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I’m building a production-ready crypto wallet in Flutter that can live on both iOS and Android. The core goal is to give end users an all-in-one experience: safely store multiple coins over 50+ blockchains, send and receive across chains, swapping, debit card payments, on/off ramp and keep an eye on real-time price movements without leaving the app. Here’s how I picture the flow. On first launch the user creates or imports a BIP-39 seed phrase; all keys stay on-device, encrypted. From there they can switch between BTC, ETH and LTC accounts, view balances pulled from the relevant chains, initiate transactions with adjustable fees, and watch live price data (CoinGecko API or similar). A simple, intuitive UI built with Flutter’s Material 3 would be ideal, but I’m open to Cupertino styling tweaks for iOS polish. I’ll need: • Full Flutter/Dart source, cleanly structured and documented • Build-ready Android (.aab) and iOS (.ipa or TestFlight) outputs • Brief setup guide covering wallet creation logic, key storage approach, third-party APIs, and steps to compile new builds Security best practices are non-negotiable—please defend against common mobile attack vectors, use strong encryption for private keys, and never route seed phrases through external servers. If you have prior experience with packages like web3dart, bitcoin_flutter, flutter_secure_storage, or similar, that will give us a head start. Let me know how you would tackle cross-chain transaction handling and any suggestions you have for future token expansion. Looking forward to your approach and timeline.
ID do Projeto: 40017093
101 propostas
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Ativo há 1 mês
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101 freelancers estão ofertando em média $1.163 USD for esse trabalho

With over 7 years of experience in Flutter development and a deep understanding of blockchain technology, I understand your need for a reliable and secure cross-chain wallet app. Your project's core goal of providing an all-in-one crypto wallet experience aligns perfectly with my expertise in developing user-friendly and feature-rich mobile applications. I have successfully delivered similar projects in the blockchain space, including integrating web3 protocols and implementing secure storage solutions for private keys. My experience with packages like web3dart and flutter_secure_storage will definitely give us a head start in tackling cross-chain transaction handling and ensuring the security of user data. I am committed to delivering a clean and well-documented Flutter/Dart source code, along with build-ready outputs for Android and iOS platforms. With a focus on security best practices and a track record of implementing encryption techniques for sensitive data, I am confident in meeting your project requirements. I am excited to discuss your project further and share my approach and timeline for delivering a high-quality cross-chain wallet app. Let's collaborate to bring your vision to life and create a seamless crypto wallet experience for users across multiple blockchains.
$1.200 USD em 20 dias
8,1
8,1

HELLO, WE HAVE WORKED ON SIMILAR PROJECTS AND CAN PROVIDE EXAMPLES. I have reviewed your requirements and fully understand your need to build a production-ready Flutter wallet supporting 50+ blockchains with secure key storage, cross-chain transactions, swaps, debit card payments, and real-time price monitoring. With 10+ years of experience in Flutter/Dart, blockchain integrations, and mobile security, I can deliver a clean, documented codebase, build-ready Android (.aab) and iOS (.ipa/TestFlight) outputs, and a setup guide detailing wallet creation, encryption, and API usage. My approach will include using web3dart, bitcoin_flutter, and flutter_secure_storage for secure key handling, implementing on-device encrypted storage, and designing modular transaction logic to simplify future token expansions. I can start immediately, ensuring high security standards and production readiness. Awaiting your positive response. Thanks christina
$1.200 USD em 30 dias
8,3
8,3

Hello, HAVE HANDS-ON EXPERIENCE WITH SUCH PROJECT I have 12+ years of proven experience in mobile and blockchain development and confidently understand your requirement. The project goal is to build a secure, scalable, and user-centric Flutter crypto wallet supporting multi-chain assets, transactions, swaps, and real-time price tracking. Core features: -->> Multi-chain wallet with BIP-39 seed phrase management stored securely on-device -->> Send, receive, and swap assets across 50+ blockchains -->> Real-time price data and portfolio tracking -->> Integration with debit card payments and on/off ramp services -->> Clean, Material 3 based Flutter UI with iOS/Android optimization Approach: Secure key storage, clean architecture, encrypted transactions, efficient API integrations, and agile development workflow. I’ll reach out in chat as I have some queries to ask regarding the project to proceed further.
$1.200 USD em 30 dias
8,4
8,4

Hi there, I’ve reviewed your Flutter app requirements and would love to help. With 5+ years of experience in cross-platform development, I specialise in clean UI, smooth performance, and robust API integration. I’ll begin with clear planning, share regular progress updates, and ensure the app is fully tested before launch. Let’s connect to discuss your vision — I’m ready to get started! Best, Bhargav Flutter Developer | Android & iOS Expert
$1.200 USD em 30 dias
6,9
6,9

