# Web3 and blockchain development, audited before launch

> Smart contracts, dApps, DeFi, NFT marketplaces, DAOs and private blockchains, built on Ethereum, Solana, Polygon and more, with security audits.

URL: https://webvijayi.com/services/web3-blockchain/

## The short answer

We design and build Web3 and blockchain products, from smart contracts and decentralised apps to DeFi platforms, NFT marketplaces, DAOs and private blockchains for business use. Every contract we write is tested, optimised for low fees and independently audited before it goes live.

## How it works

1. **We plan the architecture.** We confirm the use case, choose the right network, design the token model and draw up the technical plan. This usually takes two to three weeks.
2. **We write the smart contracts.** We write each contract, unit test it and optimise it for gas. This usually takes four to six weeks.
3. **We audit and test.** The contracts go through third-party security audits, penetration testing, formal verification and a test network launch. That usually takes two to three weeks.
4. **We launch on mainnet.** We deploy to production, seed liquidity where needed, support the launch and then maintain it with upgrade paths. Launch usually takes one to two weeks, and the maintenance carries on after that.

## What we build

- **Smart contracts.** Secure, audited contracts on Ethereum, Polygon, Solana and other major chains.
- **DeFi platforms.** Exchanges, lending protocols, staking and liquidity pools, with token economics that hold up.
- **NFT marketplaces and collections.** Marketplaces, generative collections and creator platforms with royalties and cross-chain support.
- **Decentralised apps.** Full-stack dApps with a web frontend, smart contracts behind it and wallet sign-in.
- **Enterprise blockchain.** Private networks for supply chain tracking, document verification and asset tokenisation.
- **DAOs.** We build governance, voting, treasury management and community decision-making.

## What you get

- Architecture and strategy, covering the use case check, network choice and token design
- Smart contracts in Solidity, Rust or Move, fully tested and gas optimised
- Token economics, with distribution, vesting and governance models
- A dApp frontend in React with Web3.js or Ethers.js
- Wallet integration with MetaMask, WalletConnect and Coinbase Wallet
- Decentralised storage on IPFS or Arweave
- Indexing with The Graph for fast queries and analytics
- Gas optimisation that keeps fees low for your users

## In numbers

- **500+** projects completed
- **98%** client success rate
- **24/7** expert support

## The market

- **$99.75B** Market size by 2034
- **41.18%** CAGR growth rate
- **$50B+** DeFi total value locked
- **$500M** Monthly NFT volume

## Success story

**NFT marketplace**

*Generates $2.4M in first 90 days*

We built a generative NFT collection with custom minting mechanics, a rarity system and marketplace integration. All 8,000 NFTs sold out in 48 hours, and primary plus secondary sales reached $2.4M within 90 days.

- **$2.4M** Revenue in 90 days
- **8,000** NFTs sold (sold out)
- **48 hours** Time to sell out
- **Zero** Security incidents

## Tools we work with

Ethereum and Solidity, Solana and Rust, BNB Chain and Avalanche, Polygon, Arbitrum and Optimism as layer 2 networks, Hyperledger Fabric for private networks, Hardhat and Foundry for development, Web3.js and Ethers.js, The Graph, IPFS and Arweave, and Chainlink oracles.

## Where it fits

Blockchain fits when ownership, transparency or a shared record between parties is the point of the product, as with digital assets, marketplaces, supply chain proofs or community governance. For the website or app around it, see [websites](https://webvijayi.com/services/websites/) and [mobile apps](https://webvijayi.com/services/mobile-apps/). For the security of the wider business, see [cybersecurity as a service](https://webvijayi.com/services/cybersecurity/).

## Price

We quote every project in writing after a free consultation, and we agree the timeline in the same quote. Audit and network fees are listed separately. You'll find full details on the [pricing page](https://webvijayi.com/pricing/).

## Next step

Tell us what you want to build on-chain, and before anything else we'll check whether blockchain is the right fit.

[Book a free consultation](https://webvijayi.com/contact/#book) · [Get your free AI plan](https://webvijayi.com/free-ai-plan/)

## Frequently asked questions

### Do we actually need a blockchain?

Often you don't, and we'll tell you. A blockchain helps when several parties who don't fully trust each other need a shared record, or when users should own their assets directly. If a normal database does the job, it's cheaper and simpler.

### Which blockchain should we build on?

It depends on fees, speed, the tools your users already have and where similar projects live. Ethereum and its layer 2 networks, like Polygon, Arbitrum and Optimism, are common choices. Solana suits high-volume apps, and Hyperledger Fabric suits private enterprise networks.

### How do you keep smart contracts secure?

We write thorough tests, run formal verification where it matters and deploy to a test network first. Before mainnet launch we arrange an independent third-party audit. Contracts can also include upgrade paths for fixes.

### What are gas fees, and can you lower them?

Gas is the fee users pay to run a transaction on the network. Efficient contract code and the right network can cut those fees a lot, so we optimise for it from the start.

### How much does a blockchain project cost?

We quote every project in writing after a free consultation, because the price depends on the contracts, the app around them and the audits they need. Third-party audit fees and network fees are listed separately.