Ethereum Jobs

Ich suche jemanden, der mir in klaren, leicht nachvollziehbaren Schritten zeigt, wie ich meine Krypto-Währungen – konkret Ethereum und den Token „4-Way-Mirror“ – sicher von meiner aktuellen Wallet auf eine zweite Wallet übertrage bzw. das ich ein Teil auszahlen kann. Das ist bereits vorhanden: • Voller Zugang zu beiden Wallets (Seeds / Private Keys liegen vor). • Desktop-Rechner mit gängigen Wallet-Clients und MetaMask. Darauf kommt es mir an: • Kurze Remote-Einweisung oder schriftliche Schritt-für-Schritt-Anleitung, wie der Transfer genau abläuft. • Hinweise zu Network-Fees, optimalen Gas-Einstellungen und nötigen Wartezeiten. - Kenntnisse zu BNB, Chain Netzwerk, Tausch in USDC oder € • ...

...auf dem Ethereum-Netzwerk aufbaut und ERC-20-Token unterstützt: Konzept für eine dezentrale Börse (DEX) auf Ethereum-Basis für ERC-20-Token 1. Vision und Zielgruppe Vision: Eine vollständig dezentrale, sichere und transparente Börse für den Handel mit ERC-20-Token, die auf dem Ethereum-Netzwerk basiert. Zielgruppe: Krypto-Enthusiasten, DeFi-Nutzer, Entwickler und Investoren, die die Vorteile dezentraler Finanzprodukte nutzen möchten. 2. Börsenmodell Dezentralisierung: Die Börse sollte vollständig auf Smart Contracts basieren, um den Handel ohne Vermittler zu ermöglichen. Kernfunktionalitäten: Direkter Handel von ERC-20-Token, Liquiditätspools, automatisierte Market Maker (AMM), Staking ...

...Vielzahl von Glücksspielen anbieten, die alle auf Kryptowährungen basieren. Nachfolgend sind die Hauptanforderungen aufgeführt: 1. **Benutzerregistrierung und -authentifizierung**: Benutzer sollten sich registrieren und anmelden können, um auf die verschiedenen Spiele zuzugreifen und ihre Gewinne zu verfolgen. 2. **Kryptowährungsintegration**: Die Website sollte Kryptowährungen wie Bitcoin, Ethereum und andere unterstützen, sowohl für Einzahlungen als auch Auszahlungen. 3. **Spiele**: Die Website sollte eine Auswahl an Glücksspielen bieten, darunter: - Bitcoin-Wetten - Krypto-Casino-Spiele wie Poker, Blackjack, Roulette usw. - Krypto-Slots - Sportwetten mit Kryptowährungen 4. **Zahlungsabwicklung**: Die Website sol...

...optimiert werden. Erfahrungen mit diesem Tool sind von Vorteil, notfalls lernt man es aber auch schnell kennen. Dein fertiger Artikel hat also einen guten Surfer SEO Score, ist fehlerfrei und ansprechend geschrieben sowie vollständig formatiert (Absätze, Fettungen, etc.). Das Volumen ist langfristig für ca. einen Text pro Woche geplant. Die Wortzahl wird stark von dem jeweiligen Thema abhängen. Bei Ethereum waren es 4.000 Wörter, für den Bitcoin sind vielleicht auch 6.000 Wörter möglich, bei unbekannteren Währungen werden es vielleicht nur 2.000 Wörter sein. Im Idealfall finde ich hier eine Autorin oder einen Autor, der dieses Volumen bis weit ins Jahr 2023 liefern kann. Wenn das für dich zu viel ist, kann ich auch zwei Per...

Bitcoin, Ethereum oder die Blockchain sind dir gängige Begriffe und interessieren dich sehr? Du investierst vielleicht selber sogar in Kryptowährungen? Du schreibst gerne Texte und bist in der Finanzwelt Zuhause? Dann bist du hier genau richtig, denn wir suchen dich. Über uns Wir von Kafe Rocks sind nicht nur „the lighthouse“ für seriöses Igaming, wir haben auch seit kurzen unser Portfolio und Expertise um die Krypto-Industrie erweitert. Unsere Webseiten gehören mittlerweile zu den Top-Adressen im Krypto-Bereich in Deutschland und wir dürfen monatlich über 350.000 organische Besucher auf unserer Seite begrüßen. Dabei ist es uns sehr wichtig qualitativ hochwertige Artikel anzubieten, denn schlechte Krypto-Seiten gibt es...

