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Web3 & blockchain development

We build smart contracts, dApps, and Web3 integrations that reach production and stay there. Security-first, audit-ready, and designed to fit the systems you already run.

If blockchain is not the right answer for your case, we tell you before you spend money on it.
Building software since 2022
Security reviews and audit preparation
EU jurisdiction, Latvia and Italy
EU-REGISTERED · MiCA-AWARE
SubWise logo
Upwork logo
Nexi logo
Audi logo
Finverse logo
Nordisk Regnskab logo
Chainweb client logo
Avon logo
Ecoverde logo
Condominio 24 logo
Upwork logo
Nexi logo
Finverse logo
Nordisk Regnskab logo
Chainweb client logo
Audi logo
Avon logo
SubWise logo
Ecoverde logo
Condominio 24 logo

Web3 & Blockchain in Real Products

Web3 and blockchain technologies are most effective when they are part of a broader system, not isolated layers. This allows decentralised logic to add value without compromising usability or control.

We design Web3 and blockchain components that integrate seamlessly with:
  • web platforms

  • mobile applications

  • backend services and APIs

  • existing enterprise systems

Tech Stack

Built on What Actually Ships in 2026What Ships in 2026

We work with production-ready Web3 and blockchain technologies, selecting the stack based on scalability, security, and regulatory context, including the infrastructure that became standard since 2025.

EVM Blockchains

Ethereum, Polygon, BNB Smart Chain, Arbitrum, Optimism, Base.

NEW IN 2026

Account Abstraction

ERC-4337 smart wallets, gasless transactions, social recovery flows.

Smart Contracts & Token Standards

Solidity, ERC-20 / 721 / 1155.

NEW IN 2026

RWA & Tokenization

Compliant frameworks for tokenizing real-world assets.

Web3 Infrastructure & Indexing

Nodes, indexing, backend data layers.

Oracles & External Data

Price feeds and off-chain inputs.

Wallets & Web3 Integrations

MetaMask, WalletConnect, Web3 libraries.

Hybrid Architectures

Clear on-chain and off-chain separation.

Private & Permissioned Setups

Enterprise and consortium blockchain deployments.

Web3 technology stack — Solidity, Hardhat, Ethers.js, IPFS, MetaMask

What We Build with Web3 & Blockchain


We ensure decentralised components remain auditable, predictable, and isolated from core application logic where needed.

Our Web3 and blockchain services cover both on-chain and off-chain components, including:
  • Web3 technology stack — Solidity, Hardhat, Ethers.js, IPFS, MetaMask

    Smart contracts and decentralised business logic
  • Web3 technology stack — Solidity, Hardhat, Ethers.js, IPFS, MetaMask

    Web3-enabled applications (dApps)
  • Web3 technology stack — Solidity, Hardhat, Ethers.js, IPFS, MetaMask

    Token-based systems and digital assets
  • Web3 technology stack — Solidity, Hardhat, Ethers.js, IPFS, MetaMask

    Wallet-based authentication and access control
  • Web3 technology stack — Solidity, Hardhat, Ethers.js, IPFS, MetaMask

    Transaction handling and on-chain event tracking

Smart Contracts

Smart Contract Security: Immutable Means You Only Get One Chance

Once a contract is deployed it holds real value and cannot be quietly patched. We design with a strong focus on four things:

  • Deterministic and transparent logic The same inputs produce the same result, and anyone can verify why.
  • Role-based access control Every privileged function sits behind a named role that is documented and revocable.
  • Gas efficiency and cost awareness Storage layout and loops decided with transaction cost in mind, not discovered after launch.
  • Upgrade and versioning strategy Settled before deployment, because a contract that cannot change is a decision you make once.

Where required, we support security reviews and audit preparation to reduce deployment risk.

Logic Access Gas Upgrade

Web3 & Blockchain Integration

Most Web3 projects require integration with traditional infrastructure.
This enables decentralised features while preserving a familiar user experience.
We integrate Web3 and blockchain components into:
existing web and mobile applications
backend services and databases
identity, authentication, and permission systems

Compliance & Control

Built for EU Regulatory Reality, Not Just the Whitepaper

Web3 systems must balance decentralisation with operational reality. We take into account:

  • Regulatory and compliance considerations, MiCA included
  • Separation between on-chain and off-chain logic
  • Cost predictability and gas optimisation
  • User experience without unnecessary complexity

Our goal is to make Web3 practical, controlled, and understandable.

EU · MiCA

MiCA-aware by design

We are an EU-registered team building token issuance, stablecoin-adjacent, and DeFi-facing systems with MiCA authorisation, disclosure, and operational requirements considered from the architecture stage, not added after a legal review.

ON-CHAIN / OFF-CHAIN
On-chainsettlement
Off-chainKYC & data
Personal data stays off-chain by design. GDPR and MiCA pull in the same direction here.
Web3 technology stack — Solidity, Hardhat, Ethers.js, IPFS, MetaMask

Web3 Project Rescue: Not All Projects Start Clean


We also work with existing Web3 and blockchain implementations that require:


  • smart contract refactoring or optimisation
  • security improvements
  • architecture simplification
  • better integration with off-chain systems

Our work begins with a technical audit, followed by targeted improvements rather than full rewrites whenever possible.

Why Chainweb for Web3 and Blockchain

Web3 engineers with strong traditional engineering background

Security-first smart contract design
Focus on real products, not experimental hype
Web3 technology stack — Solidity, Hardhat, Ethers.js, IPFS, MetaMask
Clear separation of on-chain and off-chain logic
Experience integrating Web3 into existing platforms
End-to-end delivery from architecture to production

What Clients Say About Our Web3 & Blockchain Development

★★★★★

Their commitment to quality, transparency, and client success is evident throughout the project.

M. MorettiOwner · Fincons Group
Verified review on Clutch

Web3 & Blockchain Services

Questions We Get Before Every Blockchain Project

Most of these come up in the first call. If yours is not here, ask it directly and you will get a straight answer, including when the answer is that blockchain is not what you need.

Not Sure Which Development Service Fits?

Four ways we build software. Pick the one that matches where you are.

Web3 & Blockchain

You need smart contracts, tokens or a product built on blockchain.

This page →

Web Apps

You need a platform, portal or internal tool that runs in the browser.

Learn more →

API Development

Your CRM, payments and other systems need to share data automatically.

Learn more →

Cybersecurity

You need an audit, stronger protection or proof of GDPR compliance.

Learn more →
See also in our blog

    Ready to Build Your Blockchain Product?

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    Chiara Mastino
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