SoluLab builds, tests, and audits smart contracts for businesses that need automated agreements to run correctly the first time. We work in Solidity, Rust, and Vyper across Ethereum, Polygon, Solana, and Base, covering everything from a single escrow contract to the full contract suite behind a DeFi protocol or tokenization platform.
Smart contracts don't get patched quietly after launch. A bug in production code can lock funds or get exploited within minutes of deployment, which is why the difference between development shops shows up less in the demo and more in what happens six months after go-live. Our smart contract development services are built around that reality: named engineers, a documented audit trail, and a process a CTO can actually inspect before signing off.
// SPDX-License-Identifier: MITpragma solidity ^0.8.24;
import "@openzeppelin/.../ReentrancyGuard.sol";
contract Escrow is ReentrancyGuard {
function release(uint256 id)
external nonReentrant onlyArbiter {
_settle(id);
}
}We scope engagements around the business logic first, then choose the chain and standards that fit it, rather than pushing every client toward the same stack.
Escrow, vesting, royalty splits, multi-signature approvals, and DAO governance coded to your exact business logic.
ERC-20 (fungible tokens), ERC-721 and ERC-1155 (NFTs and semi-fungible assets), and ERC-3643 for permissioned, compliance-aware security tokens.
lending/borrowing pools, staking and yield mechanisms, DEX and AMM logic, and price-feed integrations via Chainlink oracles.
fractional ownership structures for real-world assets (real estate, invoices, revenue shares) with cap-table logic and transfer restrictions baked in.
static analysis, manual review, and fix-and-retest cycles for contracts built in-house or by a previous vendor.
The same contract logic ported and adapted across Ethereum, Polygon, Solana, and Base where a project needs to live on more than one network.
Every smart contract engagement follows the same six-stage path from requirements to a monitored mainnet deployment: design the logic, write and test the code, audit it, stage it, then ship and watch it. Skipping a stage is the most common reason contracts fail after launch, so we don't compress this for speed.
Ethereum, Polygon, Base
Solana
Vyper (where a simpler, more auditable syntax is preferred over Solidity).
Build, test, and deploy pipelines with rich plugin coverage.
Fast Solidity-native testing and fuzzing.
Truffle for build/test/deploy pipelines.
OpenZeppelin's audited contract libraries as a base wherever possible instead of custom-writing standard logic from scratch.
Automated static analysis on every commit to the contract branch.
Symbolic execution to surface reachable vulnerable states.
Line-by-line review by an engineer who didn't write the contract.
A named external partner on higher-value contracts. [Partner TBC]
Oracles and price feeds, including liquidation triggers.
Off-chain metadata storage for tokens and documents.
Custody integration where contracts touch institutional treasury flows.
Fungible tokens — currencies, utility and reward tokens.
Unique and hybrid assets, common across gaming and collectibles.
Permissioned, compliance-aware security tokens.
Fee handling and gas optimisation on EVM deployments.
we map the business logic, actors, and edge cases before a line of code is written. This is where most scope disputes later in a project actually get prevented.
we recommend a chain and token standard based on your throughput, cost, and compliance needs, not on which chain we happen to prefer.
contracts are written against OpenZeppelin's audited base libraries where applicable, with inline documentation for the auditor and your internal team.
unit tests, fuzz testing, and mainnet-fork simulations to catch logic errors before they're expensive
Automated scanning plus manual review; issues get fixed and retested, not just flagged.
Testnet staging, client sign-off, mainnet deployment, and post-launch monitoring for anomalous transactions.
SoluLab has shipped blockchain projects across DeFi, asset tokenization, NFT platforms, and enterprise chains, with smart contracts as the common thread running through nearly all of them.
Our blockchain and smart contract experts engineered a Solana-powered NFT wallet platform built on modular, upgradeable smart contracts. The solution enables complete wallet ownership transfers, where a single NFT trade passes on the wallet, its token balances, and everything accumulated inside it, alongside automated on-chain auctions with sub-400ms finality and real-time performance.
