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Smart Contract Development for Web3 Innovation

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We design, develop, and audit secure smart contracts on Ethereum, BNB Chain, Polygon, and Layer 2 networks from token logic to DeFi automation.

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What We Do ?

What We Deliver as a Smart Contract Development

We help startups, protocols, and enterprises design, develop, and deploy smart contracts that power tokens, DeFi ecosystems, dApps, and Web3 automation across multiple EVM-compatible chains.

ERC-20, ERC-721, ERC-1155 Token Contracts

We build and customize token contracts for fungible tokens, NFTs, and multi-token standards, including minting logic, royalties, and burn mechanics.

DeFi Protocol Contracts

Custom contracts for staking, yield farming, lending/borrowing, AMMs, liquidity pools, vesting, and on-chain rewards.

NFT & Marketplace Contracts

Create smart contracts for NFT minting, auctions, lazy minting, and full-featured NFT marketplace logic with custom royalty handling.

DAO Smart Contracts & Governance Tools

Deploy token-based voting contracts, multi-sig wallets, treasury automation, proposal execution logic, and DAO frameworks like Governor Bravo.

Escrow, Subscriptions & Payment Flows

Build automated payments, streaming contracts, milestone-based escrow, and subscription management logic with tokenized billing.

Audit-Ready Smart Contract Development

Clean, testable, and modular code with best practices in gas optimization, security patterns, and third-party audit readiness.

Web3 Integration & dApp Backend Logic

Web3-compatible contracts that work seamlessly with your frontend via Ethers.js or Web3.js, supporting event triggers, API layers, and real-time UX.

Cross-Chain Deployment & Upgradeability

Deploy contracts on Ethereum, BNB, Polygon, Arbitrum, or Optimism with proxy upgrade support and multi-network logic.

Industry Adoption

Why Smart Contracts Are the Core of Every Web3 Innovation

Smart contract power automation, enforce trust, and eliminate intermediaries, enabling secure, transparent, and decentralized interactions across every industry.

At Rain Infotech, we specialize in smart contract development. We help startups, enterprises, and Web3 innovators launch secure, scalable, and audit-ready smart contracts that power DeFi platforms, NFT ecosystems, DAOs, and dApps, enabling trustless automation and blockchain-powered efficiency.

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$100+ Billion in Value Locked via Smart Contracts

Smart contracts are the foundation of DeFi, NFTs, DAOs, and on-chain automation, securing massive value on Ethereum and beyond.

Over 1.7 Million Smart Contracts Deployed on Ethereum

Developers rely on smart contracts to power decentralized apps, financial instruments, and digital assets.

90% of Web3 Projects Start With Smart Contract Logic

From tokens to treasury automation, smart contracts are the first code deployed in any decentralized project.

Self-Executing Code Reduces Transaction Risk by 80%

Smart contracts eliminate the need for manual processing and enforce compliance through code.

Cross-Industry Adoption: Finance, Supply Chain, Real Estate, Gaming

Industries use smart contracts for real-time settlements, automated royalty distribution, identity verification, and tokenized asset ownership.

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Innovation Stack

Our Smart Contracts Development Capabilities

From token creation to DeFi automation, DAO governance, and Gaming Smart Contracts, we build audit-ready smart contracts with high performance, modular design, and multichain compatibility.

Solidity & Vyper Expertise

We develop secure and efficient contracts using Solidity and Vyper, tailored for EVM-compatible chains and complex protocol logic.

Modular & Upgradeable Contract Architecture

Smart contracts are written with upgradeable proxy patterns (OpenZeppelin, UUPS, Transparent Proxy) for long-term scalability.

Gas Optimization Techniques

Contracts are optimized for low gas usage with event minimization, storage packing, and tight loop logic, without compromising readability.

Chainlink & Oracle Integrations

We integrate Chainlink, Band Protocol, or custom oracles to enable external data usage in your smart contracts like price feeds or off-chain triggers.

Cross-Chain & L2 Deployment

Deploy contracts on Ethereum, BNB, Polygon, Arbitrum, Optimism, Base, or custom EVM forks with bridging, messaging, and liquidity sync.

