a re-review round because first passes almost always produce changes. - 4
Deployment and post-launch operations
Deployment is a scripted, rehearsed ceremony: deterministic deploy scripts, contract verification on block explorers, ownership transferred to your multisig, timelocks activated, and parameters set from a checklist with two-person review. Post-launch we set up monitoring on critical events and anomalous flows, define an incident-response runbook including pause procedures where they exist, and hand over everything your team needs to operate the protocol.
FAQ
Smart contract questions buyers ask us
(6)- The biggest drivers are novelty and consequence. Extending audited standards, such as a token with vesting or a staking contract, is weeks of work, while a novel DeFi mechanism with custom math, oracle dependencies, and upgradeable architecture takes months, and the external audit for it can cost as much as the development itself. Total value at risk matters too: a contract that will hold significant funds justifies fuzzing depth, invariant testing, and audit rounds that a low-stakes utility contract does not need. Reliable estimates therefore come with the specification, not before it.
- If the contract will hold or move meaningful value, yes. Internal testing and external review catch different things: a team's tests prove the invariants the team thought of, while an independent auditor hunts for the ones it did not. Budgets should be realistic, since reputable firms book weeks ahead, charge based on code size and complexity, and a fix-and-re-review cycle should be planned for. For lower-stakes contracts, a competitive audit platform or a focused review can be a proportionate alternative.
- It is a genuine trade-off, not a default. Upgradeability lets a team fix bugs and evolve the protocol, but it enlarges the attack surface, complicates audits, and asks users to trust whoever holds the upgrade key. Immutable contracts with tunable parameters earn more trust and are simpler to reason about. When upgradeability is justified, best practice is a multisig owner, a timelock so users can see changes coming, and storage-layout checks in CI so an upgrade cannot silently corrupt state. Many strong protocols launch upgradeable and renounce the capability once the design proves out.
- The decision should start from the target users and the product's unit economics. Ethereum mainnet offers the deepest liquidity and strongest security but the highest fees, so it suits high-value, low-frequency actions. L2s like Arbitrum, Optimism, and Base give EVM compatibility at a fraction of the cost and now host most new consumer-facing deployments. Solana fits high-frequency, low-fee products if the team accepts a different programming model, and Cosmos suits products that want their own app chain. Launching on one chain with code designed to port cleanly is usually wiser than going multi-chain from day one.
- Mature teams plan the response before launch rather than improvising after. Depending on the design, options include pausing affected functions through a guardian role, upgrading through a timelocked proxy, or migrating users to a fixed deployment. Best practice adds monitoring so anomalies surface in minutes, an incident runbook with named roles and decision thresholds, and a bug bounty on a platform such as Immunefi so researchers have a paid path to disclose instead of exploit. Immutable code plus a rehearsed response plan beats hoping nothing goes wrong.
- A project can start from whatever exists: a whitepaper, a spreadsheet of the mechanism, or just the business goal. The typical first step is a specification sprint of one to three weeks that produces the contract architecture, invariants, a chain recommendation, and a milestone-priced build plan, including a realistic audit budget and timeline. That specification is a standalone document the owner keeps and can shop around. From there, a typical path from spec to audited mainnet deployment runs two to five months depending on novelty and auditor availability.
