Solidity Jobs
...effizienten Code. - Bleiben Sie über Branchentrends und -technologien auf dem Laufenden und verfolgen Sie aktiv Ihre persönliche Entwicklung und Verbesserung. Qualifikationen: - Kenntnisse in JavaScript/TypeScript mit praktischer Erfahrung in Frameworks wie React, Angular oder Nullstack. - Gute Kenntnisse in Node.js, , Apollo und dem gesamten JavaScript-Ökosystem. - Erfahrung mit EVMs, Solidity, Flow/Cadence, Solana/Metaplex und Rust ist ein Plus. - Vertrautheit mit Truffle, Hardhat, , und kontinuierlichen Integrationspraktiken. - Eine starke Begeisterung für Technologie, eine teamorientierte Denkweise und das Engagement für die Förderung einer positiven Teamatmosphäre. Warum Sie sich uns anschließen sollten - Engagieren Sie sich in ein...
Wir sind eine Gruppe von 85 Leuten die einen Scam aufdecken möchten . Da wir sehr viele Fakten schon haben fehlt uns noch das gewisse etwas, nämlich einen Experten der Smart Contracts gut lesen kann, so wie ein hohes blockchain verständnis hat, zB Transaktionen verfolgen usw. Falls Sie interesse haben melden Sie sich bei uns! Viele Menschen wären es Ihnen von Herzen Dankbar wen Sie sich zur verfügung stellen können. Bis bald.
...liquidity Automatically distribute winnings Operate without manual wallet intervention Manual Mode When automation is disabled, I must be able to: Manually select betting markets Manually execute arbitrage Manually allocate liquidity Manually trigger transactions Fully control each operational step Automation must be optional and toggleable at any time. Technical Requirements Advanced Solidity expertise DeFi protocol architecture experience Liquidity pool and AMM design knowledge Arbitrage execution logic Secure backend architecture (Railway compatible) Secure wallet generation and storage Coinbase integration compatibility Gas optimization Smart contract security best practices Security, speed, and reliability are critical. Deliverables Fully working smart...
...liquidity Automatically distribute winnings Operate without manual wallet intervention Manual Mode When automation is disabled, I must be able to: Manually select betting markets Manually execute arbitrage Manually allocate liquidity Manually trigger transactions Fully control each operational step Automation must be optional and toggleable at any time. Technical Requirements Advanced Solidity expertise DeFi protocol architecture experience Liquidity pool and AMM design knowledge Arbitrage execution logic Secure backend architecture (Railway compatible) Secure wallet generation and storage Coinbase integration compatibility Gas optimization Smart contract security best practices Security and sustainability are critical. Deliverables Fully working smart cont...
I need a seasoned blockchain developer to create a full-featured NFT marketplace that runs on Ethereum, Binance Smart Chain, and Polygon. The core flow is straightforward: mint, list, buy, or sell NFTs across the supported chains without leaving the platform. What I expect: • Smart contracts for minting and trading on each network, written in Solidity (or the most efficient language for that chain) and fully verified. • A web interface where users can: – Create an account via email/password, – Connect their preferred wallet when they’re ready to transact, – Mint new NFTs with custom metadata, – Instantly list or purchase items at fixed price. • Clean, well-documented code plus a brief deployment guid...
I’m read...reputation points, etc.) should settle on Ethereum using well-known ERC-20/721/1155 patterns so ownership is clear and portable. Wallet-based sign-in through MetaMask or WalletConnect must be smooth and gas usage optimised. Peer-to-peer trading or full decentralised identity can stay modular for later; my immediate focus is a polished, scalable social experience. Deliverables I expect: • Commented Solidity contracts, ready for verification • Front-end (React, or similar) already wired to the contracts • Basic admin/moderation dashboard • Deployment scripts, env samples, and a concise README Let me know if you have a live demo, the timeline for transferring the repository, and the level of hand-over support you provide for deploying to...
