Top Blockchain Development Companies in Eastern Europe

Once a strange, mind-blowing technology underpinning Bitcoin, the conceptually new digital currency, and trusted mainly within the tech-geek community, blockchain is now widely known and adopted outside of it.  Along with Bitcoin, it became so popular as it managed to solve the double-spending problem outstanding in digital financial systems: how to prevent money copying and reusing? It became possible with blockchain where every transaction is recorded, timestamped, and verified by a network. It became possible with blockchain where every transaction is recorded, timestamped, and verified by a network. 

But today, blockchain is applied not in finance only. This technology powers software solutions in healthcare, logistics, art, gaming, and even in such innovation-resistant sector as government services. Institutional investors and large tech companies (like IBM, Microsoft, and JPMorgan) also have blockchain teams or products. So, no wonder many businesses are looking for high-quality, top-performing blockchain development teams to leverage this trending tech in their products.

If you are one of such businesses, this article is for you, because we researched the top blockchain development companies in Eastern Europe and came up with a shortlist of the top five, their key services, benefits, and the most prominent cases.

List of Top 5 Blockchain Development Companies

4ire labs

This company presents itself as an end-to-end blockchain development services provider specializing in Blockchain for FinTech and Banking. They feature expertise in a wide range of blockchain applications and technologies, including smart contracts, Web 3.0 wallets, IDO launchpad, DeFi protocol, smart contract audit, cryptocurrency, crypto marketing, AI/ML integration, play-to-earn blockchain-based gaming, and such blockchain platforms as Solana, Ethereum, Polkadot, Polygon, BSC, and many other.

Key services: Blockchain consulting and all-kind solution development, from smart contracts to advanced DEX and NFT marketplaces for P2E creation, DAO, and Layer 2 Development.

Why choose them: 300+ in-house engineers, 12+ years in blockchain development, Aurora bridge NEAR Protocol contributors, 200+ completed projects, 7 offices globally, high-level blockchain engineers, strong security expertise.

Case studies: serves both enterprises and startups in the development of DeFi services platform, crypto exchange, green assets wallet, cross-chain DeFi investment platform, a digital wallet for gold trading, algorithmic trading solution, marketplace for insurance policy, staking system for play-2-earn, NEAR-based NFT marketplace, carbon credit marketplace, charity NFT marketplace for celebs, full-stack development of zero-knowledge privacy protocol for financial products.

Chainza

Chainza is a relatively young research and development team focused on building decentralized infrastructure powered by blockchain in the domains of DeFi, RWA (Real World Assets) and governance. The company specializes in end-to-end Web3 services and smart contract engineering and positions itself as a strategic partner with commitment to trustful relationships with clients.

Key services: Full-stack Web3 engineering and QA, smart contact engineering.

Why choose them: Focus exclusively on blockchain engineering, grow their own talents, cultivate top-tier experts in thriving domains, and 5-star Clutch and Upwork rating.

Case studies: trading platform – No KYC Crypto Exchange, cross-chain swap platform, hybrid exchange service, cross-chain NFT teleport system.

Midas-solutions

This is a white-label blockchain development company: providing several fully developed solutions that clients can rebrand and sell as their own.

Key services: crypto exchange CeFi, NFT marketplace, DeFi wallet, CeFi wallet, launchpad (fundraising platform).

Why choose them: 30+ engineers with entrepreneurial experience, and experience in various facets of the FinTech sector.

Case studies: NFT marketplace, play-to-earn blockchain-powered game, decentralized staking platform run by a smart contract, centralized crypto exchange platform, NFT platform for creating and sending postcards, DeFi wallet aggregator.

DevBrother

Formerly LeadIntelligence, this blockchain development company provides diverse software development services in the format of remote team extension. They focus on Web3 development, cryptocurrency, NFT, and solutions for banking and healthcare.

Key services: Web3 development, web, mobile. QA, DevOps, UI/UX and various engagement models: staff augmentation, dedicated development team, and outsourcing.

Why choose them: access to a talent pool of 30K+ engineers, over 50 completed projects, attention to project management, and representatives in 3 countries, including the US.

