Budget: 2900 USD Deadline: 30 days
Hi, I am Blockchain Engineer with 10+ years of experience with a lot of technical expertise. I have an excellent experience. Let’s discuss the details?
Responsibilities
Design, develop, and optimize the architecture of core back-end systems, ensuring high concurrency, stability, and scalability.
Participate in Web3 feature development, including on-chain contract interactions, blockchain data storage, and retrieval.
Write, deploy, and maintain Solidity smart contracts, implementing business logic on Tron and other blockchain networks.
Collaborate closely with the front-end team to design and integrate APIs.
Handle casino-related API integrations, data processing, and security measures.
Develop and optimize systems for futures trading and cryptocurrency exchanges, ensuring security and operational stability.
Write high-quality, maintainable, and scalable code, and maintain related technical documentation.
Requirements
Proficient in Node.js, Go, or PHP, with a solid back-end development foundation.
Strong expertise in Web3 development, proficient in Solidity smart contract programming and optimization, with in-depth knowledge of Tron chain development.
Experience in Web3 wallet development is a plus.
Prior experience integrating casino APIs or developing gaming/betting systems is preferred.
Experience in futures trading or cryptocurrency exchange development is preferred.
Familiar with designing and optimizing systems for high concurrency and large-scale data, with knowledge of security best practices.
Strong sense of code quality, teamwork, and responsibility.
Nice-to-Haves
Open-source contributions or a portfolio of relevant work.
Familiarity with other major blockchains (Ethereum, BSC, Polygon, etc.) and cross-chain technologies.
Experience with DevOps, CI/CD, and containerized deployment.
Budget: 2900 USD Deadline: 30 days
Hi, I am Blockchain Engineer with 10+ years of experience with a lot of technical expertise. I have an excellent experience. Let’s discuss the details?
Budget: 3000 USD Deadline: 7 days
Hello! I have the necessary stack and am ready to get to work, we can discuss the details in private messages.
Budget: 3000 USD Deadline: 14 days
Good day. You have an interesting task. I have extensive experience in writing the backend part using Nodejs + MongoDB. I am adding examples of projects that have a backend part: Here is an example of a car rental and booking site with registration, login, and interactive logic: https://track-rental-auth-react-ts.vercel.app/ or this one (with backend): https://water-tracker.online/; As I mentioned separately in my review, I also write FRONTEND (but that requires separate time and payment). Message me privately and we will agree on everything.
Budget: 3000 USD Deadline: 31 days
Hello.
I am interested in your project. I am confident that I can deliver effective and high-quality work that meets your requirements and expectations. I have over 8 years of experience.
Budget: 3000 USD Deadline: 11 days
Hello!
I specialize in creating and supporting complex frontend projects with a focus on pixel-perfect layouts based on Figma, modular architecture, and high performance. Experience with Next.js, Tailwind CSS, Canvas, complex animations, and UI systems.
I can develop interactive graphics and visualizations from scratch, optimizing them for any devices. I am used to working closely with designers and backend developers to bring projects to perfection.
I am ready to apply my experience to make your product look and perform at the level of top solutions.
git: https://github.com/onyx144
Budget: 3000 USD Deadline: 30 days
Nodejs backend developer. Hosting server administrator. DevOps. Message me privately, we will discuss in more detail.
We're building a regulated real estate tokenization platform that converts institutional-grade properties into ERC-3643 security tokens with built-in ONCHAINID compliance. Our platform enables fractional ownership, secondary trading, and DeFi integration—making premium real estate investment accessible to everyone. I am looking for a talented blockchain $ smart contract developer. Tech Stack: - Blockchain: Solidity (ERC-3643 with ONCHAINID) on Arbitrum One, Hardhat - Backend: Node.js/TypeScript, Express, PostgreSQL, Redis - Frontend: React/TypeScript, ethers.js/wagmi, Tailwind - Infrastructure: AWS, Docker, GitHub Actions Blockchain Developer Responsibilities: - Design and deploy ERC-3643 smart contracts with compliance logic - Implement ONCHAINID identity and KYC whitelist integration - Coordinate external security audits and optimize gas usage - Build DeFi lending integrations (staking, yield, collateralization)
We need to connect a payment system to a high-risk site. The main requirements are the acceptance of fiat funds and the withdrawal of funds in cryptocurrency. Preferably no KYC. Only those who have had similar experience. Price is negotiable.
Tech Stack - React: Responsive and dynamic front-end development - Node.js: Robust backend operations - Web3: Multi-chain cryptocurrency integration - Solidity: Smart contract development Project Objective Develop a comprehensive multi-chain staking platform for a popular gaming ecosystem, enabling seamless cryptocurrency interactions, NFT marketplace integration, and enhanced user experience across multiple EVM-compatible blockchain networks. Whitepaper We've been more than just a mobile gaming studio; we are visionaries and innovators in the gaming world. Our team is formed by mobile gaming industry talents and passionate gamers, and is dedicated to pushing the boundaries of what's possible in mobile gaming. Our expertise focuses on hybridizing genres to create something truly unique which we adapt for transitioning Web2 gaming to Web3 gaming titles. From Racing RPGs to Action Strategy games, we are constantly experimenting and blending genres to offer new gaming experiences. Our games aren't just a form of entertainment; they're immersive journeys that engage, challenge, and captivate our players. We embody our mission to not merely entertain but to transport our audience into an extraordinary universe of interactive world within Web3 gaming. - Front-End Development - Back-End Development - Landing Page Redesign - Multi-Chain Integration - NFT Marketplace - Testing & Quality Assurance - Deployment & Maintenance
What needs to be done: conduct an independent expert consultation on the implementation of multisig wallets to protect the company's treasury funds, which operates with high-volume payment processing in USDT across three networks - TRON (TRC20), BNB Smart Chain (BEP20), and Ethereum (ERC20). Requirements: (1) review available market solutions and recommend the optimal one for our profile - a single custodial platform for all three networks or a combination of separate tools for EVM and TRON; (2) propose a signature architecture (e.g., 2-of-3), key distribution among roles, thresholds for quick/large payments; (3) provide recommendations for key storage (hardware wallets, HSM) and procedures in case of key loss or compromise. For whom: the team administering the company's treasury with a high volume of crypto transactions. Success criterion: a ready recommended architecture with a clear implementation plan. Requirements: practical experience in implementing multisig, specifically with TRON (not just EVM), experience with specific solutions (Safe/Gnosis, Fireblocks, BitGo, Cobo, or native TRON multisig), preferably with cases of previous implementations.