...committing funds. Behind the scenes I need an admin dashboard that lets me and my team handle day-to-day operations: create or edit property records, manage user accounts and KYC status, and monitor all on-chain and off-chain transactions in real time. Automated distribution logic should route rental income to token holders at preset intervals, with clear audit trails. Key deliverables • Solidity smart contract for token issuance, including attestation framework and payout/distribution methods, fully unit-tested and audit-ready • Responsive web portal integrated with the contract (React, or similar) covering registration, login, property search, and transaction analytics • Admin panel featuring user management, property management, and live transaction...
...run on a *single Ubuntu 22.04 instance* behind Nginx. --- ## Infrastructure You Will Set Up - *AWS RDS* — PostgreSQL 14 database (shared by all services) - *AWS S3* — Private bucket for CSV evidence file storage - *AWS EC2* — Ubuntu server, Nginx reverse proxy, systemd services, SSL via Let's Encrypt - *Polygon Amoy testnet* — Deploy a Solidity smart contract (, already written) using Remix IDE and MetaMask (no Solidity experience required — it is a one-click deploy) - *Hostinger* — Upload two pre-built React apps via FTP --- ## Credentials / Access We Will Provide - AWS Console login (scoped IAM user — EC2, RDS, S3 access only) - AWS S3 access key and secret (for pasting into .env files) - SMTP credentials for OTP em...
...run on a *single Ubuntu 22.04 instance* behind Nginx. --- ## Infrastructure You Will Set Up - *AWS RDS* — PostgreSQL 14 database (shared by all services) - *AWS S3* — Private bucket for CSV evidence file storage - *AWS EC2* — Ubuntu server, Nginx reverse proxy, systemd services, SSL via Let's Encrypt - *Polygon Amoy testnet* — Deploy a Solidity smart contract (, already written) using Remix IDE and MetaMask (no Solidity experience required — it is a one-click deploy) - *Hostinger* — Upload two pre-built React apps via FTP --- ## Credentials / Access We Will Provide - AWS Console login (scoped IAM user — EC2, RDS, S3 access only) - AWS S3 access key and secret (for pasting into .env files) - SMTP credentials for OTP em...
I need an experienced Solidity developer to design, test, and deploy production-ready smart contracts on the Ethereum mainnet. The core requirement is clean, secure contract logic that follows current best practices and is ready for public verification on Etherscan. Your work will cover the full contract lifecycle: architecture discussion with me, coding in Solidity, unit testing with Hardhat or Truffle, gas optimisation, and final deployment through a verified address. Clear, commented code and a brief deployment guide are essential so the contracts can be maintained or upgraded later without confusion. Deliverables: • Audited, optimised Solidity source files • Comprehensive unit tests with passing results • Deployment scripts and step-by-step ins...
...speed and cost efficiency. What I need now is pure development fire-power: someone who can architect and code production-ready smart contracts, design the cross-chain message flow, and stitch everything together on the L2 of choice (Optimistic or ZK rollups are both on the table). The work centres on three pillars—smart contract logic, cross-chain interoperability, and Layer-2 scaling solutions. Solidity (or Vyper), Hardhat/Foundry, EVM-compatible bridges, proof relayers, and gas-optimised patterns will be part of the daily toolbox. Familiarity with rollup frameworks like Optimism, Arbitrum, zkSync or Starknet is a major plus, as is experience with Cosmos SDK / IBC or Polkadot XCM for non-EVM routing. Current architecture diagrams, tokenomics specs, and a partial test sui...
...spin up an autonomous AI-powered trading agent. The agent trades their locked capital for 90 days, credits daily profit on-chain, and makes those profits withdrawable at any moment while the principal remains locked. All portfolio data, trade history and licence status must be visible in real-time through a clean, minimalistic dashboard with licence management at its core. What I need built: • Solidity smart-contracts that mint and manage the five licence types, lock user capital, distribute daily profit, and expose transparent on-chain metrics. • A lightweight Web3 front-end (React, or similar) that follows a minimalistic design language yet feels premium and modern. • A dashboard module focused on licence management but also showing live trading results an...