Case studies: banking app, digital currency exchange platform, NFT swap platform.

Technorely

Technorely is a relatively young  company providing end-to-end blockchain development services, including consulting and tech audit and specialising in the fintech and healthcare domains. They provide a detailed description of the clients’ project journey and pay close attention to the discovery phase.

Key services: blockchain consulting and auditing, custom blockchain solutions, smart contracts, cryptocurrency integration, decentralized apps (dApps), tokenization services, security solutions.

Why choose them: customer-centric, PhD founders, 5+ years in the market, in addition to blockchain, specialize in fintech and healthcare, grow own talent with internship programs, trusted by an EU gov organization, numerous Clutch awards and 5-star rating.

Case studies: blockchain-based social survey platform, security token investment platform, crypto-trading platform, metaverse platform for personal growth and learning, a complex system for job tracking and costing.

Now you might be looking for some information about the blockchain technology itself, how it works, and what you can do with it. No worries, we’ve got you covered! Also, we prepared a guide on choosing the best blockchain development company for your specific business needs. Let’s dive in!

What is Blockchain and How Does It Work?

The term blockchain is quite self-explanatory: it refers to a virtual chain of blocks that functions as a decentralized digital ledger. Each block on this ledger consists of a set of recorded transactions. These transactions get collected together into blocks, one by one, by the blockchain nodes – the network of computers running special software that collectively maintain the blockchain. Once a node creates a new block of recorded transactions, it has to secure the block with a special hash, and then distribute the block copies to other nodes on this network so they can validate it and add it to the blockchain.

The hash is a fixed-length string of letters and numbers generated by a special formula (called a hash function) that turns any input (a file, message, or block of transactions) into a unique digital fingerprint. The main rule of the blockchain is that the hash of every new block has to contain the hash of the previous block. This way, the blocks literally link up into a chain.

Such hashing is the key feature of blockchain technology that ensures its ultimate security and anti-tampering nature: once a record or transaction gets packed into a block and this block is added to the blockchain – it cannot be changed anymore. Plus, there’s the network of other nodes that have the block copy and have to validate it.

So to fake a record on the blockchain, the node would have to change a block’s data, recalculate its hash, and then re-calculate the hash of every block after it – and all this before the network notices. Which is computationally impossible on popular secure public blockchains like Bitcoin or Ethereum.

Thus, by understanding the principle of how blockchain functions, we can define the core properties and benefits of blockchain:

• Immutability: You can’t easily change past records.
• Decentralization: No single party controls it.
• Transparency: Everyone can see what’s in the ledger.

How Does Blockchain Apply to App Development?

Although blockchain has become widely associated primarily with crypto mining, software development professionals noticed some useful features of blockchain they could apply in their domain.

Security

No need to invent data protection mechanisms as data on blockchain is immutable and cryptographically verified. Thus, when a blockchain-based app user adds a record proving they own land (as an NFT or certificate), this record gets verified on the blockchain and can’t be deleted or altered.

Transparency

All transactions and logic are visible and inspectable for anyone. This helps build trust between strangers who complete a transaction on an app, without needing blind faith in an app or its developers. So if we build a crowdfunding app on blockchain, anyone will see how much was donated, where funds went, and when. Also, it will be impossible to secretly move the money or fake results.

Trustless Logic

Blockchain apps don’t need a company or human mediation to enforce the rules. Instead, they can rely on smart contracts stored on the blockchain to do it automatically. Let’s take a traditional property renting app like Airbnb: the company mediates every booking, payment, and dispute. In a blockchain-based alternative, a smart contract holds the renter’s payment in deposit and automatically releases it when the stay ends.

Ownership

On a blockchain, users truly own their digital assets (like tokens or NFTs) – not the app or the company. For example, in a blockchain-based game, the gamer’s skins or weapons are NFTs in their wallet. So they can sell or trade them even outside the game.

Borderless Access

For blockchain-based solutions, there are no borders or gatekeepers. Anyone with an internet connection and wallet can use them. Thus, a person in a country with no banking service can use a blockchain lending app (DeFi) to borrow money, prove their identity on-chain, or get income by participating in DAOs or staking.

