You can’t quietly patch a smart contract on a Friday night. It has to be right on day one.
A smart contract is an agreement written as code. When the agreed event happens, it pays, releases or records automatically, with no invoice chasing and nothing to dispute. That certainty is the whole point, and it is also the risk. Once a contract holds real value, every mistake is public, permanent and often irreversible. Most failures are not exotic hacks. They are a missing permission check, an unsafe upgrade route or a single private key that controls everything.
At vi-tech, we write the business rules in plain English with your finance, legal and operations teams before a line of code exists. Every contract is tested far beyond the happy path, reviewed internally and audited independently before launch, then monitored once it is live. And because we also build the apps, dashboards and integrations around it, your contract connects cleanly to the systems your people already use.
$3.4bn
$23.6bn
45m
100%
was stolen in crypto hacks in 2025, much of it through weak key management and signing processes rather than clever code.
of real-world assets, from Treasury funds to gold, were tokenised on-chain by March 2026, up 66% in just ten weeks.
bills of lading are issued every year, the vast majority still on paper, couriered between ships, banks and buyers.
electronic bills of lading by 2030 is the commitment made by nine of the world’s largest container lines.
Code that keeps its word, and the safeguards around it.
Six pieces of one job: turning an agreement into code that runs on its own, survives scrutiny and fits the business around it.
Six layers inside every contract we ship.
The code that moves the money is only one part. These six layers decide whether it stays safe for years. Tap a marker to look inside.
A smart contract is only as safe as everything around it.
The biggest losses of recent years rarely came from a typo in the code. They came from compromised keys, careless signing and weak links between the contract and the outside world. That is why we never hand over a contract on its own. The same team designs the key management, the approval process, the backend that feeds it data and the app your people use to operate it.
2 reviews
24/7
0 single keys
control a production contract; admin rights sit behind multi-signature wallets and timelocks
before every mainnet launch: our own security review, then an independent third-party audit
on-chain monitoring after launch, with alerts and a rehearsed incident plan if anything looks wrong
Secure by default
Battle-tested libraries, least-privilege roles and pause controls, rather than clever code nobody else can verify.
Connected to your business
ERPs, CRMs, payment providers and mobile apps wired in, so the contract fits how your teams already work.
Understood by everyone
Plain-English specifications and dashboards that finance, legal and operations can follow, not just developers.
Six stages from first idea to a contract you can trust.
Every stage ends with something you can review and sign off. Nothing reaches mainnet on hope.
Every contract starts from a different place.
A new product, a contract that is already live, a private network shared by trading partners and a business automating trade payments each need a different mix of work. Here is where we would usually start.
Languages
Solidity · Vyper · Rust · Move
Frameworks
Foundry · Hardhat · OpenZeppelin Contracts · Anchor
Security
Slither · Echidna · Mythril · Certora Prover
Networks
Ethereum · Polygon · Arbitrum · Base · Solana · Hyperledger Fabric
Data & oracles
Chainlink · The Graph · Pyth
Operations
Safe multi-sig · Tenderly · Etherscan verification · Grafana
Shipping still runs on paper and trust. We write both into code.
Freight is paid against documents that cross oceans by courier, and disputes over laytime and demurrage can run for months. Our maritime team has lived those delays first-hand. We design contracts that hold funds and release them when agreed evidence is recorded, such as a surrendered electronic bill of lading, a confirmed arrival or an inspection sign-off, so every party works from the same facts.
Also building for fintech, supply chain, real estate, energy, insurance and professional services.
Three ways in. One team accountable for the outcome.
Proof of concept
Build to mainnet
Security & care
A fixed-price, four-to-six-week build on a testnet using your real workflow, to prove the idea before you commit to production.
Specification, development, testing, audit coordination and launch, delivered with the apps and integrations around it.
Audits of existing contracts, monitoring, controlled upgrades and incident response on a monthly plan.
Best for
teams testing whether blockchain fits
Best for
products and workflows going live
Best for
live contracts holding real value