Role-Based Access & Governance Logic

Use multi-role contracts with admin/owner/operator permissions, DAO token voting, and pause/emergency functions.

Testing Suite & CI/CD Pipeline Setup

We provide complete testing (unit, integration, coverage) with frameworks like Hardhat, Foundry, or Truffle, plus GitHub CI workflows.

Audit Support & Documentation

Audit-ready structure, inline comments, Natspec annotations, and professional documentation compatible with top audit firms.

How It Works

Our Well-Organized Approach to Smart Contract Development

From concept to deployment, we follow a battle-tested process to deliver secure, scalable, and production-ready smart contracts, tailored to your business logic and chain of choice.

  • 01

    Requirements Gathering & Logic Mapping

    We start by understanding your use case — tokens, DeFi, governance, NFTs, escrow, and define core functions, user roles, and edge conditions.

  • 02

    Architecture & Standards Selection

    We choose the best standards (ERC-20, ERC-721, OpenZeppelin, custom modules) and define the contract architecture, proxy pattern (if needed), and oracle integration logic.

  • 03

    Smart Contract Development & Internal Testing

    We develop clean, modular Custom Smart Contracts in Solidity or Vyper, including all core logic, role-based access control, emitting events, and upgradeability patterns.

  • 04

    Unit Tests, Gas Profiling & Edge-Case Simulation

    Using Hardhat or Foundry, we run full test coverage, simulate economic edge cases, optimize gas, and prepare contracts for audit review.

  • 05

    Frontend or Web3 Integration

    We help integrate contracts into your dApp using Web3.js or Ethers.js, ensuring seamless communication with the frontend, backend, and wallet providers.

  • 06

    Deployment, Audit Support & Maintenance

    We deploy to testnet, then mainnet assist with third-party audit handoffs, provide audit-response code refactoring, and support future upgrades post-launch.

What We’ve Built

Success Stories That Speak for Themselves

Discover how we help visionary startups and enterprises bring Blockchain and AI-powered platforms to life, solve complex challenges across finance, retail, logistics, and more.

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Sectors

Redefining Industries with Blockchain Companies

Custom-built digital solutions tailored to the unique demands of every industry. We help businesses overcome complex challenges with blockchain development companies.

 

Healthcare

Enhance diagnostics through AI-powered analysis, automate patient engagement with intelligent assistants.

AI Blockchain

Finance

Streamline operations with AI-driven fraud detection, predictive analytics, and algorithmic decision-making.

AI Blockchain

Retail

Streamline operations with AI-driven fraud detection, predictive analytics, and algorithmic decision-making.

AI Blockchain

Insurance

Streamline operations with AI-driven fraud detection, predictive analytics, and algorithmic decision-making.

AI Blockchain

Supply Chain

Track goods from origin to destination with transparent, tamper-proof blockchain records.

Blockchain

Government

Build trust and transparency in public systems with blockchain-led recordkeeping, identity verification.

Blockchain

Energy

Enable peer-to-peer energy trading, track carbon credits, and support sustainable energy initiatives using decentralized.

Blockchain
Tech Stack

Our Smart Contract Development​ ​ Tech Stack

We use battle-tested tools and blockchain frameworks to deliver secure, scalable, and future-ready decentralized solutions.

Blockchain Infrastructure

Robust backend infrastructure that guarantees your blockchain app operates seamlessly. From node providers and indexing tools to wallet integrations and decentralized storage, we cover all the necessities.

Service Included:

IPFS
The Graph
Infura
Alchemy
QuickNode
Chainstack
MetaMask
Trust Wallet
Keplr
Safe (Gnosis)
SubQuery
WalletConnect
RainbowKit

Blockchain Ecosystem

Improve your product experience with seamless cross-chain capabilities, DEX frameworks, and blockchain explorers. We integrate leading tools such as LayerZero, Uniswap SDK, Blockscout, and custom-built bridges to enhance every interaction.