Most Popular Blockchain Applications

The information from the previous section leads us to the next question: what are the most common real-world blockchain applications that can be relevant for an extensive user base, not well-acquainted with blockchain and crypto?

In this section, you can find some blockchain app use cases that top blockchain development companies definitely have in their portfolios.

Smart Contracts

Blockchain systems don’t just store data – they allow people to run logic (rules or actions), and this logic is written in code. This code is the smart contract – a self-executing computer program stored on a blockchain like on a server. It automatically carries out rules and logic once certain conditions are met, defining and enforcing an agreement between parties, without needing trust or a trusted intermediary. Thus, smart contacts define what can happen on the blockchain, enforce the rules, and enable automation. 

Unlike traditional apps, whose logic is controlled by the software developers, can be modified at any time, and usually involves an admin or another mediating party to resolve disputes, smart contracts belong to the blockchain network, cannot be changed unless designed to be upgradable, and rely on public nodes and their consensus.

Smart contracts are widely used in solutions for automatic payments, insurance payouts, and funds escrow without middlemen.

Decentralized Finance (DeFi)

DeFi are financial services that use blockchain as the underlying technology and therefore don’t require banks, brokers, or other traditional intermediaries. DeFi relies on the smart contracts we discussed above to handle traditional financial transactions (borrowing, lending, trading, earning interest, insurance, and asset management. Ethereum is the most popular blockchain for DeFi, however other blockchains like Solana, Avalanche, and Polygon also support DeFi apps).

Green Finance

Green Finance is about investments, loans, and insurance aimed at supporting projects that benefit the environment and promote sustainability. In the context of blockchain development, we can speak about Green DeFi or blockchain-based carbon markets. Here, blockchain can help with transparent carbon credit trading, renewable energy generation tracking, and tokenization of green assets (e.g., 1 token = 1 kWh of solar energy you’ve funded or will receive, it can be traded, staked, or used as proof of your green investments.), and auditable Environmental, Social, and Governance reporting (ESG).

Decentralized Autonomous Organization (DAO)

DAO is an online, blockchain-powered co-op or company, but instead of being controlled by a CEO, it’s controlled by smart contracts and governed by the community of token holders. Smart contracts store the organization rules (e.g., voting procedures, spending limits), automatically enforce them, and perform fund allocation and payment releases. Crypto tokens represent voting power or ownership. The more tokens you hold, the more influence you may have in DAO. Participants gain these tokens for contributions, buying in, or as rewards. 

In a real-world scenario, a DAO can be used for voting on a new project funding. If the proposal passes, the smart contract releases funds to the proposer’s wallet – no central treasurer is needed.

Supply Chain Tracking

The supply chain can rely on blockchain technology to record, verify, and trace the movement of goods in a transparent and tamper-proof way. Instead of trusting paper trails, spreadsheets, or siloed systems, in blockchain, every event (shipment, inspection, handoff) is logged on a shared ledger that all parties can access but no one can alter. Thus, a food company can trace a shipment of lettuce from farm to shelf to ensure quality and recall it fast if needed.

Digital Identity & Authentication

With digital identity, users can prove who they are online. Today, most identity data is controlled by centralized authorities (governments, banks, tech companies), stored in their databases, and reused across the web via logins and verifications. However, such identity systems have certain inherent problems. For example, different platforms hold different pieces of a person’s identity, they are prone to data breaches and can be inconvenient, and the identity providers have full control over these data.

Blockchain can solve these issues, allowing the creation of a decentralized, self-sovereign identity (SSI), where users own and control their digital identity, not a company or government. Blockchain-Based Digital Identity solutions include decentralized Identifiers (DIDs), verifiable credentials (VCs), zero-knowledge proofs (ZKPs), and authentication via digital signatures.

Blockchain-based authentication solutions are particularly useful in voting systems, medical records, or proving education credentials without needing paper.

