Which chains and languages do you support?

We work across EVM chains (Ethereum, Polygon, Base, Arbitrum, BNB Chain) in Solidity and Vyper, and on Hyperledger Fabric in Go and TypeScript chaincode. We pick the chain to fit your trust, cost and throughput needs, not the other way around.

Do you make contracts upgradeable?

Where the use case needs it, yes, using UUPS or Transparent proxy patterns with clear admin controls and timelocks. Some contracts are deliberately immutable for trust reasons; we advise which model fits and document the trade-offs.

How do you keep gas costs down?

We optimise storage layout and variable packing, minimise on-chain writes, batch operations where possible, and benchmark every function with gas reports so you see the cost of each path before it ships.

Contract builds

Blockchain Solutions

Smart contract development

Gas-efficient, audited Solidity and chaincode that does exactly what your business rules require.

We build production smart contracts in Solidity, Vyper and Hyperledger chaincode for EVM chains and permissioned ledgers. Every contract ships with full Foundry or Hardhat test suites, including invariant and fork tests, plus Slither static analysis before deployment. We use battle-tested patterns such as OpenZeppelin libraries and upgradeable proxies rather than reinventing risky primitives.

Talk to an expert All Blockchain Solutions services

What you get

Included in this service

ERC-standard contracts

ERC-20, ERC-721, ERC-1155 and custom logic written to current standards.

High test coverage

Unit, fuzz, invariant and fork tests so behaviour is provable, not assumed.

Gas optimisation

Storage layout, packing and opcode-level tuning to cut transaction costs.

Safe upgradeability

Proxy patterns (UUPS, Transparent) with controlled, auditable upgrade paths.

What you walk away with

Audited contract source with NatSpec docs
Foundry or Hardhat test suite with coverage report
Deployment and verification scripts
Gas report and storage-layout map
Deployment and rollback plan
Post-delivery support window

How we engage

A clear path from problem to outcome

Discovery and protocol selection

We map your use case, trust model and stakeholders, then choose the right chain and consensus: public EVM (Ethereum, Polygon, Base, Arbitrum), a permissioned ledger (Hyperledger Fabric, Quorum), or a Layer 2. We confirm whether a blockchain is actually warranted before any code is written.

Architecture and threat modelling

We design the on-chain and off-chain split, data and key-management model, gas and fee strategy, and upgrade path. Every contract is threat-modelled against known attack classes (reentrancy, access control, oracle manipulation) so security is built in, not bolted on.

Build, test and audit

We develop in Solidity, Vyper or chaincode with full unit, fork and invariant test coverage using Foundry or Hardhat. Contracts go through static analysis (Slither), fuzzing and an internal security review before any deployment to a public or production network.

Deploy, verify and operate

We deploy with reproducible scripts, verify source on the explorer, and hand over runbooks, monitoring and indexing (subgraphs, event listeners). Optional managed operations cover key rotation, upgrades and incident response after go-live.

Frequently asked questions

Build it right.
Secure it for good.

Tell us what you're building or securing. We'll bring the engineers, the security team and the trainers, plus a clear, costed plan to get you there.

Contact UsExplore Services

AI-powered cybersecurity 24/7 expert support Trusted across industries

Join our newsletter

Be up to date with everything about NUEXUS

By subscribing you agree with our Privacy Policy