Smart Contract Development
Secure and optimised smart contracts for Ethereum, Solana, and other major chains.
We engineer audited, gas-optimised smart contracts for DeFi protocols, NFT platforms, DAOs, and token launches — with security-first development practices and formal audit preparation as standard.
Security and Correctness. No Exceptions.
Smart contracts are immutable once deployed. A bug in a traditional web application can be patched overnight — a bug in a smart contract can drain funds before the team is even awake. Security is not a phase at the end of smart contract development. It is baked into every line from day one.
We write contracts following established security patterns, run our own internal audit before engaging third-party auditors, and never deploy to mainnet without both a comprehensive test suite and an external security review.
We work with Solidity for EVM chains (Ethereum, Base, Polygon, Arbitrum, Optimism) and Rust/Anchor for Solana. We have experience deploying DeFi protocols, NFT contracts, token vesting schedules, governance systems, and cross-chain bridges.
Service Inclusions
Security-First Development
Reentrancy guards, access control patterns, overflow protection, and OWASP Smart Contract Top 10 applied as baseline requirements.
Gas Optimisation
Storage layout optimisation, calldata vs. memory patterns, and assembly-level optimisation reducing user costs by 20–40%.
Comprehensive Testing
Unit tests, integration tests, fuzzing with Foundry, invariant testing, and fork tests against mainnet state.
Audit Preparation
Internal security review, NatSpec documentation, test coverage report, and known-issues documentation prepared for auditors.
Upgradeability Patterns
Transparent proxy, UUPS, and diamond (EIP-2535) patterns implemented where upgradeability is required.
Cross-Chain Integration
Chainlink CCIP, LayerZero, and Axelar integrations for cross-chain messaging, token bridges, and multi-chain protocol deployment.
A Process Built for Clarity
No black boxes. No surprise invoices. Every project at Codewingz follows a disciplined four-phase process designed to reduce risk and maximise value at every stage.
Protocol Design
Mechanism design review, economic model analysis, and technical specification document before any code is written.
Architecture & Standards
Contract architecture, OpenZeppelin base contract selection, and access control model documented.
Implementation
Solidity/Rust development following security patterns. Code review on every PR.
Test Suite
Comprehensive test suite: unit, integration, fuzzing, and fork tests. 95%+ line coverage target.
Internal Audit & Remediation
Internal security review against known attack vectors. Issues categorised and remediated.
External Audit & Deployment
Third-party audit coordination, finding remediation, and mainnet deployment with monitoring setup.
The Tech Stack
We select technologies based on performance, scalability, and long-term maintainability, not trends.
Solidity
Specialized implementation of Solidity in the Language (EVM) space.
Rust / Anchor
Specialized implementation of Rust / Anchor in the Language (Solana) space.
Foundry
Specialized implementation of Foundry in the Testing & Development space.
Hardhat
Specialized implementation of Hardhat in the Development Framework space.
OpenZeppelin
Specialized implementation of OpenZeppelin in the Contract Library space.
Chainlink
Specialized implementation of Chainlink in the Oracles space.
Real-World Impact
DeFiYield Protocol
The Challenge
“A DeFi yield aggregator needed a suite of smart contracts for vault management and strategy allocation with a hard requirement for no critical vulnerabilities.”
The Solution
We delivered 8 Solidity contracts with Foundry test suite (1,200+ tests), internal audit finding 3 medium-severity issues resolved before external audit.
Key Performance Indicators
Common Inquiries
Everything you need to know about our specialized services.
Your Protocol Deserves Battle-Tested Contracts.
Share your protocol design and we will scope the smart contract work — including test coverage and audit preparation.