...with deep expertise in Monero (XMR) privacy coin. Key skills: Monero transaction handling (ring signatures, stealth addresses, RingCT), privacy features, secure transaction processing/obfuscation. Also strong knowledge of cryptocurrency payment gateways (integration, APIs, wallets, processing privacy coins like Monero or similar). Experience: 2-4 years in blockchain/privacy coins development (Solidity, Hyperledger, or Monero-related preferred). Work mode: remote/office work preferred, open to hybrid (occasional visits to Jaipur office if needed – travel expenses reimbursed). Compensation: 90,000 – 150,000 INR per month (or equivalent fixed project rate) + performance incentives for milestones. Strict NDA required before sharing full project specs – privac...
...incentives for meeting or beating milestones. In return, you’ll bring proven skill, reliability, and the agility to deliver in a compressed timeline. Project snapshot • Cybersecurity expert: harden the existing stack, conduct rapid risk assessments, deploy and tune SIEM rules, and leave behind clear remediation documentation. • Blockchain developer: integrate a lightweight chain component (Solidity / Hyperledger welcomed), implement smart-contract logic, and ensure seamless hand-off into staging. • BPO Manager: map current processes, spot inefficiencies, and roll out streamlined SOPs that mesh with the new tech layer. Acceptance criteria 1. Each workstream must reach its functional milestone within the agreed sprint window. 2. All artefacts pass a...
...smart contracts built on Inco Network (FHE-enabled blockchain) and need a thorough independent review before mainnet deployment. The main priorities are uncovering security vulnerabilities specific to encrypted state handling and verifying correct implementation of confidential computing patterns; gas optimization is secondary. Here is what we need from you: • Manual and automated analysis of Solidity source code using tools such as Slither, Foundry test suites, or similar — adapted for privacy-focused contract logic. • Testing of edge cases related to encrypted variables, access control for confidential data, and proper handling of FHE operations. • Verification that sensitive data remains encrypted throughout contract execution and cannot be leaked thro...
...contracts via ), multi-asset support (ETH, SOL, etc.), user accounts, API endpoints for external dApps Nice-to-Have / Future Phases Support for multiple assets (ETH/USD, SOL/USD, etc.) Historical charts (price + spread over time) using or Recharts Public API for developers to query your aggregated "best" price On-chain price push (become a mini-oracle yourself – requires Solidity dev) Multi-chain bridge monitoring expansion Budget & Timeline Expectations Please provide: Your estimated fixed price or hourly rate Timeline for MVP (dashboard + BTC monitoring) Any questions/clarifications about scope Examples of similar dashboards/tools you've built (especially crypto/DeFi related) Which parts of the stack you are strongest in I'm open to phased de...
...Global reach without app store restrictions This significantly reduces friction compared to web or native apps. Suggested Tech Architecture Frontend Telegram Mini App (WebApp API) React / WalletConnect / Telegram Wallet SDK Backend Node.js / Java Spring Boot REST + WebSocket for live trades Redis for trade state management Blockchain Layer EVM chain (Polygon / BSC / Arbitrum) Solidity-based escrow contracts Upgradeable contract pattern Compliance & KYC Third-party KYC provider Encrypted user identity storage Region-based compliance rules...
I’m ready to launch my own BEP-20 token on Binance Smart Chain and need a developer who can handle the full smart-contract build and deployment. The token must follow the standard BEP-20 specification and include a Minting function so I can expand the supply later when needed. Here’s what I expect from you: • Write a clean, well-commented Solidity contract (OpenZeppelin libraries preferred). • Configure minting so only the owner (my wallet) can call the function. • Deploy the contract to testnet first, then mainnet once I have verified everything. • Verify the source code on BscScan and hand over ownership. • Supply all source files plus a short read-me explaining contract variables, how to mint, and any safety considerations. I alrea...
