Blockchain is not suitable for every use case — but where trust, transparency and immutability matter, it changes what's possible. Barquecon's blockchain practice focuses on business outcomes first: we help you identify whether blockchain solves your specific problem, then architect and build the solution correctly — with audited code, gas-optimised contracts and a clear integration path into your existing systems.
Blockchain Development Services
Smart Contract Development
Solidity and Rust smart contracts for Ethereum, Polygon, BNB Chain and Solana — written for gas efficiency, security and upgradeability, with full test coverage before deployment.
DeFi Platform Development
Decentralised exchanges (DEX), lending protocols, yield farming, liquidity pools and token launchpads — architected with battle-tested DeFi patterns and re-entrancy protections built in.
NFT Marketplace Development
Custom NFT minting contracts (ERC-721, ERC-1155), marketplace platforms with auction and fixed-price listings, royalty enforcement and IPFS/Arweave metadata storage.
dApp Development
Full-stack decentralised applications — React frontend with Web3.js or Ethers.js integration, wallet connectivity (MetaMask, WalletConnect), and backend indexing via The Graph or custom subgraphs.
Private & Enterprise Blockchain
Permissioned blockchain networks using Hyperledger Fabric and Besu for supply chain traceability, document provenance, consortium data sharing and regulated-industry compliance use cases.
Smart Contract Audit & Review
Security-focused code review for existing smart contracts — reentrancy, integer overflow, access control vulnerabilities and logic flaws, with a written audit report and remediation guidance.
Our Blockchain Delivery Approach
Use Case Validation & Chain Selection
Not every problem needs blockchain. We validate your use case before committing to architecture.
- Problem fit assessment — blockchain vs. traditional database
- Chain selection: Ethereum, Polygon, Solana, Hyperledger or custom
- Tokenomics design (if applicable) and economic model review
- Regulatory and compliance considerations (VASP, MiCA, SEC guidance)
Contract Architecture & UI Wireframes
Smart contract structure and frontend design agreed before any code is written.
- Contract architecture diagram and data model
- Access control and role design (owner, admin, user)
- Upgrade strategy: proxy pattern or immutable contracts
- Frontend wireframes and wallet integration plan
Smart Contract Build & dApp Frontend
Test-driven development with 100% unit test coverage before any testnet deployment.
- Solidity/Rust contract development with Hardhat or Anchor
- Unit and integration tests — edge cases and attack vectors
- Testnet deployment and end-to-end dApp testing
- Gas optimisation pass before mainnet deployment
Security Audit & Production Deployment
Independent security review and structured mainnet launch with monitoring.
- Internal security audit — OWASP Smart Contract Top 10
- Third-party audit coordination (where required by client)
- Mainnet contract deployment and verification on Etherscan/Polygonscan
- Post-launch monitoring and incident response plan
Why Build Blockchain with Barquecon?
Security Is Not Optional
Smart contract bugs are permanent and often catastrophic — unlike traditional software. We treat every contract as adversarial code, testing against known attack vectors including reentrancy, flash loan exploits and access control failures.
Gas-Optimised by Default
We write contracts that minimise on-chain storage and computation — reducing transaction costs for your users. Gas efficiency is reviewed at the architecture level, not added as an afterthought.
Multi-Chain Expertise
EVM-compatible chains (Ethereum, Polygon, BNB Chain, Arbitrum), non-EVM (Solana), and private enterprise chains (Hyperledger Fabric). We select the right chain for your use case — not the one we're most comfortable with.
Full-Stack Delivery
Smart contracts are only part of the solution. We build the complete product — contracts, subgraph indexing, frontend dApp and backend services — so you get a working product, not just deployed Solidity.
Technologies We Use
Unsure if blockchain is right for you? We offer a free 60-minute assessment — we will tell you honestly whether a blockchain solution or a traditional database better serves your use case.
Ready to build on blockchain?
Share your use case and we will advise on chain selection, contract architecture and a realistic delivery timeline.
Get a Free Blockchain Consultation