NFTs (Non-Fungible Tokens)

NFTs are unique digital assets tied to art, music, video, in-game, or metaverse items. NFT stands for Non-Fungible Token, where “Token” means a unit of value or data stored on a blockchain, and “Non-fungible” means it’s unique and irreplaceable. NFTs are used to prove ownership and authenticity of digital items, and how rare something is, and can be programmed to earn royalties on resale, unlock access to content or communities, and attach time-limited use, licenses, or expiration.

Gaming and Metaverse

When infused with blockchain, gaming solutions can provide revolutionary user experiences. First, it provides players with true ownership of their in-game assets via NFTs. Also, they can use crypto tokens as in-game currencies with real-world value. This, in turn, enables peer-to-peer trading, not just buying from the game company. And the best one: with blockchain, game items can be used across multiple games, stirring the players’ interest.

This way, they don’t just play a blockchain game – they create its economy, giving popularity to a new type of gaming – play-to-earn games.

How to Choose the Best Blockchain Development Company?

Choosing the best blockchain development companies to consider for trusting a costly solution development is a task that takes time and effort. We recommend evaluating the candidates by five key characteristics: the tech stack they operate with, their engineers’ skillset in blockchain development, the team composition they can offer, their understanding of your business goals, and what their clients say about them. Let’s discuss these, one by one.

Tech Stack

Blockchain-based apps are commonly referred to as dApps or decentralized apps. Thus, dApp development typically requires a combination of blockchain development skills, web/mobile app development, and cryptographic knowledge. Here we consider the tech stack breakdown and engineering expertise needed to build and maintain such apps.

Core Blockchain Layer

This is the layer responsible for all transactions, smart contracts, and consensus logic. Here, you need to decide on the blockchain network you will use. The most commonly used platforms include:

• Ethereum – the most mature and widely used platform, supports smart contracts (Solidity).
• Polygon – Ethereum-compatible platform that is cheaper and faster (Layer 2).
• Solana – a very fast, low-fee platform that offers different dev environments (Rust).
• Avalanche, BNB Chain, Near, etc. – other, less popular platforms, but each with some tradeoffs as compared to the above.

Business Logic Layer

This layer is backed by smart contracts we discussed in the previous section. Since it requires coding, you will have to rely on programming languages:

• Solidity – used for Ethereum, Polygon, and BNB Chain.
• Vyper – a Python-like alternative for Ethereum.
• Rust – for Solana and NEAR
• Move – for Aptos, Sui

Some developer tools adapted for blockchain development will also be useful:

• Remix IDE – a beginner-friendly online IDE for Solidity
• Hardhat / Foundry / Truffle – popular toolkits for advanced smart contract development and testing
• Ganache – unrolls a local blockchain for testing
• OpenZeppelin – secure smart contract libraries (ERC-20, ERC-721, access control)

Off-Chain Logic: Back-End

Like any other software applications, dApps also have some traditional services running, like services for speed, control, and integration, so make sure your solution developers include the technologies to support them:

• Blockchain node/RPC integration: Infura, Alchemy, QuickNode
• Event listening
• Indexing blockchain data: The Graph or custom indexers
• Queues and cron jobs for automation

For back-end development, such programming languages and frameworks are commonly used:

• Node.js or Express.js
• Python, FastAPI, and Django
• Go and Rust (best for performance-critical services)
• Databases for off-chain data storage like PostgreSQL, MongoDB, or Redis
• Decentralized file storage solutions (for metadata, images, videos) like IPFS and  Arweave

Frontend Layer

This is, by all means, an important part of any user-facing application. Even the most innovative and breakthrough solutions can fail with a poorly implemented UI that is unclear to users. Therefore, mind the tech stack to be used here:

• React (most common JS framework)
• Next.js or Vite for framework + SSR support
• TailwindCSS, Chakra UI, or custom styling
• Web3 libraries:
  • ethers.js for Ethereum-based apps
  • web3.js (older but still widely used)
• @solana/web3.js for Solana
  Also, there is a dedicated subset of tools for crypto wallet integration:
• MetaMask (Ethereum-compatible)
• WalletConnect – QR-based connection to mobile wallets
• Phantom for Solana
• Rainbow, Coinbase Wallet, etc.

