We design and engineer crypto wallets for fintech companies, exchanges, neobanks, and RWA platforms — from early-stage architecture to production deployment.
Talk to our architects
200+ blockchain projects delivered
Backed by prominent VC funds in Europe
Top-rated Crypto Wallet Developers
4IRE is a blockchain and fintech engineering company headquartered in Europe, with delivery teams across Ukraine, Poland, and globally. Since 2016 we’ve delivered 200+ products for fintech startups, exchanges, neobanks, and RWA platforms — including custody infrastructure for crypto exchanges, multi-sig treasury solutions for DAOs, and wallet SDKs embedded into neobank products that combine crypto and traditional banking.
Learn more about us
15 years
in development & consulting
250+
delivered projects
300+
developers and IT professionals
130+
graduates finished our courses
70%
annual company growth
7
offices across the globe
USA
Ondo Finance is a DeFi platform with an extra set of smart contracts that offers risk-isolated, fixed yield loans backed by yield-generating crypto assets, facilitating diverse investment opportunities.
UK
Aurora is a scaling solution for Ethereum, built on the NEAR Protocol, reduces gas fees and expands the Ethereum economy, enabling broader DeFi and NFT application development.
USA
Aztec provides a robust zero-knowledge privacy protocol for financial products, ensuring security for its users.
USA
Equadyne is a DeFi platform that simplifies asset management and trading with advanced automation and AI-driven insights, offering seamless and secure financial solutions.
USA
Convergence is the first project to make real asset exposure interchangeable within the DeFi space by fractionalising them with a user-friendly interface, composable with other DeFi protocols.
Build your Crypto Wallet Product with 4IRE!
Get a quoteSecurity architecture review, threat modeling, key management strategy, chain selection, compliance scope, team structure.
UX wireframes, user flows for all wallet interactions, security UX (recovery flows, MFA onboarding), design system.
Key management layer, chain integrations, transaction engine, admin panel, API endpoints.
Internal + third-party smart contract audit, penetration testing, key management review.
Automated test suite, manual edge-case testing, load testing, mainnet deployment.
Bug fixes, chain updates, new token listings, feature iterations, on-call for critical issues.
Start building your Crypto Wallet App with 4IRE!
Get in touchBlockchain networks
Polygon
Ethereum
Binance
NEAR
Polkadot
Token standards
BRC-20
ERC-20
TRC-20
BEP-20
Front-end
Angular
Node.js
React
Back-end technologies
Java
ProcessMIX
DevOps
AWS
Azure
ProcessMIX
Powered by:
With our internal crypto wallet, gamers can easily send and receive coins to friends in their contact list or directly within personal chats. Manage your in-game funds effortlessly with comprehensive transfer features.
Extensive industry experience
With successful collaborations with big names like Danske Bank, Basis Bank, and 50dss, our team brings comprehensive expertise in banking and crypto acquiring.
Diverse product portfolio
From our exclusive products like ProcessMIX and crypto bank software to partnerships with platforms like Datrics, we offer a range of solutions to suit diverse business needs.
European investors backed
By prominent VCs and angel investors across Europe, we ensure stability and resources for sustainable growth and innovation.
Global presence
Delivery teams across multiple regions let us support clients around the clock and adapt to local market and regulatory needs.
Developer-centric environment
Fostering a supportive atmosphere, we prioritize the well-being and professional development of our software engineers, ensuring high levels of productivity and efficiency.
Holistic approach to partnerships
Our approach extends beyond technical development, incorporating connections with legal and marketing vendors to ensure seamless integration and compliance across all aspects of your project.
Helen Petrashchuk
CEO
With 8+ years of business development experience, Helen is a driving force in fostering innovation and sustainable business solutions. She is a leading expert in blockchain within the 4IRE Group, specializing in blockchain consulting and enterprise solutions in DeFi, Fintech and GreenFi.
Vladyslav Malynovskyi
CMO
Digital Marketing professional with over 7+ years of transferable cross-industry experience. Proven track record in executing successful product launches in Blockchain, DeFi, NFT, Web3.
