Full-Stack DApp Development — Smart Contracts, Web3 DeploymentsLeonardo Dutra
I deliver production-ready DApps end-to-end: audited smart contracts (Solidity/Rust), a polished Web3 frontend, indexing, and automated testnet/mainnet deployments—everything packaged in a private monorepo with CI/CD, docs, and clear runbooks.
What's included
Private Git monorepo
Contracts + frontend + infra with clear commit history.
Smart contracts in Solidity (EVM) or Rust (Solana)
Using proven libraries (OpenZeppelin/Anchor) with unit & integration tests (Foundry/Hardhat/Anchor).
Security controls
Role-based access, pausability/timelock, reentrancy guards; basic threat model and access-control matrix
Gas/fees & storage optimization report
Before/after metrics
Automated deployments
Testnet/mainnet with scripts, verified source (Etherscan/Blockscout/Solscan) and deployed addresses
Web3 frontend
React/Next.js with WalletConnect/MetaMask/Phantom, transaction status UX, and environment templates (.env.example)
Indexing & data layer
The Graph (EVM) or alternative indexer (e.g., Helius/Solana), plus ABI/IDL artifacts
Optional off-chain services
Go/Python webhooks, oracles (Chainlink), scheduled jobs
CI/CD pipelines
GitHub Actions/GitLab CI for test, lint, build, and gated deploys
Observability
Dashboards/alerts (Tenderly, Blockscout or similar), error tracking, basic on-chain monitors
Documentation pack
README, contract specs/ABIs, API examples, RUNBOOK (upgrade/rollback), user guide
Key management & ops
Multisig/timelock plan, secrets handling guidance, release checklist
Support options
Post-launch fixes and retainer tiers (optional)
Contact for pricing
Tags
Golang
Rust
Solana
Solidity
Web3.js
Blockchain Developer
Smart Contract Engineer
Solidity Engineer
Service provided by
Leonardo Dutra Fortaleza - Zone 1, Brazil
Full-Stack DApp Development — Smart Contracts, Web3 DeploymentsLeonardo Dutra
Contact for pricing
Tags
Golang
Rust
Solana
Solidity
Web3.js
Blockchain Developer
Smart Contract Engineer
Solidity Engineer
I deliver production-ready DApps end-to-end: audited smart contracts (Solidity/Rust), a polished Web3 frontend, indexing, and automated testnet/mainnet deployments—everything packaged in a private monorepo with CI/CD, docs, and clear runbooks.
What's included
Private Git monorepo
Contracts + frontend + infra with clear commit history.
Smart contracts in Solidity (EVM) or Rust (Solana)
Using proven libraries (OpenZeppelin/Anchor) with unit & integration tests (Foundry/Hardhat/Anchor).
Security controls
Role-based access, pausability/timelock, reentrancy guards; basic threat model and access-control matrix
Gas/fees & storage optimization report
Before/after metrics
Automated deployments
Testnet/mainnet with scripts, verified source (Etherscan/Blockscout/Solscan) and deployed addresses
Web3 frontend
React/Next.js with WalletConnect/MetaMask/Phantom, transaction status UX, and environment templates (.env.example)
Indexing & data layer
The Graph (EVM) or alternative indexer (e.g., Helius/Solana), plus ABI/IDL artifacts
Optional off-chain services
Go/Python webhooks, oracles (Chainlink), scheduled jobs
CI/CD pipelines
GitHub Actions/GitLab CI for test, lint, build, and gated deploys
Observability
Dashboards/alerts (Tenderly, Blockscout or similar), error tracking, basic on-chain monitors
Documentation pack
README, contract specs/ABIs, API examples, RUNBOOK (upgrade/rollback), user guide
Key management & ops
Multisig/timelock plan, secrets handling guidance, release checklist
Support options
Post-launch fixes and retainer tiers (optional)
Contact for pricing