Read the full case study →Our blockchain and smart contract experts built a multi-chain decentralized exchange using ERC-4337 account abstraction, enabling gasless trading, cross-chain liquidity aggregation, and one-click swaps across Ethereum, Polygon, Arbitrum, Optimism, and Base, no native gas tokens or seed phrases required.
Read the full case study →"An audit isn't a certificate you frame once. Every time you change a parameter, add an integration, or upgrade behind a proxy, you've changed the threat model. We treat audits as something you repeat, not something you pass."
"SoluLab's smart contract team gave us a modular architecture from day one, separate, upgradeable modules for wallets, auctions, and token logic. That decision paid off when we needed to add new auction formats post-launch without touching the core contracts. Their Solana and Rust expertise made the sub-400ms finality and near-zero transaction costs possible."
"The smart contract work was the hardest part of this build, ERC-4337 account abstraction, gasless transactions, cross-chain routing, all of it had to be airtight. SoluLab's contract engineers delivered a system that cut our failed trades by 85% and made onboarding painless for users who'd never held a native gas token before."
Lending protocols, DEXs, yield vaults, stablecoin issuance and treasury contracts.
Fractional ownership and revenue-sharing contracts for tokenized real-world assets.
NFT minting, marketplace, and royalty contracts for in-game assets.
Custody-integrated contracts, ERC-3643 compliance-aware standards, audit-heavy deployments.
Smart contract development is writing self-executing code that automatically carries out an agreement's terms when predefined conditions are met, without a middleman. It runs on a blockchain like Ethereum, Solana, or Polygon, so once deployed, the logic executes exactly as written and the transaction history is publicly verifiable.
Cost depends on contract complexity, the number of contracts, the chain, and audit scope. A single-purpose contract (e.g., a token vesting schedule) costs far less than a multi-contract DeFi protocol with oracle integrations.
Most engagements run 6-14 weeks from discovery to mainnet launch, with simple single-purpose contracts at the shorter end and multi-contract protocols requiring deeper audits at the longer end. Rushing the audit stage to hit a deadline is the most common cause of post-launch incidents.
Ethereum offers the deepest security track record and liquidity, which suits high-value DeFi and institutional use cases. Solana offers much lower transaction costs and higher throughput, which suits high-frequency applications like gaming or trading. Polygon and Base offer Ethereum compatibility at a lower cost, often the right fit for consumer-facing apps. We recommend a chain based on your throughput and compliance needs during discovery, not by default.
No. Solidity is the dominant language on Ethereum, Polygon, and Base, but Solana contracts are typically written in Rust, and Vyper is sometimes preferred over Solidity for contracts where a simpler, more restrictive syntax reduces the chance of certain bug classes.
Yes, for any contract handling real value. An audit combines automated static analysis (tools like Slither and Mythril) with manual review by someone who isn't the contract's author, since fresh eyes catch logic errors the original developer tends to miss. Skipping this step is the leading cause of exploited contracts.
Only if it was designed with an upgrade pattern (like a proxy contract) from the start. A standard, non-upgradeable contract is immutable once deployed, which is a security feature but means bugs can't simply be patched. This trade-off between immutability and upgradeability gets decided during the architecture stage, not after deployment.
ERC-20 is the standard for fungible tokens, where each unit is identical (like a currency). ERC-721 is the standard for non-fungible tokens, where each token is unique (like a piece of art or a deed). ERC-1155 is a hybrid standard that lets a single contract manage both fungible and non-fungible tokens, which is common in gaming for handling currencies and unique items together.
For a non-upgradeable contract, the options are limited: pause functions (if built in), a migration to a new contract, or in the worst case, funds may be at risk until manually recovered. This is exactly why the testing and audit stages matter more in smart contract development than in typical software, where a hotfix is usually available.
Yes, we sign NDAs before discovery begins. Clients own the resulting contract code and intellectual property once the engagement is delivered and paid for.
We offer post-launch monitoring for anomalous transaction patterns, plus maintenance retainers for contract updates, new feature additions, or migrations to upgraded standards.
Bring the business logic. We'll come back with a chain recommendation, a token standard, an audit plan, and a fixed-scope estimate — no obligation to build with us.
NDA signed before discovery. You own the code.
NDA signed before discovery. You own the code.