I am confident that my skills in Mobile App Development, iPhone, Android, Objective C, and Dart are a great match for the Full Time Dev For Flutter based Cross-Chain Wallet App project. I am eager to tackle the challenge of creating a secure and user-friendly crypto wallet that meets your requirements. The budget can be adjusted once the full scope is discussed, and I am committed to delivering within your budget. Please review my 15 years of experience and completed work. Let's discuss the job details and get started on this exciting project together.
$1.050 USD em 21 dias
7,0
7,0

As an experienced Flutter developer with a strong background in mobile development, I would be the best fit for your crypto wallet project. Alongside my development skills (Flutter/Dart and iOS/Android build implementations), my understanding of key security measures is top-tier. I've gone toe-to-toe with common mobile attack vectors, implemented highly secure encryption for private keys, and ensured that sensitive information never routes through external servers. In terms of cross-chain transaction handling, I've adeptly worked with packages like web3dart, bitcoin_flutter, and flutter_secure_storage - these skills will definitely give us a head start on the project. My approach would be centered around creating a simple yet intuitive UI built with Flutter's Material 3 design with a subtly refined Cupertino styling for iOS users' seamless experience. Moreover, I am dedicated to providing daily progress reports and clear communication throughout the project for utmost transparency. Choosing me means opting for both competence and effective error-free service delivered within the timeframe you need. Let's get your users their all-in-one crypto experience without compromising on security or usability!
$1.200 USD em 30 dias
6,9
6,9

⭐⭐⭐⭐⭐ Valuable Client, CnELIndia and I, Raman Ladhani, can deliver your production-ready Flutter crypto wallet with a clear, secure, and scalable workflow. We’ll architect a clean Flutter/Dart codebase using Material 3, with selective Cupertino refinements for iOS polish. For security, we’ll implement BIP-39 generation/import, on-device key derivation, hardware-backed encryption via flutter_secure_storage, and full isolation of seed phrases from all external services. For cross-chain handling, we’ll integrate web3dart, bitcoin_flutter, and chain-specific RPC endpoints to fetch balances, build/serialize transactions, and broadcast with dynamic fee selection. Modular chain adapters will make adding future assets straightforward. Real-time pricing will use CoinGecko (or equivalent) with rate-limited, cached requests. You’ll receive documented source code, build-ready .aab and TestFlight/.ipa outputs, and a concise setup guide covering wallet logic, storage, APIs, and build steps. Our team has delivered multiple blockchain apps and can confidently execute this end-to-end.
$1.125 USD em 7 dias
7,0
7,0

Hello there Hope you are doing well as you are looking for a "Build a MOBILE APPLICATION" so will make the same as you want , I have already develop and Design the so many Application, - I will use latest technology to develop your Application - I will share daily update with you - I Will deliver your project within timeline - After project completion will share complete source code - I will provide 1 year support our develop work - I have 10+ year experience in Web & App development - I will make the 100% responsive design , fast loading , SEO friendly and all - I will provide you super admin panel there you can manage the whole thing Please initiate the chat so will discuss together and all Thanks & Regards Dheeraj K.
$750 USD em 12 dias
7,0
7,0

Hi there, ★★★ Mobile App Development / Android App Development Expert ★★★ 7+ Years of Experience ★★★ To successfully develop a production-ready crypto wallet in Flutter, I will take the following approach: - Utilize Flutter and Dart to create a clean, intuitive UI that adheres to Material 3 guidelines while ensuring iOS compatibility with Cupertino styling. - Implement BIP-39 seed phrase functionality for secure wallet creation, ensuring all keys remain encrypted on the device. - Integrate cross-chain functionality to allow users to send, receive, and swap multiple cryptocurrencies across over 50 blockchains. - Use strong encryption methods for private key storage and follow security best practices to defend against common mobile attack vectors. - Incorporate real-time price tracking through APIs like CoinGecko. - Provide full Flutter/Dart source code, build-ready outputs for Android and iOS, and a brief setup guide covering all essential aspects of the wallet. - Leverage my experience with relevant packages to facilitate cross-chain transaction handling and ensure the wallet is scalable for future token expansions. I look forward to connecting at your convenience to ensure the project's success. Best Regards, TechPlus Team
$1.200 USD em 45 dias
6,1
6,1

