Blockchain Wallet Backend & API

@OutsourceMan

⭐⭐⭐⭐⭐ To ensure the successful completion of your project, CnELIndia and Raman Ladhani can provide a tailored approach that meets all your requirements: Backend Development: Our team will design a scalable, efficient backend using PHP, C#, and JavaScript. We'll implement secure wallet functionalities, including balance checks, transaction history, and crypto transfers with on-chain confirmation. To guarantee speed and reliability, we'll integrate efficient queuing systems and retry mechanisms. API Development: We'll create a robust REST/JSON API (or GraphQL if needed), incorporating token-based authentication, rate-limiting, and input validation. Each endpoint will be fully documented in Swagger, ensuring seamless integration with your frontend. Administrator Console: A user-friendly control panel with granular user management, audit logs, system health monitoring, and real-time data flow. We'll ensure that every admin action is captured for compliance, and the Help/FAQ editor will be easy to update. Security & Deployment: We’ll implement role-based permissions, 2FA, and cold-wallet protocols, with automated backups. The system will be containerized using Docker/Kubernetes for easy deployment and scalability. Our team is committed to delivering high-quality code, comprehensive documentation, and a 30-day bug-fix period to ensure smooth operations.

@Julian29

Hello, I HAVE 9+ YEARS OF EXPERIENCE IN BLOCKCHAIN & FINTECH BACKEND DEVELOPMENT I can deliver a production-ready backend for your multi-currency wallet, complete with secure APIs, transaction processing, and a full-featured administrator console. Approach & Core Features: • Wallet Core: On-chain send/receive, real-time balances, transaction history, efficient queueing & retry logic for reliability • Public API: REST/JSON (or GraphQL), token-based authentication, rate limiting, input validation, up-to-date crypto exchange rates, fully documented in Swagger/Postman • Admin Panel: Granular user management, searchable audit logs, live node/system monitoring, and in-console Help/FAQ editor • Security: 2FA, role-based permissions, cold-wallet protocols, automated backups, containerised deployment (Docker/Kubernetes) Deliverables: • Fully tested backend source code • Database schema & migration files • API documentation (Swagger/Postman) • Admin console modules (wallet, users, audit, monitoring, help) • Docker/K8s setup scripts and instructions • Walkthrough session + 30-day post-launch bug-fix support I’ve built several blockchain wallet backends with secure multi-currency support, admin dashboards, and scalable API layers. We can continue in chat to review preferred node integration, multi-currency strategy, and monitoring requirements. Thanks & regards Julian

@abhisaini0188

Hello, Thank you so much for posting this opportunity. It sounds like a great fit, and I’d love to be part of it! I’ve worked on similar projects before, and I’m confident I can bring real value to your project. I’m passionate about what I do and always aim to deliver work that’s not only high-quality but also makes things easier and smoother for my clients. Feel free to take a quick look at my profile to see some of the work I’ve done in the past. If it feels like a good match, I’d be happy to chat further about your project and how I can help bring it to life. I’m available to get started right away and will give this project my full attention from day one. Let’s connect and see how we can make this a success together! Looking forward to hearing from you soon. With Regards! Abhishek Saini

@toriquldev123

Hello Dear! I write to introduce myself. I'm Engineer Toriqul Islam. I was born and grew up in Bangladesh. I speak and write in English like native people. I am a B.S.C. Engineer of Computer Science & Engineering. I completed my graduation from Rajshahi University of Engineering & Technology ( RUET). I love to work on Web Design & Development project. Web Design & development: I am a full-stack web developer with more than 10 years of experience. My design Approach is Always Modern and simple, which attracts people towards it. I have built websites for a wide variety of industries. I have worked with a lot of companies and built astonishing websites. All Clients have good reviews about me. Client Satisfaction is my first Priority. Technologies We Use: Custom Websites Development Using ======>Full Stack Development. 1. HTML5 2. CSS3 3. Bootstrap4 4. jQuery 5. JavaScript 6. Angular JS 7. React JS 8. Node JS 9. WordPress 10. PHP 11. Ruby on Rails 12. MYSQL 13. Laravel 14. .Net 15. CodeIgniter 16. React Native 17. SQL / MySQL 18. Mobile app development 19. Python 20. MongoDB What you'll get? • Fully Responsive Website on All Devices • Reusable Components • Quick response • Clean, tested and documented code • Completely met deadlines and requirements • Clear communication You are cordially welcome to discuss your project. Thank You! Best Regards, Toriqul Islam

