4x Engineer
SOLIDITY & EVM SPECIALISTS

Smart Contract Development Services

4x Engineer writes secure, gas-optimized Solidity smart contracts for Ethereum and every EVM-compatible network. We develop token contracts (ERC-20, BEP-20), NFT contracts (ERC-721, ERC-1155), staking, vesting, presale and governance contracts, test them thoroughly on a testnet, deploy them to mainnet and verify the source code on the block explorer, so your users can trust what they interact with.

Start Your Contract View Contract Types
  • Solidity
  • OpenZeppelin
  • Hardhat
  • Foundry

Specialities: ERC-20 · ERC-721 · Staking · Presale · Vesting · DAO

Why work with us

  • Secure by Design

    Access control and reentrancy guards

  • Gas-Optimized

    Lower fees for your users

  • Verified Source

    Readable on the block explorer

  • Fully Tested

    Unit and scenario tests before launch

Smart Contracts We Develop

Production-ready Solidity contracts for every common use case on EVM networks.

  • Token Contracts

    ERC-20 and BEP-20 tokens with exactly the supply rules your project needs.

    • Fixed or mintable supply
    • Buy/sell tax, burn & reflection options
    • Pause, blacklist & ownership controls

  • NFT Contracts

    ERC-721 and ERC-1155 contracts for collections, game items and memberships.

    • Allowlist & multi-phase minting
    • Royalties (ERC-2981) & on-chain metadata
    • Gas-efficient batch minting

  • Staking & Rewards

    Contracts that lock tokens or NFTs and pay rewards on a fair, transparent schedule.

    • Flexible & fixed-term staking
    • NFT staking
    • Reward pools with APR or fixed emission

  • Presale & Vesting

    Raise funds transparently and release tokens on a clear, on-chain schedule.

    • Multi-round presale / ICO contracts
    • Soft cap, hard cap & refunds
    • Cliff and linear vesting

  • DeFi Contracts

    Swaps, vaults and liquidity logic that integrate with existing DeFi protocols.

    • DEX router & liquidity integration
    • ERC-4626 vaults
    • Lending & yield strategies

  • DAO, Multisig & Upgrades

    Governance and admin contracts that keep control safe and shared.

    • On-chain voting & governance
    • Multisig wallets & timelocks
    • Upgradeable proxies (UUPS / Transparent)

Smart Contract Development Process

Every contract passes the same five stages before it reaches mainnet.

  1. 1. Specification

    We turn your rules into a precise written specification.

  2. 2. Development

    Clean Solidity code built on OpenZeppelin standards.

  3. 3. Testing

    Unit and scenario tests with Hardhat or Foundry, edge cases included.

  4. 4. Testnet

    A live testnet version you can try with real wallets.

  5. 5. Mainnet & Verification

    Deployed from your wallet, source verified on the block explorer.

Security Built Into Every Line

A smart contract cannot be edited once it is deployed, so we prevent problems before they happen.

  • Proven Standards

    OpenZeppelin libraries and well-known patterns instead of untested custom code.

  • Thorough Testing

    Unit, integration and edge-case tests run before every deployment.

  • Access Control

    Clear owner and role permissions with reentrancy protection.

  • Verified Source Code

    Contracts are verified on the block explorer so anyone can read them.

Supported EVM Networks

We build once and deploy on the chain that fits your users, fees and liquidity: Ethereum, its layer-2 networks and every EVM-compatible blockchain.

  • Ethereum Layer 1
  • Arbitrum One Layer 2
  • OP Mainnet (Optimism) Layer 2
  • Base Layer 2
  • zkSync Era Layer 2
  • Linea Layer 2
  • Scroll Layer 2
  • Mantle Layer 2
  • BNB Smart Chain EVM chain
  • opBNB Layer 2
  • Polygon PoS EVM chain
  • Avalanche C-Chain EVM chain
  • Gnosis Chain EVM chain
  • Cronos EVM chain
  • Sonic EVM chain

Not on the list? If the network runs the Ethereum Virtual Machine (EVM), we can build for it. Every project is deployed and tested on a testnet first, such as Sepolia or BNB Smart Chain Testnet.

Building a complete Web3 product?

Our blockchain development service adds the dApp, dashboards, integrations and launch around your contracts.

Blockchain Development

Smart Contract Development FAQ

What is a smart contract?

A smart contract is a program stored on a blockchain that runs exactly as written. It can hold funds, issue tokens or enforce rules without a middleman, and anyone can verify what it does.

Which language and tools do you use?

We write smart contracts in Solidity for the Ethereum Virtual Machine, using OpenZeppelin libraries and Hardhat or Foundry for testing and deployment.

Can a smart contract be changed after deployment?

A standard contract cannot be changed once it is deployed. When future changes are needed, we use an upgradeable proxy pattern (UUPS or Transparent) and explain the trade-offs before you decide.

Will my contract be verified on the block explorer?

Yes. We verify the source code on the network's block explorer, such as Etherscan or BscScan, so your users can read and trust it.

Can you review or fix an existing contract?

Yes. Share the contract address or source code and we will review it, point out risks and propose fixes or a safer new version.

Which networks can my contract run on?

Any EVM-compatible network, including Ethereum, BNB Smart Chain, Polygon, Arbitrum, Optimism, Base and Avalanche C-Chain. The same contract can be deployed on several networks.

Start Your Smart Contract

Describe your contract and we will reply with the next steps.

With country code, e.g. +91 98765 43210.

Features, token details, timeline and anything else we should know.

Fields marked * are required. We use these details only to reply about your project.

— OR —

Have Questions? Talk to a Solidity Expert

Contact us