Hello, I am a friendly and reliable full-stack developer with solid experience in Shopify, WordPress, PHP, Laravel, React, Node.js, Odoo, and mobile app development (Flutter/React Native). I love building clean, fast, and user-friendly web and mobile solutions. Whether you need custom features, API integrations, Odoo workflows, mobile apps, or UI/UX improvements, I’m here to help. I communicate clearly, deliver on time, and always aim to build long-term working relationships. Happy to support your project anytime! With Regards! Nikhil
$1.500 USD em 7 dias
6,2
6,2

Hi Didrik, We’ve developed several crypto wallets, including a multi-chain wallet that supports Bitcoin, Ethereum, and Binance Coin. We also built a web3 browser for dApps, enabling users to connect their wallets and interact with smart contracts. Our experience with web3 technologies and security best practices makes us a strong fit for your project. For your wallet, we can use a secure backend to manage sensitive data like seed phrases and private keys, while also providing a fully functional web3 browser. This way, we can focus on delivering a high-quality product without compromising on security. Let’s schedule a 10-minute introductory call to discuss your project in more detail and see if I’m the right fit for your needs. I’m eager to learn more about your exciting project. Best, Adil
$1.381,88 USD em 21 dias
5,7
5,7

This sounds like something I’d genuinely enjoy building. Creating a seamless, all-in-one crypto wallet that prioritizes user security and offers an intuitive interface aligns perfectly with my expertise. I have extensive experience with Flutter and Dart, and I'm adept at integrating multiple blockchains while ensuring a streamlined user experience. With a strong focus on security best practices and proven results in similar projects, I am confident in delivering a polished, production-ready app that meets your vision. Happy to outline how I would turn this plan into a working solution. Chat soon, Anne S
$1.050 USD em 7 dias
5,9
5,9

Hi there. I’d love to help build your production-ready crypto wallet in Flutter, focused on security, seamless cross-chain transactions, and a smooth user experience. I’ll implement robust encryption for seed phrases and keys, integrate CoinGecko or similar for real-time price data, and ensure a responsive design with Flutter’s Material 3 (with Cupertino tweaks for iOS). I’ll provide clean, documented source code, along with build-ready Android/iOS outputs and a setup guide to make future builds easy — Best regards, Tayo.
$1.200 USD em 15 dias
6,0
6,0

Hi there, Good morning I am Talha. I have read you project details i saw you need help with Android, Blockchain, Dart, Mobile App Development, Flutter, iOS Development, iPhone, Android App Development, Objective C and Cryptocurrency I am excited to submit my proposal for your project, which focuses on a comprehensive project plan. To begin, we will thoroughly understand your project's objectives and requirements, ensuring alignment on scope and goals. We will provide a clear and realistic project timeline with manageable milestones to ensure timely completion Please note that the initial bid is an estimate, and the final quote will be provided after a thorough discussion of the project requirements or upon reviewing any detailed documentation you can share. Could you please share any available detailed documentation? I'm also open to further discussions to explore specific aspects of the project. Thanks Regards. Talha Ramzan
$750 USD em 11 dias
5,4
5,4

Hi, I can build your production ready multi-chain crypto wallet in Flutter with secure on-device key management, smooth cross-chain transactions, and real time market data, packaged for both iOS and Android. I have experience with web3dart, bitcoin_flutter, flutter_secure_storage, and hardware-level protections on mobile, so seed phrases and private keys never leave the device and remain encrypted at rest with best-practice isolation. I’ll implement BIP39 wallet creation/import, per-chain account switching, balance fetching through reliable blockchain APIs, fee-adjustable transactions for BTC, ETH, LTC, and a modular structure so new chains and tokens can be added through clean service layers. Material 3 UI will keep the interface intuitive, while chain services, price feeds, and signing flows stay organized and extensible. Live price tracking will use CoinGecko or a similar provider, and the full project will ship with documented Dart code plus Android and iOS build outputs. You’ll also receive a concise setup guide covering signing logic, secure storage, API integrations, and build steps so your team can maintain and extend the wallet long term. Best, Justin
$1.000 USD em 15 dias
4,5
4,5