Security, DevOps & QA

These are the critical components of blockchain solution development, not that evident but ensuring your application works smoothly. So make sure you include in your tech stack:

• Tools for smart contract auditing (manual + Slither, MythX)
• Tools for backend security (rate limiting, input validation, key protection)
• Monitoring instruments (blockchain logs, server health)
• CI/CD toolset for deploying backend/frontend and contracts

Domain Expertise

Considering the minimal tech stack needed for high-quality blockchain development, we recommend checking if the blockchain development company you are considering has the corresponding qualifications:

Blockchain layer: To work with this part of the system, blockchain developers should be skilled in blockchain fundamentals (consensus principle, forming blocks, hashing, addresses, gas fees), network structure (nodes, clients, RPCs), and choosing and setting up the nodes.

Business Logic: Here, engineering specialists have to be knowledgeable in smart contracts programming, token standards (ERC-20, ERC-721/NFTs, ERC-1155), event logging and interface definition, testing with frameworks like Chai/Mocha or Forge, and common blockchain-related vulnerabilities (reentrancy, integer overflows, front-running).

Back-End: Among the blockchain-specific skills for back-end developers, we can designate backend APIs interfacing with smart contracts, secure user auth with wallet signatures, secure key storage management, webhooks, and real-time event tracking.

User Interface: Look for front-end developers with good wallet integration skills (signing, connecting, address detection), skills in reading/writing to smart contracts using Web3 libraries, handling gas fees, network switching, and responsive UIs for dApp interactions.

Security, DevOps & QA: Consider software engineering specialists with knowledge in application audit (test coverage, custom error handling), best security practices for blockchain, including private key/custodial wallet protection and strategies to avoid injecting unsafe user data, as well as architecture optimization approaches (for faster transactions, lower gas fees, higher throughputs, or even improved UI).

The Team

If you’re building an app on top of an existing blockchain like Ethereum, Solana, or Polygon, not the blockchain itself, you will need software engineers who know how these blockchains work, but you won’t need those who develop core blockchain infrastructure (so-called Level 1 engineers). 

Mainly, you will require development specialists who know how to implement blockchain-based business logic, back-end engineers for API integration and off-chain logic, front-end engineers and designers for UI development, DevOps, and QA engineers. Consider these different roles we classified by application layers.

Business Logic Layer

This layer is where the blockchain rules of the app reside, coded in smart contracts. So smart contract engineer will be the primary role here. 

Back-End Layer

This is the “glue” layer that sticks together the general application logic and the blockchain logic. Therefore, the roles here are defined by expertise in both blockchain and “classic” back-end software development.

Front-End Layer

This is the application UI and UX that your end user will see and interact with – the dApp interface. Despite the fact that this is the layer any other consumer app has, these roles are also blockchain-specific.

Other Roles

In addition to roles that cover the coding functions, blockchain application development involves other roles that support the general SDLC and may work on multiple application layers.

Understanding of Your Project and Business Objectives

Using blockchain as your app’s underlying technology is not just a random technology choice driven by industry trends and popularity – it’s a decision to make a business model shift. So it’s critical that the blockchain development company of your choice understands your business goals. To make sure it does, you can pay attention to several service delivery aspects.

Level of Discovery and Consultation

Typically, blockchain development companies position themselves as pure tech vendors, product-first firms, or strategic partners. Companies from the first group expect clients to bring them a feature list and just fill their technical expertise gap. Thus, they offer minimal discovery or product discussion. Product-first teams take a purpose-oriented approach, asking questions like why you’re building, and what your market is, and tailor the blockchain stack to it. Finally, those who present themselves as strategic partners act more like fractional CTOs, helping their clients design tokenomics, legal strategies, DAO structures, and go-to-market plans.

Generally, good firms will ask questions to understand your business needs in any case, like:

• What’s your user acquisition strategy?
• How will your app make money or deliver value?
• What’s the lifecycle of a transaction in your ecosystem?
• Are you targeting Web3-native users or onboarding Web2 users?

Thus, you can choose the depth of vendor involvement you require, depending on the expertise level you’ve got on your in-house team. However, product-first and strategic partnership companies tend to be better at building trust and clients. Moreover, businesses that are new to the blockchain world, can leverage their experience for more than just technology guidance.