Service Included:

LayerZero
Uniswap
PancakeSwap
Iquidus Explorer
Bulwark Explorer
Blockscout Explorer
Beacon Explorer
1inch
Pinksale.finance
Pump.fun
MoonPay

Blockchain Platforms

Build on the most trusted and scalable blockchains in the industry. We support a wide range of networks, from Ethereum and BNB Chain to emerging Layer 1s like Sui and Aptos, tailored to your project’s needs.

Service Included:

Hyperledger Besu
Avalanche
Solana
Ethereum
BNB Chain
Polygon
Arbitrum
Optimism
Near
Sui
Aptos
Tendermint
Cosmos SDK
Substrate

Blockchain Tools

Discover essential tools like Remix, MetaMask, Hardhat, and Etherscan that streamline blockchain development, testing, and deployment. From smart contract debugging to transaction tracking, we utilize the best tools to ensure efficiency, security, and seamless dApp performance.

Service Included:

Solidity
Ethers.js
Web3.js
Truffle
Foundry
Hardhat
Remix
Ganache
Brownie
Vyper
Rust
Move
Cairo
OpenZeppelin
Why Rain Infotech?

Why Leading Brands Choose Rain Infotech

Trusted by global clients and partners for delivering secure, scalable, and future-ready Blockchain and AI solutions with reliability, speed, and deep domain knowledge.

10+ Years of Excellence

Founded in 2015, we’ve grown into a globally trusted agency delivering high-impact digital solutions.

Blockchain & AI Under One Roof

Dual expertise in Web3 and GenAI – from smart contracts to custom LLMs and AI copilots.

Custom & White-Label Solutions

Whether you need a fast MVP or a fully branded platform, we’ve built it all.

Startup Agility + Enterprise Maturity

We adapt fast like startups, and deliver reliably like enterprise teams.

Security-First Development

From DeFi platforms to AI agents, security is baked into our architecture and code.

Transparent Communication

You’re never left guessing – we collaborate openly from start to scale.

Blogs

Resources & Insights

Explore expert blogs, technical guides, and curated insights to help you build smarter with AI and blockchain development .

 

RWA Tokenization vs Traditional Asset Management: Key Differences
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The Path to Medical Superintelligence: How AI Is Revolutionizing Healthcare

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AI agents are now an integral component of automation across all industries. They’re studying data, making choices, and interfacing with…

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Bitcoin Layer-2 Network Botanix Launches Mainnet, Emphasizes Decentralization From the Beginning

In the rapidly growing world of decentralized finance (DeFi) and blockchain technology, a new player has entered the arena: Botanix.…

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Testimonial

What Our Clients Say

Trusted by global clients and partners for delivering secure, scalable, and future-ready Blockchain and AI solutions with reliability, speed, and deep domain knowledge.

300+
Coin-Token development
100+
Web3 Mobile-Web Apps Delivered
50+
dApps Built on EVM Chains
30+
Decentralised Web & Mobile Wallet

Just genius. Just pure genius. Fun to work with. On time. Not only was he very accessible but he delivered more than what was committed, I got my work well before time for which I was really satisfied.

Hanson Nguyen
Orlando, United States
Johannes testimonial video
Johannes, Dubai

Their blockchain expertise is unparalleled. They helped us launch our token and build a secure, scalable dApp. The communication throughout the project was excellent.

Mike Rotch
Web3 Innovator
Rainer testimonial video
Rainer, Estonia

Amazing team! They understood our vision perfectly and delivered a cutting-edge AI solution that exceeded our expectations. Highly recommend for complex projects.

Sarah Chen
Tech Startup CEO
Orhan testimonial video
Orhan, Germany

Just genius. Just pure genius. Fun to work with. On time. Not only was he very accessible but he delivered more than what was committed, I got my work well before time for which I was really satisfied.

Hanson Nguyen
Orlando, United States
Mughira testimonial video
Mughira, USA

Their blockchain expertise is unparalleled. They helped us launch our token and build a secure, scalable dApp. The communication throughout the project was excellent.

Mike Rotch
Web3 Innovator
Tine testimonial video
Tine, Philippians

Amazing team! They understood our vision perfectly and delivered a cutting-edge AI solution that exceeded our expectations. Highly recommend for complex projects.