Hello there, I will build your cross-platform crypto wallet in Flutter, ensuring it is production-ready, secure, and easy to use. I have experience working with packages like web3dart, bitcoin_flutter, and flutter_secure_storage, and have implemented multi-chain wallets with on-device key storage and real-time price updates. Your users will be able to create or import a BIP-39 seed phrase, securely manage multiple accounts, and perform transactions safely across supported blockchains. My approach will include cross-chain sending and receiving, adjustable transaction fees, and live balance updates via APIs such as CoinGecko. I will create a clean and intuitive Flutter UI with Material 3 design principles, with optional Cupertino adjustments for iOS polish. The project will include fully documented Flutter/Dart source code, build-ready Android and iOS outputs, and a setup guide covering wallet logic, key encryption, and third-party API integration For future expansion, I suggest designing a modular architecture that allows adding new tokens or chains with minimal effort, and possibly integrating a flexible swapping engine. How many chains or tokens do you plan to support initially, and do you have preferred on/off-ramp providers for fiat transactions? Best regards, Aliza K.
$1.200 USD em 21 dias
3,9
3,9

Hello! As per your project post you are looking to build a full scale Flutter crypto wallet that supports multi chain assets, secure key handling, cross chain transfers, real time market data and a smooth Material three interface across iOS and Android. The goal is to deliver a production ready wallet where users can create or import seed phrases, manage assets across fifty plus chains and handle swaps, payments and on or off ramp flows inside one seamless app. My focus will be on delivering a complete wallet solution featuring secure BIP thirty nine onboarding and encrypted on device key storage, multi account handling for BTC ETH and LTC, balance and transaction fetching from each chain, cross chain sending and receiving, integrated swap flows, debit card payment options, live price tracking through CoinGecko or similar, clean Material three UI and smooth performance on both platforms. The platform will ensure reliable crypto operations, strong security practices and consistent cross platform design. I specialize in Flutter based fintech and crypto products, blockchain integrations, secure key management and real time data systems. My focus will be on building a stable and scalable wallet that gives users a clear and safe multi chain experience. Let us connect to discuss supported chains, preferred swap provider, on and off ramp partner options and the exact security model you want to follow. Best regards Nikita Gupta.
$1.200 USD em 7 dias
4,0
4,0

Hi, I have carefully read your complete description and I am genuinely interested in discussing the cross chain wallet you are planning to build. The flow you outlined for secure key creation, multi chain account handling, transaction execution and real time price tracking is clear and I am fully prepared to deliver a stable and production ready Flutter application. With more than seven years of experience in mobile development, secure storage patterns, blockchain integrations and clean interface design, I can confidently support your vision from the foundation to the final release. Seed phrase creation, encrypted key storage, multi asset views, smooth account switching, dependable transaction flow, live price monitoring. I would enjoy working together to shape this into a polished and safe product. Let us schedule a quick chat to align your vision and next steps. Best Regards, Prasham Jain
$767 USD em 17 dias
3,7
3,7

Hello didrikangell, I am Vishal Maharaj, with 20 years of experience in Objective C, iOS Development, Flutter, Android App Development, and Mobile App Development. I have carefully reviewed your project requirements for the Flutter-based Cross-Chain Wallet App. To ensure a successful project delivery, I plan to implement a secure on-device BIP-39 seed phrase creation/import process, multi-coin support across 50+ blockchains, real-time price tracking using CoinGecko API, and a user-friendly UI design following Flutter’s Material 3 guidelines with possible Cupertino styling for iOS. I will prioritize security by employing strong encryption for private keys and implementing best practices against mobile attack vectors. I am eager to discuss further details and initiate the chat to understand your vision and requirements better. Cheers, Vishal Maharaj
$1.500 USD em 10 dias
3,2
3,2

Good day! We are a team of 62 professionals with over 9 years of experience building secure, production-ready mobile apps, including crypto wallets with multi-chain support. Security, usability, and scalability are our priorities, and we have strong expertise with Flutter/Dart for cross-platform deployment. Here's how we can help: * Develop a full-featured crypto wallet supporting 50+ blockchains, including BTC, ETH, LTC, with secure on-device key storage and encrypted BIP-39 seed phrases * Enable seamless transactions, adjustable fees, and real-time price tracking via reliable APIs like CoinGecko, all within a clean Material 3 (or Cupertino-adapted) Flutter UI * Integrate on/off ramps, swapping functionality, and debit card payment flows while maintaining strong security best practices * Deliver clean, fully documented Flutter/Dart source code, build-ready Android (.aab) and iOS (.ipa/TestFlight) outputs, plus a setup guide detailing wallet creation, key management, API usage, and build procedures Could you clarify if you want native modules for each blockchain or a unified cross-chain transaction service? Also, are there specific third-party swap or payment providers you prefer, or should we suggest the most secure and reliable options? We’re ready to architect this wallet with modular, secure, and scalable design, ensuring a smooth user experience while protecting private keys and seed phrases at all times.
$1.125 USD em 7 dias
2,6
2,6

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