...Global reach without app store restrictions This significantly reduces friction compared to web or native apps. Suggested Tech Architecture Frontend Telegram Mini App (WebApp API) React / WalletConnect / Telegram Wallet SDK Backend Node.js / Java Spring Boot REST + WebSocket for live trades Redis for trade state management Blockchain Layer EVM chain (Polygon / BSC / Arbitrum) Solidity-based escrow contracts Upgradeable contract pattern Compliance & KYC Third-party KYC provider Encrypted user identity storage Region-based compliance rules...
I’m ready to launch my own BEP-20 token on Binance Smart Chain and need a developer who can handle the full smart-contract build and deployment. The token must follow the standard BEP-20 specification and include a Minting function so I can expand the supply later when needed. Here’s what I expect from you: • Write a clean, well-commented Solidity contract (OpenZeppelin libraries preferred). • Configure minting so only the owner (my wallet) can call the function. • Deploy the contract to testnet first, then mainnet once I have verified everything. • Verify the source code on BscScan and hand over ownership. • Supply all source files plus a short read-me explaining contract variables, how to mint, and any safety considerations. I alrea...
...token implementations and protocol-level logic. Our focus is security, clarity, and real-world usability — not hype. We are building a long-term freelancer pool and looking for engineers who can deliver clean, well-structured Solidity code independently. What You’ll Do Design and implement secure smart contracts using Solidity Work with EVM-compatible chains Review and improve existing smart contract code Follow best practices for documentation, testing, and security Collaborate asynchronously with a small technical team Required Skills Strong experience with Solidity and the EVM Ability to architect and deploy production-ready smart contracts High attention to detail and security Ability to write clean, readable, well-documented code Comfor...
I need a brand-new ERC-20 smart contract built from scratch, then deployed to the Ethereum network. The token must include minting, burning, and pausable functionality, implemented with clean, upgrade-friendly Solidity code that follows current best practices (OpenZeppelin libraries, Hardhat or Foundry for testing). Please create, test, and deploy the contract, then hand over everything required for future maintenance. Deliverables • Verified Solidity source code with mint, burn, and pause modules • Full test suite covering core logic and edge cases • Deployment scripts and step-by-step notes (addresses, gas used, etherscan verification) • Final token address on Ethereum mainnet or a clearly documented test deployment if mainnet is postponed Accep...
...to validate technical depth, architecture thinking, and clean execution. Scope (1-Hour Deliverable) One of the following (or similar complexity): - Build a minimal FastAPI endpoint with proper validation and auth stub - Implement a small OpenAI-powered endpoint (structured output, clean prompt design) - Create a basic RAG-style retrieval flow with mock data - Deploy a simple smart contract (Solidity or Rust) with clear structure - Wire a React/ frontend to a clean backend endpoint Requirements - Clean, modular code - Secure implementation (input validation, edge cases handled) - Clear structure and comments where needed - Production mindset, not hacky scripts - Fast communication and decisive execution What We Value - Ownership and low coordination overhead - Pragmatic engine...
...token implementations and protocol-level logic. Our focus is security, clarity, and real-world usability — not hype. We are building a long-term freelancer pool and looking for engineers who can deliver clean, well-structured Solidity code independently. What You’ll Do Design and implement secure smart contracts using Solidity Work with EVM-compatible chains Review and improve existing smart contract code Follow best practices for documentation, testing, and security Collaborate asynchronously with a small technical team Required Skills Strong experience with Solidity and the EVM Ability to architect and deploy production-ready smart contracts High attention to detail and security Ability to write clean, readable, well-documented code Comfor...
