Smart Contract Development
Production-grade contracts written for correctness and gas efficiency: fungible and non-fungible tokens, staking, escrow, vesting, upgradeable proxy patterns and role-based access control.
We build blockchain systems your business can actually run — smart contracts, permissioned networks, tokenization and Web3 integration, designed, audited and operated end to end. Not a whitepaper. A system that goes live, stays live, and belongs to you.
Every engagement is scoped around a business outcome — settlement time, traceability, cost per transaction — and delivered by the same team that already builds your apps, websites and infrastructure.
Production-grade contracts written for correctness and gas efficiency: fungible and non-fungible tokens, staking, escrow, vesting, upgradeable proxy patterns and role-based access control.
Line-by-line manual review backed by static analysis, fuzzing and invariant testing. You get a severity-ranked findings report, fixes applied, and a re-test before anything touches mainnet.
Permissioned ledgers for groups of companies that need shared data without shared control: membership design, channel and privacy policy, consensus tuning, node provisioning and disaster recovery.
Token design that survives legal and economic review: supply and vesting modelling, multi-signature treasury, distribution mechanics, and the technical readiness required by exchanges and custodians.
Interfaces normal people can use. Wallet connection, clear transaction states, human-readable errors, gasless transactions through account abstraction, and a path for users who have never held a wallet.
Key management that passes an audit: MPC and HSM-backed custody, multi-signature approval flows, stablecoin settlement, and on/off-ramp integration with licensed providers.
Item-level provenance from raw material to shelf. QR and NFC tagging, IoT and ERP data ingestion, tamper-evident event history, and a public verification page your customers can actually read.
The chain is never the whole system. We build the indexers, event listeners, queues and APIs that connect it to your ERP, CRM, core banking or warehouse software — so operations stay in one place.
Blockchain is worth the effort when several organisations need to agree on the same record and none of them should be able to change it quietly. That is a narrow definition on purpose — and it still covers more of your operations than you might expect.
We will tell you before you spend the budget. A blockchain is a poor fit when:
In those cases we build the conventional system instead — and you keep the budget for what actually moves the business.
We choose the platform after we understand the requirement — throughput, privacy, cost per transaction, regulatory posture — never the other way round.
Six areas where our clients see a measurable return — shorter settlement cycles, fewer disputes, lower audit cost.
Cross-border settlement, programmable escrow, trade finance documentation and stablecoin treasury operations with a full audit trail.
Shipment and custody events written as they happen, shared with every partner in the lane, with exception alerts instead of email chains.
Farm-to-shelf and factory-to-buyer traceability that satisfies export requirements and gives consumers something real to scan.
Fractional ownership, transparent ownership records, automated distribution of rental income, and transfer rules enforced in code.
Consent management and record integrity: sensitive data stays off chain, while the proof that it was not altered stays on it.
Diplomas, licences and permits issued as verifiable digital certificates that any employer or agency can check in seconds without calling you.
Every stage ends with something you can inspect — a document, a demo, a report. Nothing moves forward until the previous stage is signed off, and you can stop at any block.
We map the process, identify who needs to trust what, and decide honestly whether a blockchain belongs here. Chain selection and a cost-per-transaction model come out of this stage.
What lives on chain and what stays off it, consensus and permission model, key management, upgrade path, and a written threat model reviewed with your security team.
A working slice on a test network — real contracts, real transactions, a clickable interface. Enough to demo to a board and to prove the numbers hold.
Contracts, back-end services, indexers, dApp and integrations built in two-week increments, with a running environment you can use after every one.
Internal audit, fuzzing and invariant testing, external audit coordination where the value at risk justifies it, plus a full dry run on a forked network.
Mainnet deployment, node and contract monitoring, incident response, and a documented handover of code, keys and infrastructure to your team.
Start small if the case is unproven, or bring us in as your blockchain team if it already is. Pricing is quoted after discovery, so you never pay for scope we have not yet understood.
For teams who need to know whether this works before committing a budget.
Full delivery of a production system, from architecture through mainnet launch.
For products with a roadmap, where the work does not end at launch.
CTG has been building mobile apps, websites, hosting and management software for years. Blockchain is an extension of that work — which is exactly why our systems ship instead of stalling at the pilot.
The chain, the API, the mobile app, the admin panel and the hosting come from the same team. No integration gap between three vendors blaming each other.
Threat modelling starts in architecture and audit is a named phase with its own deliverable. Contracts are immutable once deployed — we treat them that way from day one.
Repositories, deployment scripts, documentation, keys and infrastructure are transferred to your accounts. No hidden dependency on us to keep the system running.
We say no to projects that do not need a blockchain, and we say so during discovery rather than after the invoice. It costs us work and earns us the next three projects.
Ask one question: does more than one organisation need to trust the same record, without any single one of them being able to change it quietly? If yes, a blockchain earns its cost. If the answer is no, a well-built database will be faster and cheaper — and we will tell you so during discovery, before you commit a budget.
Public networks give you open verification and access to existing liquidity and wallets, at the cost of transaction fees and full transparency. Permissioned networks like Hyperledger Fabric give you privacy, control over membership and near-zero transaction cost, but you operate the infrastructure. Regulated industries and consortium projects usually go permissioned; consumer-facing assets and tokens usually go public. Many of our systems use both.
A proof of concept runs four weeks at a fixed fee. A production system typically takes three to six months depending on integration scope and audit requirements. We quote only after discovery, because a quote given before we understand your data flows is a guess — and guesses get corrected later at your expense.
You do. We design the key management scheme — multi-signature approval, MPC or HSM-backed custody depending on the value at risk — and we operate it during development on test networks only. Production keys are generated by your team in a ceremony we document, and never leave your control.
Building and operating blockchain infrastructure, traceability systems and enterprise ledgers is straightforward. Issuing tokens or handling digital assets touches rules that are still developing, so we structure those projects with your legal counsel from the architecture stage and build the compliance controls — transfer restrictions, identity checks, reporting — directly into the contracts. We are engineers, not your lawyers, and we work alongside them rather than around them.
No — and it is the most common reason blockchain products fail. We build with account abstraction and sponsored transactions so users sign in with an email or a phone number, never see a seed phrase, and never pay a gas fee. The chain runs underneath; the experience stays a normal app.
Send us the process you want to put on chain. Within two working days you will get a written first opinion — whether blockchain fits, which platform we would pick, and a rough timeline. No obligation, no sales call required.