Engineering

Blockchain where it earns its place, honest advice where it does not

Blockchains are good at a few specific things: shared records that no single party controls, digital ownership and programmable payments. We build smart contracts, wallets, tokenisation platforms and decentralised applications for organisations in Nigeria, across Africa, the UK, Europe and the Americas, and we tell you plainly when a normal database would serve you better.

Get a quote

What we do

  1. 01

    Feasibility and architecture review

    A short, independent assessment of whether your idea needs a blockchain at all, and if so, which kind.

  2. 02

    Smart contract development

    Solidity contracts for Ethereum and compatible networks, and Rust programs for Solana, written with thorough tests.

  3. 03

    Wallet integration

    Connecting products to user wallets, or building custodial and embedded wallet options for people new to crypto.

  4. 04

    Tokenisation

    Digital representations of assets, loyalty points or access rights, designed with the relevant regulators in mind.

  5. 05

    Decentralised application front ends

    Clear, usable web interfaces for blockchain products, so ordinary users understand what they are signing.

  6. 06

    Provenance and verification

    Tamper-evident records for supply chains, certificates and documents, often anchored to a public chain at low cost.

When you do not need a blockchain

A lot of money has been spent putting things on a blockchain that did not need to be there. If one organisation controls the data and everyone trusts that organisation, a well-run database is faster, cheaper, easier to fix and simpler to keep compliant with data protection law. Personal data in particular rarely belongs on a public chain, because it cannot be deleted.

A blockchain starts to make sense when several parties who do not fully trust each other need to share a record, when users should hold their own assets without relying on you, or when payments and rules need to execute automatically and transparently. Our feasibility review works through these questions with you. If the answer is that you do not need a blockchain, we will say so and suggest what to build instead. That advice costs far less than finding out after launch.

Security comes first

Smart contracts are unforgiving. Once deployed, most cannot be changed, and any mistake can be exploited by anyone in the world within minutes. Many of the largest losses in the industry came from small coding errors in contracts that held significant value.

We work accordingly. Contracts are kept as small and simple as possible and built on well-reviewed libraries such as OpenZeppelin. Every function is covered by automated tests, including tests that try to break the contract with unexpected inputs. Before anything holding real value goes live, we arrange an audit by an independent security firm and fix what it finds. We also plan for the worst case: who holds the admin keys, how they are protected, how upgrades work if they are allowed, and what happens if something goes wrong.

Regulation is part of the design

Digital assets are regulated in most of the markets we serve, and the rules continue to change. In Nigeria, the Securities and Exchange Commission oversees digital assets and the businesses that offer them. In the UK, the Financial Conduct Authority supervises cryptoasset firms, and in the EU the Markets in Crypto-Assets regulation (MiCA) sets common rules. US regulators take their own, evolving view.

We are software engineers, not lawyers, so for anything involving tokens, investment or customer funds we ask you to take specialist legal advice early. What we bring is the technical side of compliance: identity checks and allow-lists built into contracts where required, transfer controls, clear records and an architecture that can adapt if the rules change. Building these in from the start is far easier than retrofitting them.

What you get

  • Feasibility report, including whether a blockchain is needed
  • Architecture and network selection with costs explained
  • Smart contracts with full automated test coverage
  • Coordination of an independent security audit
  • Web front end and wallet integration
  • Admin, monitoring and alerting tools
  • Key management and incident response plan
  • Technical and user documentation

Usual tools

Solidity, Hardhat, Foundry, OpenZeppelin, Ethereum, Polygon, Base, Solana, Rust, ethers.js, viem, WalletConnect. We choose tools for your requirements and your long-term running costs, not out of habit.

FAQ

Blockchain Development: your questions answered

Does my project need a blockchain?

Often it does not. If one organisation controls the data and users trust it, a conventional database is usually better. Our feasibility review gives you a clear answer before you spend money on development.

Which blockchain should we use?

It depends on cost, speed, security and where your users already are. We commonly work with Ethereum and compatible networks such as Polygon and Base, and with Solana, and we explain the trade-offs for your case.

Will our smart contracts be audited?

For anything that will hold real value, yes. We write and test the contracts and coordinate an audit by an independent security firm before launch.

Can you create a token for our business?

Technically, yes. Tokens can be regulated as securities or other financial products in Nigeria, the UK, the EU and the US, so we ask every client to take legal advice before launch.

How are private keys protected?

We design a key management plan for every project, using hardware wallets, multi-signature approvals or managed custody depending on the risk, and we never hold control of your production keys.

Often paired with

All services

We take on Blockchain Development projects for clients in Lagos, Abuja, Port Harcourt, Accra, Nairobi, Johannesburg, London, Manchester, Birmingham, Toronto, New York and Houston, and anywhere else you are.

Have a project in mind?

Email info@kollinzinc.com or send us a few details.