I have an almost–finished Web3 application running on BNB Smart Chain and need an experienced engineer to wrap up the last mile. The heavy lifting is on the contract side, but a clean hand-in demands tight coupling with the existing React/TypeScript frontend. What still needs doing • Write production-ready smart contracts for a referral & level system, staking and vesting mechanics, a level-gated NFT mint, and the accompanying ATA utility token. • Deploy, test, and wire those contracts into the current codebase through Wagmi / connectors. • Guarantee seamless Metamask, WalletConnect, and Trust Wallet interaction, including clear transaction states and error handling. • Close out a handful of UI bugs, polish the UX, and verify that every on-chain
I have an almost–finished Web3 application running on BNB Smart Chain and need an experienced engineer to wrap up the last mile. The heavy lifting is on the contract side, but a clean hand-in demands tight coupling with the existing React/TypeScript frontend. What still needs doing • Write production-ready smart contracts for a referral & level system, staking and vesting mechanics, a level-gated NFT mint, and the accompanying ATA utility token. • Deploy, test, and wire those contracts into the current codebase through Wagmi / connectors. • Guarantee seamless Metamask, WalletConnect, and Trust Wallet interaction, including clear transaction states and error handling. • Close out a handful of UI bugs, polish the UX, and verify that every on-chain
...experienced blockchain developer to guide and build the entire solution with me. Because the project is still early-stage, I’m open on the specific chain, tech stack, and even the exact feature set—we’ll define those details together during an initial discovery call. What I do know is that the end product will rely on smart contracts, a dApp front end, and secure wallet interaction, so familiarity with Solidity or similar contract languages, , and modern front-end frameworks is essential. Here’s how I’d like to structure our collaboration: – First, a short technical workshop where you assess my concept, recommend an appropriate blockchain (Ethereum, BSC, Polkadot, or another you feel fits), outline the contract architecture, and flag any c...
... yet go beyond the basics by including three essential capabilities: easy transferability, an on-chain dividend-distribution function that lets me send BNB or BUSD to current holders, and a burn mechanism I alone can trigger when underlying gold is redeemed. Please write clean, well-commented Solidity, test it thoroughly with Hardhat or Truffle, and deploy first to the BSC testnet; after I confirm everything works, walk me through the mainnet deployment. Deliverables 1. Auditable BEP-721 Solidity contract with transferability, dividend payments, and burn controls implemented. 2. Unit tests proving each feature works end-to-end on the testnet. 3. Step-by-step deployment guide plus ownership-transfer instructions. 4. A concise README for future maintenance. The jo...
...basic AML heuristics), and then notifies the merchant’s backend via webhook or GraphQL subscription. Successful transactions should settle directly to the merchant’s wallet; failed or flagged payments must trigger a callback we can act on. I’m comfortable on the product side but need a Solidity/Web3 engineer who can deliver production-ready code, a lightweight Node.js or Python service that talks to the chain, and a small front-end demo so merchants can see it working end-to-end. Deliverables: • Audited Solidity smart contract(s) that handle consumer-to-business payments • Fraud-detection module integrated into the off-chain service • REST or GraphQL API with webhook callbacks for payment status • Minimal front-end demo and cle...
I am building a service that must accept one-time customer payments directly on a public blockchain. My preferred rail is Ethereum, so the core of the job is a production-ready smart-contract–plus–API stack that lets me generate unique payment addresses, confirm the transfer, and surface the confirmation back to my app in real time. Here’s what I need the finished package to do: • Solidity smart contract deployed on Ethereum mainnet (initially Kovan/Goerli for testing) that logs each payment, enforces one-time use, and emits an event my backend can listen to. • Lightweight Web3 interface or RESTful webhook that notifies my server once a transaction reaches a configurable confirmation depth. • Simple front-end snippet (HTML/JS) that shows the cli...
...whichever stack its engineers prefer. • Attack coverage baked into the dataset pipeline: the IDS must correctly classify Malware, Phishing, and DDoS patterns. Synthetic generation for edge cases is fine as long as the final validation shows clear detection rates for all three. • Smart-contract aggregator: the chain’s sole responsibility is aggregating model weights. I want a concise contract—Solidity for an Ethereum PoA test-network or chaincode for Hyperledger Fabric—that stores submissions, computes the federated average, and emits the new global state. No on-chain data other than floats and a small hash for versioning. • bridge: a lightweight Python client that listens for the latest global weights, injects them back into the local model, a...