Design und Programmierung eines Crypto-Exchanges. Der Exchange soll neben einem Euro-Wallet folgende Coins unterstützen Bitcoin Ethereum BNB XRP Terra Cardano Solana Avalanche Dogecoin Polkadot Cronos Litecoin Monero Zusätzlich soll ein eigener auf Ethereum basierender Stablecoin eingeführt werden, so daß beim Tauschen immer als zwischenschritt in den Stablecoin gewechselt wird.

Ich benötige ein für ein NFT Plugin für Wordpress. Ich erstelle im Vorfeld mehre Unterseiten Wird eine dieser drei Seiten aufgerufen so erscheint ein Button mit Wallet verbinden (Metamask ist am wichtigsten). Verbindet sich der Besucher mit seiner Wallet, werden alle seine Ethereum-NFTs auf der Seite permanent in Form einer Galerie angezeigt. Ein ander Besucher kann sich dann nicht mehr auf dieser Seite verbinden, sondern bekommt nur die NFT-Galerie des zuvor verbunden Users angezeigt. Wenn es möglich ist soll sich die Galerie automatisch updaten, falls ein neuer NFT dazukommt oder einer verkauft wurde. Falls es nicht möglich ist soll ein Button angezeigt werden, mit dem der User dem die Galerie gehört, die angezeigten NFTS updaten

Wir möchten zur Unternehmensfinanzierung einen Coin auf ERC20 (Ethereum) Blockchain herausgeben. Wir suchen einen versierten Freelancer, der uns dabei unterstützt und vor allem dafür sorgt, daß der Coin auf einer oder mehreren der Top 5 Crypto-Exchanges gelistet wird.

...verwaltet. Ich erkläre Ihnen kurz das Prinzip: Durch das Aufladen mit Bitcoin/Ethereum kann man sich auf der Website virtuelle Counter Strike Skins kaufen. Diese schickt man dann in einen Jackpot, in dem mehrere Spieler ihre Skins reinschicken. Je nach dem wer mehr bzw. hochwertigere Skins in den Pot schickt hat eine höhere Chance zu gewinnen. Der Gewinner soll dann zufällig basierend auf den Prozenten und mit einem Ticketsystem ermittelt werden. Der Gewinner erhält fast alle Skins, die in den Pot reingeschickt wurden. Einen kleinen Teil von 5-10 % behält sich die Website Möchte er nun das gewonnene Auszahlen lassen, so verkauft er die Skins zurück an die Seite, wodurch er Balance erhält, welche er in Bitcoin/Ethereum auszahlen kann....

Ich suche einen Ethereum-Developer der Interesse an einer langfristiger Zusammenarbeit hat. Ziel der Partnerschaft ist der Aufbau eines Full-Service-Providers im Bereich ICO.

Web-Wallet und App für eigenen Ethereum-Coin erstellen Erstellen Sie uns, für unseren eigenen bereits vorhandenen Ethereum-Blockchain und Ethereum-Coin: 1. Eine modere Web-Wallet für Browser. Der User sollte den Benutzernamen und das Passwort selbst wählen können. Die Adressen sollten vom User selbst generiert werden können. 2. Eine Wallet-App für Android und IOS Das Web-Wallet und die Wallet-App sollte modern gestaltet (machen Sie uns verschieden Vorschläge) und einfach zu bedienen sein. Wir freuen uns auf Ihre Angebote.

Neues Thema: Ethereum

Hallo Andrew, vielen Dank für deine Arbeit. Das neue Thema wäre: Ethereum Anfänger

...patients). Implement authentication using a smart contract on a blockchain network. Store authentication hashes or validation logs on blockchain (no medical data on-chain). Store medical records exclusively in Microsoft SQL Server. Validate authentication via blockchain before granting access to SQL Server. Log authentication events for traceability. Technical Requirements Blockchain platform (Ethereum or similar test network) Smart contract implementation Backend (Node.js or Python preferred) Microsoft SQL Server integration Clear architecture diagram Documentation explaining authentication flow and integration strategy Deliverables Full source code Functional smart contract SQL Server database schema Architecture diagram Installation guide Technical documenta...

...minimum viable product therefore revolves around three pillars: 1. Real-time market data – tight latency on price feeds, order book depth and recent trades is essential. Whether you hook into existing exchange APIs, aggregate several sources, or build your own feed handler, the ticker and order book must update instantly without page refreshes. 2. Multi-currency support – at launch I want Bitcoin, Ethereum and at least three additional top-tier coins live, with the system architected so that adding new pairs later is straightforward. 3. Seamless order execution – limit, market and stop-limit orders with immediate feedback on fill status. A matching engine of your own design or a proven open-source core is fine as long as it can scale and pass a basic stress t...

