Blockchain Development Services

What Blockchain is

Blockchain is a cutting-edge system for storing and transmitting information in the form of a continuous chain of blocks containing transaction records. Each block is added to a shared database that automatically updates whenever a new transaction occurs. This database operates simultaneously across thousands of computers (nodes), ensuring that every participant has the latest version of the ledger. Such an architecture eliminates the need for a central server, making decentralization possible.

The core principle of blockchain is transparency. Every participant can verify any transaction at any point in time, while the data itself cannot be edited or removed once recorded. Each block contains a reference to the previous block, forming an unbroken chain all the way back to the very first block — known as the genesis block. This structure makes retroactive changes practically impossible, since altering one block would require rewriting the entire chain.

Originally, blockchain technology was primarily associated with cryptocurrencies such as Bitcoin. However, as the benefits of immutability, transparency, and decentralization became clear, forward-thinking banks and enterprises began adopting it. Today, blockchain extends far beyond finance:

• Supply chains use it to ensure product authenticity and monitor manufacturing processes.

• Intellectual property platforms leverage it to track copyright compliance and content ownership.

• Healthcare providers apply it to secure sensitive patient data.

• Businesses of all sizes employ blockchain to streamline financial operations and guarantee regulatory compliance.

In essence, blockchain has evolved from a niche technology for digital currencies into a foundational tool that is reshaping industries and everyday life.

Why Businesses Should Invest in Blockchain App Development

Implementing blockchain technology is no longer just an IT upgrade — it’s a strategic move that can fundamentally reshape the way companies operate. By combining cryptography, decentralization, and automation, blockchain applications bring businesses a new level of efficiency, transparency, and trust.

Here are the core benefits of adopting blockchain solutions:

1. Enhanced Security
Blockchain relies on advanced encryption and distributed networks, making data nearly impossible to hack or alter. This ensures protection from fraud, counterfeiting, and unauthorized access.

2. Full Transparency
Every transaction is recorded in a distributed ledger that cannot be edited. This creates a permanent audit trail, improving accountability and fostering trust among customers, partners, and regulators.

3. Data Integrity
Immutable records guarantee that business information remains consistent and verifiable over time. For industries like finance, healthcare, supply chain, and pharmaceuticals, this reliability is invaluable.

4. Streamlined Processes with Smart Contracts
Automated, self-executing agreements reduce the need for middlemen and speed up workflows. What used to take days — such as cross-border payments or supply chain verification — can now happen in near real time.

5. Cost Optimization
By cutting out intermediaries, minimizing errors, and automating repetitive tasks, blockchain significantly lowers operational costs while boosting overall efficiency.

6. Competitive Advantage & Innovation
Early adopters of blockchain apps position themselves as innovative, forward-thinking leaders. Beyond efficiency, blockchain enables brand-new business models — from DeFi and tokenization to digital identity management and beyond.

7. Stronger Customer Trust
Consumers and businesses alike want security, accountability, and transparency. Companies that integrate blockchain solutions signal reliability and modernity, building long-term customer loyalty.

Implementing blockchain into your business is not just an upgrade; it’s a transformation. Every benefit will become part of your company, ultimately shaping a more competitive future. As experienced developers, we strive to utilise these strengths to create unique solutions that align with our clients’ business goals.

Blockchain App Development Services

Developing blockchain projects requires not just programming language skills but a deep understanding of cryptography and how decentralized apps work. The journey from concept to realisation can be very challenging. And this is where professional blockchain developers come into play. They can not only simplify the journey, but also maximise the benefits for your company.

Polygant has been developing blockchain apps for businesses for 13 years. Contact us, and we will help you create your own cryptocurrency, crypto wallet, or crypto exchange.

Creating cryptocurrencies

When it comes to developing digital assets, there are two main categories of cryptocurrencies:

• Coins – built on their own proprietary blockchains.

• Tokens – issued and operated on top of existing third-party blockchains.

Stablecoins, for example, are typically classified as tokens because they are deployed on existing chains and pegged to the value of assets such as fiat currencies or commodities.

Developing a Coin

Creating a cryptocurrency coin involves building and customizing a dedicated blockchain. Developers usually work with an existing open-source blockchain framework, adapt it to specific business requirements, and then compile it into a working network. The process generally includes five key stages:

1. Defining the terms of reference – outlining the purpose of the coin, consensus mechanism (e.g., Proof of Work, Proof of Stake, Delegated Proof of Stake), and desired features.

2. Compiling the coin core and wallets – creating software for managing the coin, including desktop wallets for Windows and Linux.

3. Deploying full nodes – setting up servers to validate transactions, maintain the blockchain, and ensure network stability.

4. Building a blockchain explorer and mining pool – enabling users to track transactions in real time and allowing miners or validators to participate in securing the network.

5. Developing web and mobile wallets – providing user-friendly interfaces for coin storage, transfer, and management.

A proprietary blockchain coin offers complete independence and flexibility, but it requires more time, technical expertise, and maintenance resources.

Developing a Token

Tokens are typically faster and more cost-efficient to create since they don’t require launching a new blockchain. Instead, a smart contract is deployed on an existing chain, defining the token’s functionality, supply, and transaction rules.

The most popular platforms for token issuance include:

• Ethereum – the pioneer in token creation, using the ERC-20 and ERC-721 standards for fungible and non-fungible tokens.

• BNB Chain – known for low transaction fees and fast confirmation times.

• Polygon – a scaling solution compatible with Ethereum, offering reduced gas fees and higher throughput.

• TRON – focused on high-speed transactions and supporting entertainment and content-sharing platforms.