Digital Chain of Custody for Forensic Evidence Concept: A system for police and legal teams to track digital evidence (logs, hard drive images, CCTV footage) without tampering. The Problem: In court, digital evidence is often dismissed because the defense claims it was tampered with after seizure. The Solution: When evidence is collected, a cryptographic hash (SHA-256) of the fil...out" or viewed by an officer, a transaction is recorded. If the file hash changes even by one bit, the Blockchain rejects it. Tech Stack: Frontend: React.js or Flutter. Blockchain: Ethereum (Sepolia Testnet) or Hyperledger Fabric (for private permissioned access). Storage: IPFS (InterPlanetary File System) to store the actual large files; Blockchain only stores the hash. Smart Contracts: Solidity...
... and IoT engineering. First, the AI-driven Smart Traffic System must ingest multi-sensor feeds, apply real-time reinforcement learning, and demonstrate measurable gains in a simulation such as SUMO—specifically a double-digit reduction in congestion and wait times across a 20-intersection grid. Second, the Blockchain Voting System needs an end-to-end verifiable ballot flow. I expect audited Solidity or Substrate contracts, mobile-friendly front-end, zero-knowledge vote secrecy, and a testnet demo with at least fifty dummy voters that passes a public audit script. Third, the Solar-Powered Smart Watering System will run on a low-power microcontroller (ESP32/Arduino acceptable), read soil and weather data, and autonomously schedule irrigation while managing a small photovol...
...quality our clients value most. Think of the quiet confidence you feel when you see brands such as SBI or HDFC; that same sense of stability, growth and reliability should come through here, only tailored to our own identity. The logo will be a combination mark: clean lettering for “DR Enterprises” paired with a subtle, memorable icon. I see squared or rectangular forms working well to communicate solidity, but I’m open to how you integrate them. Colour-wise, please explore refined blends of red, orange, yellow and pale green set against an ivory backdrop; I’d love to hear your reasoning on the exact palette you choose. What I expect from you: • 4-5 distinct concept directions (vector-based, created in Adobe Illustrator or equivalent) • Room ...
...logic and security best practices. • Build or integrate a Web3-enabled interface (React, Vue, or similar) so users can interact seamlessly. • Handle testnet deployment, iterative QA, and finally mainnet release, including clear documentation so I can maintain the codebase after hand-off. I’m open to your technical preferences as long as the stack fits smoothly with Binance Smart Chain (Solidity, Hardhat/Truffle, , MetaMask support, etc.). If you have examples of previous BSC projects, especially live DApps, please include them—seeing how you solved real-world challenges will help us hit the ground running. Timeline and milestones are flexible; what matters most is clean code, thorough testing, and a straightforward user experience. Let me know how ...
...metadata, and mints it as an NFT on Ethereum. The resulting token must permanently prove ownership, allow normal transfers, and embed a royalty mechanism. Alongside the minting process, I want a language model to process the same material—extract keywords, generate a concise summary, possibly produce embeddings—and write those insights back into the token’s metadata or a linked JSON file. Think Solidity (ERC-721 or ERC-1155 with OpenZeppelin), IPFS or Arweave for storage, plus a Python or Node script that calls GPT-4 / Llama via LangChain or similar. This person must also be familiar with setting up a blockchain and wallets. Specifically using AWS to start, but flexible on learing. Deliverables • Hyperledger smart contract with ownership, transferabil...
We are a Web3-focused product team building a modern, scalable NFT Marketplace on Polygon/Ethereum. Our goal is to transform an existing NFT marketplace into a production-ready, secure, and user-friendly platform using modern Web3 standards. The project already has: A working NFT Marketplace Smart contracts (Solidity) A + Tailwind frontend We are now entering the modernization phase to upgrade architecture, security, UX, and performance.
...metadata, and mints it as an NFT on Ethereum. The resulting token must permanently prove ownership, allow normal transfers, and embed a royalty mechanism. Alongside the minting process, I want a language model to process the same material—extract keywords, generate a concise summary, possibly produce embeddings—and write those insights back into the token’s metadata or a linked JSON file. Think Solidity (ERC-721 or ERC-1155 with OpenZeppelin), IPFS or Arweave for storage, plus a Python or Node script that calls GPT-4 / Llama via LangChain or similar. This person must also be familiar with setting up a blockchain and wallets. Specifically using AWS to start, but flexible on learing. Deliverables • Hyperledger smart contract with ownership, transferabil...