...blockchain, DeFi, NFTs, and Web3 Cover breaking news and trending topics in the crypto space Conduct research and verify information from reliable sources Produce opinion pieces, explainers, and long-form analysis Maintain a consistent publishing schedule Optimize content for SEO Requirements Proven experience writing about / blockchain Strong understanding of: Bitcoin & Ethereum ecosystems DeFi protocols Layer 2 solutions Tokenomics Market analysis Ability to explain technical topics clearly Excellent English writing skills Fast turnaround time for news-based content Familiarity with SEO best practices Nice to Have Journalism background Experience working with crypto media outlets Understanding of on-cha...

... OKX Oracles: Pyth Network, CoinGecko (free tier), Chainlink feeds if accessible DEX/Aggregators: Uniswap (via DexScreener or subgraph), DeFi Llama API Bridge/Wrapped Tokens: WBTC (Ethereum), cbBTC (Base), BTC.b (Avalanche), tBTC, etc. — fetch via DeFi Llama or direct contract reads if possible Price Deviation & Latency Scanner Calculate percentage spreads/deviations between every pair of sources Measure and display API response latency for each source Highlight anomalies (e.g., >0.5% spread, high latency spikes) Pairwise comparison matrix/table (spread %, direction, suggested action like "Buy WBTC on Ethereum") Live Dashboard UI Modern, responsive, dark/light mode support (Tailwind CSS or similar preferred) Sections: CEX Prices, Oracle Prices, DE...

.../leaderboard Top 10 ranked by Views or Earnings Admin configurable ranking method /campaigns Lists all active campaigns. /earnings Shows: Pending earnings Eligible earnings Paid earnings 8. USDT Wallet Collection (Manual Payout Only) The bot does NOT need to track blockchain payments. It only needs to store wallet addresses. Command /add-usdt <wallet_address> Requirements Validate Ethereum format: Starts with 0x 42 characters Allow users to update anytime Store wallet address linked to Discord ID Confirm: “USDT wallet saved successfully.” Admin Access Admin must be able to: View wallet of a user Export wallets in Excel Export must include: Username Discord ID Total Earnings Wallet Address Payments will be handled manually outside t...

I’m planning to launch a new blockchain-based product and I need an experienced developer who can guide me from concept to main-net deployment. At this stage I’m flexible about the exact stack—Ethereum, Binance Smart Chain, Solana or another network—so I value someone who can weigh the trade-offs and recommend the best fit for scalability, fees, security, and time-to-market. The broad vision includes designing the core smart contracts, creating a native token, integrating a secure wallet flow, and building out any web or mobile front-end required for users to interact with the chain. I also want clear documentation and the test coverage needed for a smooth audit. Deliverables I’d like to see: • Technical roadmap outlining the chosen architecture,...

I already have a draft smart contract, but it needs a careful review and a few modifications before going live. Once the code is solid, I want it deployed on Ethereum (that is my first choice, though I’m open to discussing BSC or Polygon if you feel they offer clear advantages). After deployment, the contract must be fully integrated into my website so users can interact with it through MetaMask. A smooth, reliable Web3 flow is essential—wallet connection, transaction signing, on-chain confirmations, and any UI feedback should feel seamless and secure. The job breaks down into three main parts: • Audit, adjust, and finalise the existing contract code, then compile, test, and verify it on the chosen network. • Deploy the verified contract and wire it up t...

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...

Design The Role We are looking for a Full Stack Engineer to take full ownership of building a non-custodial crypto payment gateway for USDC on Ethereum. You will not just be "writing code" from a ticket; you will be responsible for the entire delivery, including infrastructure, security, database design, and the admin dashboard. You are effectively acting as the Founding Engineer/CTO for this build. You must be comfortable making architectural decisions, setting up CI/CD, and securing a financial application. The System A compliant, on-chain payment rail that: Generates unique, one-time deposit addresses for users (HD Wallets). Detects incoming USDC transactions (Chain Indexing). Sweeps funds to a central treasury using EIP-3009 (Gasless Permits) to minimize ETH us...

...industry-standard patterns, write clear modifiers, and run automated analysis (Slither, MythX, or similar) before handing the code over for an external audit. • Deployment & hand-off – provide scripts for testnets and mainnet, full documentation, and a walkthrough so my in-house engineers can integrate the contracts with our front-end. Although I haven’t finalised the exact chain, I’m open to Ethereum mainnet, Polygon, or BSC; advise me on cost, community reach, and tooling so we deploy where CritiQ gains the most traction. Acceptance criteria: 1. Contracts compile without warnings, achieve >95 % unit-test coverage, and pass static-analysis scans with zero critical issues. 2. Documentation explains each public interface, constructor parameter, ...