@rbtech1984

Hello There!!! I understand you need a production-ready backend for a multi-currency blockchain wallet with a secure REST/GraphQL API and an admin console. Key requirements include real-time balances, on-chain transaction processing, granular user management, audit logs, live system monitoring, and hardened security with 2FA, role-based permissions, and cold-wallet protocols. Services 24*7 available for discussion(reply in a few hours) Ui & UX design with unlimited revisions Deployment Support Source code will be provided at the end of the project 90-days support for bug fixing With 9+ years experience in PHP, JavaScript, C#, blockchain, and containerized deployments (Docker/K8s), I’ve built secure financial and crypto platforms with high-performance APIs. I’ll ensure wallet actions return under 2 seconds, endpoints are fully documented, and admin logs capture every action for compliance. The system will be scalable, secure, and ready for production. Let’s connect to discuss timelines and get this wallet backend live efficiently! Warm Regards, Farhin B.

@trm66614

Hi there, Good afternoon I am Talha. I have read you project details i saw you need help with JavaScript, API Development, Blockchain, Docker, C# Programming, Software Architecture, PHP and Kubernetes 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

@devbaloni1983

Hello, Hope you're doing great! I am a PHP Developer who builds secure, fast, and business-focused web applications. I work with both custom PHP and frameworks, and always ensure that every project is optimized, scalable, and easy to maintain. What I Do 1. Custom web applications & business automation tools 2. API development and integration 3. Secure login, admin panels, and dashboard systems 4. High-speed, mobile-friendly websites 5. Migration, bug fixing, and performance upgrades Why Clients Prefer My Work 1. Clean folder structure & scalable architecture 2. Fully optimized and secure coding practices 3. Excellent communication & professional approac 4. Quick turnaround time with regular updates Ready to Start Share your requirements or preferred reference — I’ll analyze it and provide: 1. Best technical plan 2. Exact timeline 3. Budget estimate Looking forward to building something amazing for you!

@maximg10

⭐Hello, I’m ready to assist you right away!⭐ I believe I’d be a great fit for your project since I excel in crafting robust backend systems for multi-currency wallets. With a keen focus on speed and reliability, I ensure efficient queueing and retry logic to enhance user experience. My extensive experience in software architecture and API development uniquely qualifies me to build the production-ready backend engine you need. Regarding security, I implement 2FA, role-based permissions, and automated backups to fortify the system. I'd prioritize containerized deployment using Docker or Kubernetes for seamless environment setup. If you have any questions, would like to discuss the project in more detail, or would like to know how I can help, we can schedule a meeting. Thank you. Maxim

@kishanbwts

I see you need a solid backend to power a multi-currency crypto wallet that’s fast, reliable, and secure, plus an admin panel that truly helps you run the business. I’ve built similar systems where on-chain confirmation and queueing logic were critical to keep things smooth under heavy load. For the API, I suggest REST/JSON unless there’s a specific need for GraphQL flexibility, since REST keeps things straightforward for your front-end team. I’ll include token-based auth, rate limiting, and strict input validation, then fully document everything in Swagger so your developers can start integration right away. The admin panel will have real-time system monitoring with metrics like node health and pending jobs, plus searchable audit logs that capture every action as required. The Help/FAQ editor will be a simple interface so you can update content without code changes. For security, 2FA and role-based access will be enforced, and cold-wallet protocols plus automated backups will cover asset safety. I’ll containerize everything with Docker or Kubernetes, complete with setup instructions for easy staging and production deployment. Do you prefer cold wallet management integrated in the backend or handled externally? Also, are there preferred blockchain networks you want prioritized for transaction speed? I’m ready to map out milestones and start this build so your wallet backend is reliable and ready for launch.