...workflows integrated with blockchain, backend, AI, and payments. • Backend automation triggered by blockchain events. • REST APIs with documentation. • AI model integration. • Payment gateway fully integrated. • Clean, production-ready source code. • Short technical documentation explaining system architecture and automation flows. ⸻ Skills Required • Blockchain Development (Ethereum, Solidity, Smart Contracts) • Web3 Integration (, ) • Automation & Workflow Orchestration (n8n) • Full-Stack Development (React.js, Node.js, , PHP, Laravel, Django) • Mobile App Development (Flutter) • AI Model Integration • API Development & Integration • Backend Development (Node.js, Python, Laravel) &bul...
...need an experienced Solidity developer to write, test, and deploy the core smart contract that will power the dApp. The contract must follow best practices for security and gas-efficiency and be ready for mainnet once we complete testing. You’ll start by defining the contract architecture with me, then move on to clean, well-commented Solidity code. I prefer a modern workflow—Hardhat or Truffle for compilation and testing, plus or for interaction scripts—but I’m open to alternatives if you have a strong preference. Unit tests that reach full branch coverage are essential, along with a brief technical write-up explaining the contract logic, deployment steps, and any upgrade or governance considerations. Deliverable • Audited, production-re...
...and include native token staking so holders can lock tokens and earn rewards. Key expectations • Develop and audit the BEP-20 smart contract with staking logic built in. • Configure total supply at exactly 100,000 tokens and deploy first on a BSC testnet, then on mainnet once we confirm functionality. • Provide clear deployment instructions, the verified contract address, and source code (Solidity). • Supply a brief README that explains how to initiate staking, unstake, and claim rewards through common wallets such as MetaMask or Trust Wallet. Nice to have but not mandatory • A lightweight web page or script that lets users stake and track rewards. • Guidance on adding the token to PancakeSwap. I will test the contract myself and will rele...
...project / Budget negotiable) Project Details: I am building my own blockchain called “EGoldChain” (an EVM-compatible fork derived from BSC/Polygon). I want to develop a domain name registration system similar to ENS (Ethereum Name Service), using the .gold suffix. Example: If a user registers the name nova, the system will generate as an NFT. --- Scope of Work Part 1: Smart Contract (Solidity) Deploy on EGoldChain (I will provide the RPC URL). 1. Core System: • Write contracts based on the ERC-721 (NFT) standard. • 1 domain name = 1 NFT. • Suffix: must always end with .gold. 1. Functions: • Register: Register new names (payment accepted in USDT, and USX in the future). • Renew: Extend domain registration (pricing based on number ...
...project / Budget negotiable) Project Details: I am building my own blockchain called “EGoldChain” (an EVM-compatible fork derived from BSC/Polygon). I want to develop a domain name registration system similar to ENS (Ethereum Name Service), using the .gold suffix. Example: If a user registers the name nova, the system will generate as an NFT. --- Scope of Work Part 1: Smart Contract (Solidity) Deploy on EGoldChain (I will provide the RPC URL). 1. Core System: • Write contracts based on the ERC-721 (NFT) standard. • 1 domain name = 1 NFT. • Suffix: must always end with .gold. 1. Functions: • Register: Register new names (payment accepted in USDT, and USX in the future). • Renew: Extend domain registration (pricing based on number ...
...events. • REST APIs with documentation. • AI model integration and data-driven functionality. • Payment Gateway integrated within the platform. • Clean, production-ready source code. • Short technical documentation explaining system architecture. -------------------------------------------------------------------------------------------- Skills Required • Blockchain Development (Ethereum, Solidity, Smart Contracts) • Web3 Integration (, ) • Full-Stack Development (React.js, Node.js, , PHP, Laravel, Django) • Mobile App Development (Flutter) • AI Model Integration • API Development & Integration • Backend Development (Node.js, Python, Laravel) • Frontend Development (React.js, JavaScript) • D...