I am in the middle of financial-remedy proceedings and have been appointed to instruct a single joint expert. My ex-partner has disclosed a series of public keys and wallet addresses; however, I still need a clear, defensible picture of exactly how much cryptocurrency he currently holds and through how many wallets. The work centres on three core blockchains—Bitcoin, Ethereum and Ripple—but there may be additional tokens mixed in, so flexibility to widen the net is essential. I can supply every public key and wallet address already disclosed, and I can request anything else you identify as relevant. Your task is to trace those identifiers on-chain, calculate the present balances, and compile a concise report that can stand up to court scrutiny. Chain-analysis platform...

...Complete source code with clear installation/compilation instructions • Brief technical documentation outlining architecture, key-management method, and backup/restore logic • A short demo video or walkthrough proving send/receive, history display, and backup/restore work on mainnet or testnet Acceptance criteria • Wallet sends and receives transactions successfully on at least one EVM chain (Ethereum testnet is fine). • Transaction history populates within 10 sec of login on a typical 4G connection. • Backup restores the identical account and transaction list on a fresh install without data loss. • Code passes basic static analysis (no hard-coded private keys, secrets, or fatal vulnerabilities). Once these points are met, I’m rea...

...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 compliance or security considerations. – Once we lock the specs, you’ll build the smart contracts, write thorough unit and integration tests, and deploy to a testnet. – Finally, we’ll connect the contracts to a simple but polished front end, run a security review,...

...straightforward: a student signs up, uploads a certificate, and immediately receives an on-chain validation record that anyone can later cross-check online. I have half work done and pages are created Core functionality • Secure user registration and login with email or social auth • Certificate upload, automatic hashing, and immutably storing the hash on a blockchain network (Ethereum or any suitable L2 you recommend) • Instant on-screen validation result plus a shareable verification link • Admin dashboard where I can review submissions, view analytics, and revoke or re-issue hashes when needed Tech notes I’m open to React, , or similar for the front-end, and Node.js, Python (FastAPI), or comparable for the back-end. What matters most is ...

I want to launch a simple USDT Stable Coin and I want it live on any of the three major networks: BEP20 (Binance Smart Chain), ERC20 (Ethereum), and TRC20 (Tron). The token only needs the core Tether behaviour—holders must be able to transfer tokens and see their main & asset balance with standard calls, original Logo. If you already have experience shipping tokens on any of these networks and can complete the third quickly, let me know—speed and reliability matter more than extra features.

...straightforward: a student signs up, uploads a certificate, and immediately receives an on-chain validation record that anyone can later cross-check online. I have half work done and pages are created Core functionality • Secure user registration and login with email or social auth • Certificate upload, automatic hashing, and immutably storing the hash on a blockchain network (Ethereum or any suitable L2 you recommend) • Instant on-screen validation result plus a shareable verification link • Admin dashboard where I can review submissions, view analytics, and revoke or re-issue hashes when needed Tech notes I’m open to React, , or similar for the front-end, and Node.js, Python (FastAPI), or comparable for the back-end. What matters most is ...

I’m putting together a consumer-to-business payment gateway that runs entirely on Ethereum. The goal is for any online shop or SaaS platform to accept on-chain payments in ETH or ERC-20 tokens and receive instant confirmation through a simple API or Web3 hook, with built-in fraud checks before funds reach the merchant. Here’s the flow I have in mind: a shopper clicks “Pay with Crypto,” the gateway spins up a one-time smart-contract address, watches the chain for the deposit, runs fraud-detection logic (velocity limits, address reputation, 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 trigg...

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 ...

...monitor USDT on Ethereum. The core of the job is to stand up a private Ethereum node (Geth, Erigon, or another production-grade client you recommend), then layer on the components below: • Wallet creation & management ‑ Generate unlimited ERC-20-compatible addresses locally. ‑ Store keys only on my server; nothing ever leaves it. ‑ Simple CLI or lightweight web panel is fine as long as it’s secure and documented. • Transaction tracking ‑ Real-time detection of incoming USDT transfers to any generated address. ‑ Callback or webhook that posts the transaction hash, amount, sender, and block confirmation count. ‑ Dashboard or log view so I can audit activity at a glance. No exchange or cross-chain connections are needed; everythi...

I need Google Analytics 4 to register every meaningful moment a visitor interacts with our Ethereum-based wallet integration. The scope covers: • Wallet connections – I want separate events when a user connects successfully and when the attempt fails. • Transaction completions – log both payment-success and payment-failed states. • General wallet errors – surface any other connectivity issues as a distinct event so they do not disappear inside generic JavaScript error noise. You may hook into the existing Web3 provider ( is already on the page) or propose an alternative, but the final data must enter GA4 cleanly, ideally through Google Tag Manager for easy maintenance. Acceptance criteria – GA4 real-time debug view shows the five...