@dataspro

Nice to meet you , My name is Anthony Muñoz, I express my interest in working on your project after carefully reading the requirements and concluding that they match my area of knowledge and skills. I am currently the lead engineer for the IT agency DSPro and I have more than 10 years of experience in the field. I have successfully completed a large number of similar jobs and I consider your project to be a challenge in which I would like to work and be able to make it a reality. Please feel free to contact me, it will be my pleasure to help you. I greatly appreciate the time provided and I remain attentive to any questions or concerns. Greetings

@mughiraaa

Hello, I have reviewed the details of your project. i can develop the backend using node.js with nestjs to structure the wallet engine, exposing a secure rest api documented through swagger for direct frontend integration. user authentication will use jwt with refresh tokens, rate limiting, and strict input validation, while crypto transactions will connect to blockchain nodes through web3 libraries with on chain confirmation tracking. balances and transaction history will be stored in postgresql with indexed queries for fast retrieval under two seconds on testnet. background jobs with bull and redis will manage queueing, retries, and exchange rate syncing from trusted market data providers. the admin console will be developed with react and connect to live metrics including node health, memory usage, and pending jobs, while every action is written to an immutable audit log. Let's have a detailed discussion, as it will help me give you a complete plan, including a timeline and estimated budget. I will share my portfolio in chat I look forward to hear from you. Thanks Best Regards, Mughira

@ivaylo8

Hello, I'm excited about the opportunity to develop a production-ready backend for your multi-currency wallet project. With your designed mobile and web front-ends in place, I’ll create a robust backend engine that prioritizes speed and reliability. The wallet core will ensure users can easily check balances, track transaction histories, and perform cryptocurrency transactions with on-chain confirmations. I will implement efficient queueing and retry logic to maintain performance under load. For the public API, I propose a REST/JSON structure with a secure user authentication process, live cryptocurrency exchange rates, and complete transaction processing capabilities. I will also ensure thorough input validation and implement rate-limiting while documenting the endpoints via Swagger, making integration seamless for your front-end team. The admin control panel will feature granular user management, audit logs, and system monitoring for real-time insights. Security is key, so I will implement 2FA, role-based access, and automated backups, along with containerized deployment scripts. I look forward to discussing timelines and milestones! Best regards, Ivaylo

@NEHABHAT92

With almost a decade worth of experience as an accomplished web developer with some experience in blockchain technology and the required skills in JavaScript, and PHP, I am confident that I am the right choice for this project. I understand the crucial need for a highly efficient and reliable backend in any wallet service, especially one as complex as a multi-currency system that requires real-time updates, user management, and comprehensive tracking mechanisms. My skills and expertise perfectly align with these needs. As a proponent of clean coding practices, I assure you of a well-designed back-end that fully supports the functionalities you outlined such as balance inquiries, transaction history tracking, secure authentication system using tokens among others. My experience has also allowed me to hone my abilities in employing containerized deployment using Docker and Kubernetes. Additionally, my proficiencies in setting up Swagger documentation tool fit perfectly in your requirement of documenting endpoints with such a tool. Above all, I will embrace your business vision by producing highly secure code complete with Automated backups. I'm eager to put these abilities to work for your multi-currency blockchain wallet backend project

@albertc1996

Hello, I hope you're doing great. Since you require on-chain confirmation and sub-two-second response times, will we be utilizing a third-party indexing service like Moralist or Alchemy to handle real-time event streaming, or do you prefer a custom-built listener connected directly to your own nodes? Also, for the cold-wallet protocols, are you looking for a manual multisig approval flow within the admin panel or an automated threshold signature scheme integration? I can certainly build this production-ready engine for you and have extensive experience developing secure, containerized blockchain backends using Node.js and Docker. My approach starts with architecting a robust queuing system for transaction broadcasting to ensure reliability, followed by the deployment of a comprehensive Swagger-documented API and a real-time monitoring dashboard for your administrative control.

@DigitalNightOwl8

Hey Mate , Good afternoon! I’ve carefully checked your requirements and really interested in this job. I’m full stack node.js developer working at large-scale apps as a lead developer with U.S. and European teams. I’m offering best quality and highest performance at lowest price. I can complete your project on time and your will experience great satisfaction with me. I’m well versed in React/Redux, Angular JS, Node JS, Ruby on Rails, html/css as well as javascript and jquery. I have rich experienced in JavaScript, Kubernetes, C# Programming, Docker, Software Architecture, PHP, API Development and Blockchain. For more information about me, please refer to my portfolios. I’m ready to discuss your project and start immediately. Looking forward to hearing you back and discussing all details.. Thank you for your attention