Yaroslav Tumanov
CTO
5+ years of experience in Solidity, leading world-class blockchain dedicated development teams. Yaroslav combines strong technical, consulting, and management skills, prepares the architecture vision for the DeFi and FinTech projects.
Alina Siraia
COO
Six years partnering with founders and product teams on crypto wallets, payment systems, and Web3 infrastructure. She connects business goals to technical delivery and stays accountable through every stage of the build.
At 4IRE, we’re more than a Crypto Wallet Development Company — we’re strategic investors in cutting-edge development products. We deliver innovative white-label solutions that maximize ROI and accelerate your market entry.
Launch your crypto bank in 2 months and save 100k.
Cost-Efficient
Save up to 40% compared to custom development, and reduce support costs by eliminating the need for a dedicated backend team.
No Vendor Lock-in
Maintain control over your assets and get complete ownership of intellectual property rights and code.
Low-code
Speed up backend development and introduce new features 3x faster leveraging low-code capabilities.
Designed by Industry Experts
Benefit from 8+ years of proven expertise in DeFi, wallets, and investment platforms, ensuring robust and reliable solutions.
Ready-to-go solution for carbon credit procurement, trading, and validation.
Carbon Credit Token Issuance
Convert metric tons of CO2 into fungible, tradable assets through tokenization for simplified management and trading.
Carbon Token Implementation
Easily tokenize your carbon credits on our platform without needing extensive technical expertise.
Integration with Secondary Markets
Our solution effortlessly connects project owners with other GreenFi projects and services in the blockchain ecosystem.
Custody Wallet Integration
Efficient APIs connect diverse crypto wallets to our carbon credit marketplace, offering customizable wallet support options.
Platform designed to support the creation, launch, and management of new crypto projects.
User-friendly interface
Provides an intuitive dashboard for project management and monitoring.
Security features
Incorporates robust security protocols to protect projects from cyber threats.
Fundraising tools
Offers integrated tools for managing token sales and crowdfunding campaigns.
Community engagement
Facilitates communication and engagement with potential investors and supporters.
Top Blockchain Consulting Company 2024
Top Smart Auditing Contract Company
Top Tokenization Company in 2025
Member of Nordic RegTech Association
DAO Maker Strategic Partner
Substrate Delivery Partner
Industry-leading clients:
Enterprise:
Startups:
Ethereum and EVM-compatible chains (Polygon, BNB Chain, Avalanche, Arbitrum, Base, Optimism, Linea), Solana, NEAR Protocol, Polkadot/Substrate, Tron, Cardano, and Cosmos SDK chains. For newer or less mature chains we assess feasibility during discovery — if the tooling supports production use, we'll work with it.
Yes. 4IRE operates on a full IP transfer model as a standard contractual position, not an optional add-on. Upon final payment, the client receives complete ownership of all deliverables — source code, architecture documentation, smart contracts, API specifications, design assets, and any custom tooling developed during the engagement. There is no ongoing licensing fee, no revenue share tied to wallet usage, and no vendor lock-in.
4IRE is not a wallet template shop. It is an enterprise blockchain engineering and consulting firm with a track record that spans regulated green finance, institutional DeFi, consensus-layer R&D, and high-throughput exchange infrastructure — including the Green Assets Wallet built on Chromia for Stockholm Green Digital Finance, backed by SEB bank, GIZ, and Swedish and German government authorities.
Yes. We use a modular chain adapter architecture where each blockchain is a separate module — you can launch on Ethereum first and extend to Solana, BNB Chain, Polygon, or other chains without a full rewrite. New L2s (Arbitrum, Base, Optimism) typically take 2–4 weeks per chain to add.
Yes. Our white-label wallet is a pre-built core with configurable branding, multi-chain support, admin panel, and API-first architecture. Deployment in 6–8 weeks vs 16–20 weeks for a fully custom build. During discovery we'll tell you honestly whether white-label works for your use case or whether you need a custom build.