...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, and kicks off the...

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 ta...defense claims it was tampered with after seizure. ​The Solution: When evidence is collected, a cryptographic hash (SHA-256) of the file is generated and stored on a Blockchain. Every time the evidence is "checked 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: S...

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I’m building an e-commerce flow where every new order receives its own self-custody Ethereum deposit address. I need a small service that can: • Derive a fresh address from a master wallet (BIP-32/44 HD path preferred) each time my store’s API creates an order. • Secure those addresses behind multi-signature authentication so funds can only be moved with the required M-of-N signatures I specify. • Listen to the Ethereum blockchain in real time, detect incoming payments to any of the generated addresses, confirm once they reach my chosen block depth, and push a webhook or callback so my application can mark the order as paid. You’re free to use tools like , , or a light-client implementation in Node or Go; just keep everything non-custodi...

I need a unified workflow that collects my text documents, images, and videos, packages each bundle as on-chain 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 st...

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.

I need a unified workflow that collects my text documents, images, and videos, packages each bundle as on-chain 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 st...

Possiedo diverse criptovalute – Bitcoin, Ethereum, Binance e qualche altra alt-coin – e ho bisogno di estrapolare tutti i dati necessari per la DSU ISEE italiana. Dispongo già di bozze del quadro RW e del quadro RT, ma voglio che siano verificati, completati e resi pronti per la consegna al CAF o all’Agenzia delle Entrate. Cosa mi serve, in pratica: • Analisi di wallet ed exchange per ricostruire saldi e movimenti annuali • Calcolo del valore in euro di ogni asset al 31/12 (tassi di cambio ufficiali) • Compilazione o correzione di entrambi i quadri RW e RT, rispettando la normativa fiscale vigente • Un breve riepilogo metodologico che spieghi criteri di calcolo e fonti dei dati Ho già raccolto la maggior parte delle informa...

...protocols Implement Fireblocks-based custody and approval policies Monitor risk, exposure, and asset allocation Support audits, compliance, and reporting requirements Evaluate new blockchain networks and DeFi opportunities Required Qualifications 5+ years of institutional crypto asset management experience Hands-on experience with Fireblocks / BitGo / Copper Strong understanding of Bitcoin, Ethereum, L2s, and major blockchains Experience managing large crypto portfolios Ability to communicate technical concepts to business stakeholders Nice to Have CFA / FRM / crypto certifications Experience at crypto funds, exchanges, or custody providers Open-source, research, or thought leadership background Why Join Us Work on institutional-grade crypto infrastructure Compet...

...automation 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, Lar...

I’m building a decentralized application on the Ethereum network and 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 govern...

Hello I'm looking for an experienced crypto developer or blockchain expert who understands how to work with older (legacy) smart contracts, not new, easily deployable ones. The goal is to recreate or interact with older tokens, sometimes referred to as "flash contracts", to test or emulate tokens similar to USDT Flash (no LP) transferable without liquidation or liquidity pool and NFTs or tokens with embedded logos and attached hashes. Possibility of setting fixed-digit formatting (e.g., padded numeric display like 000 000 000 000 000). Example Tokens: Teller USD (USDT variant) 15-digit minimum (e.g. 000 000 000 000 000). BTCBR (BNB Chain) 24-digit minimum. Shiba Inu (BNB) 18-digit minimum. DAI (BNB). DAI (Fantom). NFT (BNB). XTM (BNB) with and without logo. 18-digit minim...

Hiring for Gold ID (Web3 Domain Name Service) on EVM Chain (Urgent 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). &...

Hiring for Gold ID (Web3 Domain Name Service) on EVM Chain (Urgent 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). &...

I need a prebuilt casino website equipped with a crypto payment gateway. The casino should include a variety of games such as Slots, Poker, Blackjack, color prediction, Ludo, and Aviator. For the crypto gateway integration, I require support for Bitcoin, Ethereum, Litecoin, and USDT. The design should maintain a simple and user-friendly style, ensuring seamless navigation and an engaging user experience. If you can deliver a solution that meets these specifications, I look forward to working with you.

...blockchain 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...

Description: • "I need an experienced blockchain developer to build a custom EVM-compatible chain (Fork)." • "Requirements: Setup Genesis Block, customize Chain ID, simple consensus setup (PoA), and deploy Block Explorer." • "Deliverable: Source code uploaded to my Private Github + Instruction Manual." • Keyword: ใส่คำว่า Geth, Go-Ethereum, Hyperledger Besu, Polygon Edge