Production-grade Web & Blockchain engineering — no templates, no shortcuts.
Most smart contract bugs aren't novel. They're access control mistakes, re-entrancy vulnerabilities, and untested edge cases that a proper development process catches before deployment. We write Solidity that auditors can review, users can trust, and engineers can maintain.
Sound familiar?
Your dev team can write Solidity but the contract hasn't been tested against re-entrancy, integer overflow, or access control exploits.
You need a smart contract auditor but your code isn't audit-ready — missing natspec, no test suite, and the logic is hard to follow.
You launched a contract with a bug that cost real funds. Now you need it rebuilt properly.
You have a product idea but no blockchain engineers — and you need production-grade contracts, not a tutorial clone.
What this means
A smart contract is immutable once deployed to mainnet. Every edge case, every permission, every inter-contract dependency needs to be correct before deployment — because there's no hotfix on the blockchain.
The majority of DeFi exploits aren't zero-day vulnerabilities. They're logic errors that a proper test suite would have caught, access control mistakes that a code review would have flagged, and re-entrancy bugs that are well-understood and preventable.
Nextelligentia treats smart contract development as safety-critical software engineering. Architecture before code. Tests before deployment. Audit before mainnet. Always.
0
post-audit critical vulnerabilities on our contracts
100%
test coverage before any audit or deployment
Mainnet-ready
Solidity from the first commit, not the last
Services
Architecture, development, testing, security review, and deployment — one team, no hand-offs.
We design contract systems before writing a single function — inheritance structure, access control patterns, upgrade strategy, gas optimisation approach, and inter-contract dependency mapping.
Included on all projects
ERC-20, ERC-721, ERC-1155, ERC-4626, ERC-2981, and custom standards — implemented correctly with full compliance to the specification, not copy-pasted from a tutorial.
Included on all projects
OpenZeppelin AccessControl, Ownable, multi-sig integrations, and time-lock governance — so the right addresses can do the right things, and nothing else.
Included on all projects
Unit tests, integration tests, fuzz testing, and invariant tests using Foundry and Hardhat. Your auditor gets a codebase with 100% coverage on critical paths, not a bare repo.
Included on all projects
Storage packing, calldata optimisation, loop gas analysis, and EVM opcode-level review — so your contracts are economical to interact with at scale.
Included on all projects
We produce audit-ready code with full natspec documentation and coordinate with your chosen auditor. After audit, we handle remediation and manage mainnet deployment.
Included on all projects
How it works
Every phase has a defined deliverable and your sign-off. Smart contracts don't get hotfixed after deployment — getting the process right the first time is not optional.
We map every function, permission, state change, and external dependency before writing code. Architecture decisions made wrong at this stage cause the most expensive bugs.
Clean, well-commented Solidity following established patterns — not clever code that confuses auditors and creates attack surface.
Comprehensive test suite covering expected behaviour, edge cases, and adversarial scenarios. We don't hand over a contract we wouldn't stake our own funds on.
Re-entrancy, access control, arithmetic issues, oracle manipulation, and front-running analysis — reviewed before the external auditor touches it.
We coordinate with your auditor, fix findings, re-test, and manage a staged mainnet deployment with monitoring in place from go-live.
Fit check
We're probably right for you if…
We're probably not the right fit if…
Tech stack
Languages
Frameworks
Testing
Networks
Tooling
Common questions
Audit-ready Solidity. Full test coverage. Deployed to mainnet only when it's ready.