...gateway, the transaction is written on-chain, and I receive an instantly checkable hash I can surface back to the user. Performance must remain within normal web-app latency, and the code needs to be clean enough for a future audit. When you reply, focus on the secure-transaction gateways you’ve built or maintained, any chains or libraries you know inside out (, , Hardhat, Truffle, Solidity, Golang, Rust, Hyperledger Fabric, etc.), and the challenges you solved around confirmations, gas optimisation, or key management. A concise outline of how you would approach this build will help me see whether your experience aligns with the project. Deliverables • Technical design and chain selection rationale • Smart contract or ledger code (if used) with tests • ...
I’m looking for someone who already understands the MEV game inside out and can turn that knowledge into a live, revenue-producing system. The scope spans both Ethereum and Solana, so you’ll be juggling Solidity, Rust, Flashbots, and Solana’s priority-fee mechanics in one coherent architecture. Core objectives • A single MEV bot that watches the mempool in real time, identifies opportunities, and automatically executes profitable front-running, arbitrage trading, and sandwich attacks. • On-chain components written in Solidity (for Ethereum) and Rust/Anchor (for Solana) that the bot can call to secure transactions, bundle them, and protect against re-ordering. • Robust monitoring, risk controls, and simple configuration so we can turn in...
...todas as funcionalidades de governança, compliance e listagem pré-configuradas. Requisitos Técnicos Obrigatórios 1. Blockchain Base - Utilizar Polygon PoS ou Polygon zkEVM (prioridade: zkEVM se viável). - Motivo: baixo custo, alta compatibilidade com Ethereum, suporte a exchanges e ferramentas de auditoria. 2. Smart Contract (ERC-20 Privado) O contrato inteligente deve ser desenvolvido em Solidity ≥0.8.20, usando OpenZeppelin Contracts como base, e conter: Funcionalidades obrigatórias: - Pausabilidade (`Pausable` + função `pause()`/`unpause()` restrita ao owner) - Whitelist (somente endereços autorizados podem transferir/comprar) - Minting controlado (apenas roles com permissão) - Supply total confi...
This task involves fixing a bug where blockchain transaction data is not displaying correctly on the web interface. The issue occurs after transactions are successfully recorded on the blockchain but fail to update on the UI. The fix will focus only on correcting the data fetch or rendering logic. No new features or redesigns are required. The work includes testing the fix to ensure transa...are successfully recorded on the blockchain but fail to update on the UI. The fix will focus only on correcting the data fetch or rendering logic. No new features or redesigns are required. The work includes testing the fix to ensure transactions display correctly after submission. Skills: JavaScript, React.js, Python, PHP, Artificial Intelligence, Typescript, Blockchain, Web Development, Rust, So...
...AirDrop coins for successful transactions, secure packaging, and uninterrupted delivery. Royalties: Automated royalty payments to Brands from every secondary sale. Technical Requirements (Note: Specific framework preferences like React or Node.js are not mentioned in the sources and should be verified based on your existing infrastructure preferences.) Smart Contract Development: Proficiency in Solidity (or similar) to handle NFT minting, ownership transfers, and royalty distributions. Web3 Integration: Experience connecting front-end interfaces with blockchain wallets and decentralized protocols. IoT/RFID Integration: Capability to develop or integrate systems that link physical RFID data to the digital ledger. E-commerce Backend: Robust architecture to handle high-value...
I’m about to launch an Ethereum-based DApp with its own native token and I need a thorough third-party review before we touch mainnet. The Solidity code is functionally complete; my primary concern is rooting out security vulnerabilities, then tightening optimisation and style where it makes sense. What I need from you • A full manual + automated security audit of all smart contracts using tools such as MythX, Slither, Echidna, or your preferred stack, followed by line-by-line human review for logic flaws. • A clear report that ranks every issue by severity, explains the exploit path, and supplies concrete, actionable fixes (bonus points for proof-of-concept tests). • Verification that the token contract complies with ERC-20: supply cap, mint/burn control...