Industry Experience

Most blockchain development firms have software domain and industry specialization, like DeFi, NFTs, gaming or supply chain, finance, or prop tech. Even if they claim they work with everything, they will most likely have more experience in a couple of specific domains than in others. And such specialization is absolutely normal, we’d even say great. This means they know specific application types or industry-related challenges others will not have a clue about. 

The most important thing here is to understand what industries or application types a company really specializes in. To do this, pay close attention to their case studies, blog articles, and service pages on the website. The more materials you can find on specific topics, the more likely they have deeper expertise in them. Also, you can understand a company’s real experience in the industry or application type you’re interested in at your initial meeting with the company’s representatives. Make sure you prepare questions about the nuances of your industry to check.

Maturity of Process

Professional, reliable, and trustworthy software development companies have established and well-organized processes and company policies in place, even for processing prospects. So, if you only can see a company’s development process in a presentation nicely delivered by their sales rep, you can still make some judgments based on how they handle initial communication with you and your company and by what they offer.

Mature companies are able to provide their prospects and clients with plenty of well-structured and relevant documentation, are good at project analytics and planning, set clear timeframes and milestones, readily discuss the project’s KPI metrics and success conditions, and, most importantly, do not commit to anything the prospect asks for and honestly speak about what they cannot deliver.

Reviews and Reputation

Looking for real client reviews is a reliable way to form your opinion about a blockchain development company you’re interested in. Most companies today feature client reviews on their websites for social proof and trustworthiness. 

But you can also find up-to-date and honest reviews of blockchain development companies on reputable platforms that specialize in aggregating client feedback and evaluating service providers. The most popular are:

Clutch.co
Clutch is a well-known B2B review platform that offers detailed profiles of service providers, including verified client reviews, project portfolios, service focus areas, and various location-based, domain-specific, and industry-specific company ratings. 

GoodFirms.co
GoodFirms is another platform that evaluates IT service providers based on their performance, reliability, and client satisfaction. GoodFirms ranks blockchain companies based on deep research rankings, client testimonials, and their service offerings.

Techreviewer.co
Techreviewer focuses on compiling lists of top IT companies based on market research and analysis. For blockchain development firms, Techreviewer provides lists of top companies in specific niches and regions, info on key services, and client feedback summaries.

FAQ

How do I choose a blockchain development vendor if I have no previous experience in this sphere and don’t  want to get fooled?

This is the typical situation of clients our agency works with. We offer our clients to choose from several trusted blockchain development companies we previously worked with. This approach helps our clients to reduce risks and be able to focus on their solution development.

How much does it cost to develop a custom blockchain-based solution?

The cost of developing a blockchain solution in Eastern Europe typically ranges from $30,000 to $250,000+, depending on complexity, features, and the blockchain platform used. Simple smart contract-based apps (like token sales or NFT marketplaces) are on the lower end, while enterprise-grade solutions (like DeFi platforms or supply chain systems) cost more. Eastern European firms offer a healthy balance of technical expertise and competitive pricing compared to Western markets. Prices also vary based on team size, engagement model, and whether white-label components are used.

What are the industries where blockchain can be applied?

Blockchain is used across a wide range of industries beyond just finance. In supply chain, you can use blockchain to trace the origin of food and other critical products from production to shelf. In healthcare, blockchain solutions allow pharmaceutical companies to verify drug authenticity and prevent counterfeits. Real estate relies on smart contracts for automated title transfers. In energy and sustainability, decentralized platforms track and trade renewable energy credits or tokenized carbon offsets. Gaming use blockchain for NFT-based in-game assets while digital identity platforms provide self-sovereign identity systems.

Can I hire just one blockchain developer, not the entire team?

Yes, at Red Jumpers, you can care one specific developer as well as an entire team, depending on your needs. For example, this scenario is possible if you have an existing blockchain project that needs some adjustments or additions. Also, you can can hire a single specialist if you have a team in place but you need to find a substitution for a missing team member or to fill an expertise gap.