Sarah Chen
Tech Startup CEO
Bright Enabulele testimonial video
Bright Enabulele, USA

Just genius. Just pure genius. Fun to work with. On time. Not only was he very accessible but he delivered more than what was committed, I got my work well before time for which I was really satisfied.

Hanson Nguyen
Orlando, United States
Louis Kelly testimonial video
Louis Kelly, UK

Their blockchain expertise is unparalleled. They helped us launch our token and build a secure, scalable dApp. The communication throughout the project was excellent.

Mike Rotch
Web3 Innovator

Just genius. Just pure genius. Fun to work with. On time. Not only was he very accessible but he delivered more than what was committed, I got my work well before time for which I was really satisfied.

Hanson Nguyen
Orlando, United States
Johannes testimonial video
Johannes, Dubai

Their blockchain expertise is unparalleled. They helped us launch our token and build a secure, scalable dApp. The communication throughout the project was excellent.

Mike Rotch
Web3 Innovator
Rainer testimonial video
Rainer, Estonia

Amazing team! They understood our vision perfectly and delivered a cutting-edge AI solution that exceeded our expectations. Highly recommend for complex projects.

Sarah Chen
Tech Startup CEO
Orhan testimonial video
Orhan, Germany

Just genius. Just pure genius. Fun to work with. On time. Not only was he very accessible but he delivered more than what was committed, I got my work well before time for which I was really satisfied.

Hanson Nguyen
Orlando, United States
Mughira testimonial video
Mughira, USA

Their blockchain expertise is unparalleled. They helped us launch our token and build a secure, scalable dApp. The communication throughout the project was excellent.

Mike Rotch
Web3 Innovator
Tine testimonial video
Tine, Philippians

Amazing team! They understood our vision perfectly and delivered a cutting-edge AI solution that exceeded our expectations. Highly recommend for complex projects.

Sarah Chen
Tech Startup CEO
Bright Enabulele testimonial video
Bright Enabulele, USA

Just genius. Just pure genius. Fun to work with. On time. Not only was he very accessible but he delivered more than what was committed, I got my work well before time for which I was really satisfied.

Hanson Nguyen
Orlando, United States
Louis Kelly testimonial video
Louis Kelly, UK

Their blockchain expertise is unparalleled. They helped us launch our token and build a secure, scalable dApp. The communication throughout the project was excellent.

Mike Rotch
Web3 Innovator
FAQs

FAQs About Smart Contract Development

A smart contract is a self-executing program deployed on a blockchain. It runs predetermined logic, like token transfers, staking, or voting, without intermediaries, based on user actions or external data inputs. It forms the backbone of smart contract development services across DeFi, NFTs, and Web3 ecosystems.

As a smart contract development company, we build token contracts (ERC-20, ERC-721, ERC-1155), DeFi protocols, DAO voting systems, NFT marketplaces, escrow and payment flows, staking farms, and more, all EVM-compatible.

Our smart contract development services support Ethereum, Polygon, BNB Chain, Arbitrum, Optimism, Avalanche, Base, and any EVM-compatible network, including private forks and testnets.

Yes. As part of our advanced smart contract development offerings, we implement proxy patterns like UUPS or Transparent Proxy to allow future upgrades while preserving contract state.

While we don’t conduct formal audits in-house, we ensure all smart contracts are audit-ready. We assist with audit submission, refactoring, and implementing feedback from top auditing firms like CertiK, Hacken, or Trail of Bits, a key value of working with a reliable smart contract development company.

We utilize Solidity, Vyper, Hardhat, Foundry, OpenZeppelin, Ethers.js, and Truffle, depending on the scope of your smart contract development needs and ecosystem compatibility.

Yes. We offer end-to-end smart contract development services, including optional Web3 integration with React.js, Next.js, or your preferred stack ensuring wallet compatibility and smooth frontend interaction.

Simple token contracts can be deployed in 2–3 days. Complex smart contract development projects such as DeFi platforms, staking systems, or DAO governance typically take 2–6 weeks based on testing, complexity, and audit requirements.

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