@ionstefanache1

Project Proposal: Multi-Currency Wallet Engine Tech Stack: PHP MySQL 8.0, Bootstrap 5 (Admin), Docker. 1. Core Features & Scope Wallet Engine: Real-time balance management, multi-currency support, and on-chain transaction synchronization with optimized queuing for retries. Public REST API: Secure authentication (JWT/OAuth2), live exchange rate integration, rate-limiting, and comprehensive input validation. Full Swagger/OpenAPI documentation. Admin Console (BS5): Management of users, real-time system monitoring (nodes/memory/jobs), searchable audit logs, and a built-in FAQ/Help editor. Security & DevOps: 2FA implementation, cold-wallet protocols, RBAC permissions, and Docker/K8s orchestration for instant deployment. 2. Deliverables Codebase: Clean PHP source code with PHPUnit tests. Database: Optimized MySQL schema & migrations. API Docs: Interactive Swagger UI & Postman Collection. Ops: Docker Compose / Kubernetes configurations. Support: Final walkthrough + 30-day bug-fix grace period. 3. Timeline & Costs (Estimated) Phase 1 (Architecture & API): 4-6 weeks. Phase 2 (Wallet Core & Admin): 4 weeks. Phase 3 (Testing & Deployment): 2 weeks. Estimated Budget: $15,000 – $35,000 (depending on the number of integrated blockchains). If agrtee this please let me know Thanks

@mobiwebsolutions

✋ Hi There!!! ✋ The Goal of the project:- Build a production-ready backend for a multi-currency blockchain wallet with secure API access and a fully functional administrator control panel. I have carefully read and understood your requirements and am confident I can deliver a reliable, secure, and high-performance backend that integrates seamlessly with your front-end platforms. I am the best fit for this project because I have extensive experience in blockchain development, API design, and admin panel architecture for financial applications. Key points matching your requirements: 1. Implement wallet core functionality including balances, transaction history, and on-chain send/receive with queueing and retry logic. 2. Build a secure REST/JSON API with token-based authentication, rate-limiting, and complete endpoint documentation. 3. Develop an admin panel with granular user management, audit logs, live monitoring, and help/FAQ editor. I provide database management, testing, full source code delivery, and containerized deployment scripts at project completion. I have 9+ years experience as a full stack developer and have successfully built blockchain wallet backends with multi-currency support and real-time admin monitoring. Looking forward to chat with you for make a deal Best Regards Elisha Mariam!

@VianRey1

It’s tough when you have beautiful front-ends ready but no robust engine to power them. Not having a reliable backend for your multi-currency wallet makes it impossible to launch or scale, and missing admin tools means you’re flying blind on user management and system health. You can expect a backend that delivers lightning-fast wallet actions, secure and fully documented APIs, and an admin console that lets you monitor everything in real time. First, I’ll build the wallet core with efficient queueing and on-chain confirmation. Next, I’ll set up a secure API layer and a Swagger-documented interface for your front-end team. Finally, I’ll create an admin panel with live monitoring, detailed audit logs, and a Help editor, all hardened with role-based permissions and 2FA. What’s your top priority for the admin panel when it comes to business operations?

@Mani7Meena

This is exactly the kind of backend system I build — secure, production-ready, and operationally practical. Proposed Stack • Node.js (NestJS) – structured, scalable architecture • PostgreSQL (ledger-safe relational model) • Redis + BullMQ – queueing, retries, async confirmations • Web3 / blockchain SDKs for on-chain interaction • Dockerized deployment (K8s-ready) • Swagger auto-generated API docs Wallet Core • Ledger-based balance engine (no derived balance risks) • On-chain TX monitoring with confirmation listeners • Retry-safe job queues • Sub-2s API response (testnet) • Multi-currency extensible architecture Public API • JWT auth + refresh tokens • Rate limiting + validation pipes • Exchange rate sync via trusted providers • Full Swagger + Postman collection Admin Console • RBAC + 2FA (TOTP) • Full audit trail (every admin action logged) • Real-time monitoring (queue depth, node health, memory) • Wallet/user management • CMS-style Help/FAQ editor Security • Cold wallet segregation model • Encrypted secrets management • Automated backups • Role-scoped permissions Includes unit tests, migrations, Docker configs, walkthrough, and 30-day post-delivery support. If you'd like, I can break this into milestone phases with cost mapping.