Token development is ideal for businesses looking to launch DeFi projects, NFT collections, loyalty programs, or in-app currencies without the overhead of maintaining their own blockchain.

Developing crypto wallets

A cryptocurrency wallet is a software application that enables users to interact directly with the blockchain. Through a wallet, users can check balances, track transaction history, send or receive transfers, and manage their digital assets securely. Importantly, the coins themselves never leave the blockchain — they remain recorded in the distributed ledger. What changes is the ownership of those coins, verified and updated through cryptographic signatures.

In many ways, a crypto wallet is similar to a bank account, but designed for digital currencies. It shows how many coins are associated with a given address, where they were received from, and where they were sent. Advanced multi-currency wallets go even further: they display exchange rates in real time and allow users to swap tokens within the app.

When developing crypto wallets, the most important aspects are security, usability, and scalability. Users need both confidence in the protection of their assets and convenience in everyday use. That’s why wallets are often designed with features such as two-factor authentication, biometric login, and integrated exchange functions.

Types of Crypto Wallets We Develop

• Custodial and Non-Custodial Wallets

  • Custodial wallets are managed by a service provider who stores private keys on behalf of users. They are easier for beginners but rely on trusting a third party.

  • Non-custodial wallets give full control to the user, who alone manages private keys. These are more secure but place responsibility on the owner.

• Web, Mobile, and Desktop Wallets

  • Web wallets are accessible via a browser, offering convenience and quick access across devices.

  • Mobile wallets run on iOS and Android, making it easy to pay, trade, or interact with dApps on the go.

  • Desktop wallets provide advanced functionality and often higher security, making them popular with experienced traders and institutional clients.

Each type of wallet has its own use cases, and choosing the right architecture depends on the target audience, level of security required, and integration with other blockchain services or fintech solutions.

Developing crypto exchanges and P2P platforms

A cryptocurrency exchange is a trading platform where users sell, buy, exchange coins, tokens, and stablecoins. It brings together sellers and buyers, keeping deals secure. A crypto exchange runs on a trading engine that checks if the orders placed are asset-backed, keeps the order book, and prepares data for displaying in the web or mobile app.

A P2P platform is a service where cryptocurrency buyers and sellers can interact directly, without involving any third party. This service only selects ads, reviews them and their creators, and provides escrow accounts. Unlike crypto exchanges, which are subject to strict rules and requirements, P2P platforms are more loyal to users.

We develop cryptocurrency exchanges and P2P platforms from scratch, as well as implement additional sections and products into existing services:

• Portfolio of crypto assets
• Launchpad for crypto projects
• Native token and stablecoin
• Referral programme.

Developing smart contracts

Smart contracts are used in fields where it’s possible to set up automatic, unmanned fulfilment of obligations by counterparties. A smart contract tracks whether the stipulated conditions were fulfilled. And blockchain technology protects its code from any tampering. No malicious person can change the code that contains the terms of the agreement between the two parties.

Decentralized apps are created based on smart contracts. Blockchain-enabled smart contracts ensure the fulfilment of obligations related to crypto products, make them secure, and provide a protected payment system for cryptocurrencies.

We develop smart contracts used for:

• Issuance of tokens and algorithmic stablecoins
• Oracles and prediction markets
• Staking and farming
• Decentralized exchanges and automated market makers.

Developing DeFi projects

Decentralized Finance (DeFi) initially referred to blockchain-based analogues of traditional financial instruments — exchanges, lending, and payments — built without centralized intermediaries. Today, DeFi has evolved into a vast, accessible ecosystem of decentralized applications (dApps) that run on public blockchains and give users full control over their digital assets.

The main goal of DeFi is to create a transparent, open, and permissionless financial system. Unlike traditional banking, it doesn’t require intermediaries or third-party trust. Instead, transactions and agreements are executed through smart contracts, ensuring automation, security, and fairness. While some skeptics point to the responsibility that comes with self-custody as a drawback, many view it as one of DeFi’s greatest strengths — teaching users financial independence and accountability.

Popular Types of DeFi Applications

• Algorithmic Stablecoins – Cryptocurrencies pegged to stable assets, maintaining value through on-chain algorithms and collateral mechanisms.

• Decentralized Exchanges (DEXs) – Platforms that allow peer-to-peer crypto trading without relying on a centralized operator.

• Decentralized Autonomous Organizations (DAOs) – Governance systems where decisions are made collectively by token holders.

• Liquidity Pools – Smart contract-based pools that allow users to provide liquidity and earn rewards from trading fees.

• DeFi Lending Platforms – Protocols where users can lend or borrow digital assets in a trustless and automated way.

• DeFi Insurance Platforms – Decentralized risk management solutions that protect users against hacks, protocol failures, and market risks.

Whether you’re building a DeFi startup or integrating blockchain finance solutions into your existing business, developing DeFi platforms can unlock new opportunities: from lowering costs and improving transparency to creating entirely new financial products.

Conducting security audits

Observing high security standards and resisting DDoS attacks is the cornerstone of any blockchain service. There have been hundreds of cases where attackers would either knock services out for keeps or steal millions of dollars worth of coins.

If you run a blockchain service, security should be your primary concern. We will audit your service to identify bottlenecks and help you reinforce them.

Cost of Blockchain App Development

Customers often ask us how much developing a blockchain-based project will cost them. Asking such a profound question, they only provide a couple of lines of description. It’s barely possible to estimate the project cost based on such scarce input data. However, we can give you some approximate costs of blockchain projects:

We can calculate the exact project value if you give us detailed terms of reference. It will help us estimate how many hours we will need to develop the project and calculate the total cost by multiplying the number of hours by the rate. The average rate of blockchain developers is $50 to $70 per hour, but it may reach $100 in some cases.