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Crypto and Web3 onlySecurity review included

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EVM chains development

EVM blockchain development on Ethereum, Arbitrum, Base and BSC

We build Solidity contracts, token and staking systems, wallets and dApps for EVM chains. One codebase can usually target several networks, with the differences between them planned up front.

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  • Solidity contracts and tests
  • Ethereum, Arbitrum, Base and BSC
  • One codebase, several networks

What we build on EVM chains

EVM chains share one virtual machine, so Solidity code and tooling carry across Ethereum, Arbitrum, Base, BSC and many other networks. We build:

  • ERC-20, ERC-721 and ERC-1155 token contracts with the rules you need.
  • Staking, vesting and reward contracts.
  • Swap and liquidity contracts and routers.
  • dApp front ends with wallet sign-in and transaction flows.
  • Indexing and backend services for history and analytics.

For the contract layer alone, see smart contract development. For wallets, see wallet development.

Choosing between Ethereum, Arbitrum, Base and BSC

The chains differ in fees, finality, user base and tooling, even though the code looks the same. Ethereum mainnet gives the broadest reach with the highest fees. Arbitrum and Base are layer 2 networks with lower fees that settle back to Ethereum. BSC has its own validator set and its own ecosystem.

We help you pick one chain to launch on or a rollout order for several. We plan for the real differences, such as gas costs, block times, bridge behavior and available infrastructure, rather than assuming a deployment will behave identically everywhere.

How we build and test

Contracts are written in Solidity with Foundry or Hardhat tests, including tests for failure cases and unusual call orders. We use well-known audited libraries where they fit instead of rewriting standard logic, and we keep contracts small and readable so a reviewer can follow them.

Upgradeability is a decision, not a default. We explain the proxy options, who would hold the admin keys and what users must trust, then build what you choose. Deployment scripts and verified source on the block explorer are part of the handover.

A wallet or dApp MVP typically runs $8,500 to $16,000 and 3 to 4 weeks. A turnkey DEX or AMM with factory, router, staking and liquidity contracts and an interface typically runs $14,000 to $28,000 and 4 to 6 weeks. Ranges are typical, depend on scope, chains and integrations, and a written quote follows a scoping conversation. See pricing and packages. You own the code and the accounts you pay for.

Limits you should know about

Deployed contracts are public and, unless built to be upgradeable, cannot be changed, so a bug can mean lost funds. A security review lowers risk but cannot remove it; see audit and security review. We build software only. We do not hold client funds, operate your service or give legal advice, and licensing, KYC and AML, sanctions and securities law, including MiCA in the EU, are your responsibility.

Crypto and Web3 only Security review included Fixed-scope quotes Client owns the code

How it works

  1. Tell us what you want to build

    A wallet, exchange, contract, bot or payment flow, and the chains involved.

  2. We scope and quote

    You get an architecture outline, a timeline and a written price range.

  3. We build in milestones

    Working builds are shared at each milestone, with a security review before launch.

Questions about crypto software agency in United States

Can one contract codebase run on several EVM chains?
Usually yes, with configuration per network. We parameterize addresses, fees and chain-specific behavior, then test on each target chain's test network before mainnet. Some features, such as bridges or native oracles, differ by chain and need their own work, which we call out in the quote.
Do you build upgradeable contracts?
Only if you want them. Upgradeable proxies add flexibility and also add trust, because whoever holds the admin key can change the logic. We explain both paths, suggest a multisig for any admin role, and document who can do what after launch.
Which tools and libraries do you use?
Solidity, Foundry or Hardhat for tests and deployment, OpenZeppelin contracts for standard token and access logic, and ethers or viem on the front end. We choose tools to match your team so that you can maintain the code once it is handed over.
Can you work with an existing deployed contract?
Yes. We can integrate with contracts you already run, read their state, and build new contracts or interfaces around them. We start with a review of the deployed code and its source so the quote covers the real work, and we flag risks we find along the way.
Do you handle token launches and listings?
We build the contracts and interfaces. Tokenomics, legal classification, marketing, exchange listings and compliance are your decisions and your responsibility. We can describe in plain terms what each technical design choice means for users and for the supply, so that the decisions you make are informed ones.

Ready to scope your crypto build? Message us on WhatsApp or Telegram with what you want to build and the chains involved. Chat on WhatsApp Chat on Telegram

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