Full stack dApp development company - Web3, DeFi & NFT

We build full stack decentralized applications, from Solidity smart contracts to React frontends and Web3 wallet integration. Our dApp development services cover DeFi protocols, NFT platforms, DAO governance, and RWA tokenization, deployed across Ethereum, Base, Arbitrum, Polygon, and any EVM-compatible chain. Senior engineers, AI-accelerated delivery, lifetime bug-fix guarantee.

Why teams choose Vasilkoff for dApp development

• Senior Solidity and Web3 engineers with production delivery ownership
• Lifetime free bug fixing for code we deliver
• Security-first process with automated and manual review
• Multi-chain architecture support across the active EVM ecosystem
• AI-accelerated development without reducing engineering rigor

What we build

DeFi protocols

Lending and borrowing applications, DEX components, yield strategies, staking contracts, collateral logic, and treasury flows. We implement battle-tested patterns inspired by Uniswap V3 and Aave V3 architectures where appropriate, then adapt them to your product requirements.

NFT platforms

ERC-721 and ERC-1155 minting systems, marketplace contracts, royalty logic (ERC-2981), metadata strategies, allowlists, lazy minting, reveal mechanics, and admin moderation workflows.

DAO governance

On-chain governance with OpenZeppelin Governor patterns, voting modules, timelocks, Safe treasury controls, role management, and proposal execution pipelines.

RWA tokenization

Permissioned tokenization workflows, KYC/AML integration hooks, ERC-1400 and ERC-3643 style structures, and vault-oriented models using ERC-4626 and ERC-7540 where relevant.

GameFi and onchain gaming

In-game asset contracts, reward economies, tournament escrow mechanisms, anti-abuse controls, and provable randomness via Chainlink VRF.

Web3 infrastructure

Subgraph indexing with The Graph, event pipelines, wallet session handling, account abstraction (ERC-4337), and cross-chain messaging integrations.

If your project is heavy on contracts, see our dedicated Solidity smart contract development service. If you need a specialist profile, you can hire a dedicated Solidity developer.

Our tech stack

Modern dApp delivery requires explicit tooling choices, not generic "blockchain expertise" statements.

• Smart contracts: Solidity, OpenZeppelin, Hardhat, Foundry
• Frontend: React, Next.js, ethers.js, wagmi, viem, RainbowKit
• Indexing and infra: The Graph, Alchemy, Infura, QuickNode
• Wallets: MetaMask, WalletConnect, Safe, ERC-4337 account-abstraction wallets
• Oracles and messaging: Chainlink price feeds, VRF, CCIP
• ZK deployment paths: zkSync Era, Scroll
• AI integration: LLM-assisted contract analysis, AI-enabled product logic and workflow support

Supported EVM chains

We design for multi-chain deployment where product strategy requires it. Current active set:

• Ethereum
• Base
• Arbitrum
• Polygon
• BNB Chain
• Optimism
• Avalanche
• zkSync Era
• Berachain
• Monad
• Any EVM-compatible chain

If you are choosing deployment strategy, our guide on choosing the right EVM chain for your dApp gives a practical 2026 comparison.

Delivery process (5 steps)

1. Discovery and architecture

We define product scope, chain strategy, token economics, upgrade model, gas-cost assumptions, and frontend/backend split.

2. Smart contract development

Contracts are implemented with Solidity and OpenZeppelin patterns, tested in Hardhat or Foundry, and validated through strict code review and automated analysis.

3. Frontend and wallet integration

We build responsive React-based interfaces, wallet flows, transaction state handling, and user-safe signing experiences.

4. Testing and security audit

We run unit tests, integration tests, fork tests on realistic chain state, plus manual checks for reentrancy, role abuse, and access control flaws.

5. Deployment, verification, and monitoring

We deploy to target networks, verify contracts, prepare indexing pipelines, and hand over production runbooks with incident response paths.

Portfolio snapshots

DeFi staking and reward platform

• Chain: Polygon
• What we built: staking logic, reward distribution contracts, admin controls, dashboard integrations
• Outcome: stable launch with transparent reward accounting and lower manual ops overhead

NFT utility marketplace

• Chain: Base
• What we built: ERC-721 contracts, marketplace flows, metadata tooling, wallet login UX
• Outcome: faster mint-to-market workflow and improved buyer conversion via low-fee UX

DAO-enabled protocol tooling

• Chain: Arbitrum
• What we built: governance contract stack, proposal pipeline, Safe treasury integration
• Outcome: structured governance lifecycle with lower operational risk

Pricing and engagement

dApp budgets depend on complexity, security scope, and integration depth.

• Simple dApp MVP: usually starts around $8,000 to $20,000
• Production DeFi or marketplace systems: often $30,000 to $120,000+

We provide fixed-scope estimates after a free scoping call. You get a clear delivery plan, milestone structure, and risk assumptions before work starts.

Frequently asked questions

How much does dApp development cost?
Simple dApps with one core contract and basic frontend usually range from $8,000 to $20,000. Full DeFi or marketplace platforms with security hardening and integrations are typically $30,000 to $120,000+.

How long does dApp development take?
An MVP with a single core contract can be delivered in about 3 to 6 weeks. More complex DeFi, NFT, or DAO products usually take 8 to 16 weeks depending on scope, testing, and audit depth.

Which blockchains do you build dApps on?
We build on Ethereum, Base, Arbitrum, Polygon, BNB Chain, Optimism, zkSync Era, Berachain, Monad, and other EVM-compatible chains.

Do you provide smart contract audits?
Yes. We run automated analysis and manual security review for every contract we ship, and we provide a lifetime bug-fix guarantee on delivered code.

Can you integrate AI into a dApp?
Yes. We build AI and blockchain integrations including LLM-assisted contract analysis, on-chain AI workflow hooks, and AI-powered frontend features combined with Web3 wallet flows.

Ready to build?

If you need a dApp development company that can ship both contracts and product UX with production accountability, talk to us. Share your use case, target chain, and timeline, and we will return a practical scope and delivery plan.

Contact us