Blockchain Jobs

I’m looking to build a SaaS platform for jewellery and premium brands that gives every physical product a Digital Product Passport. A brand can register each jewellery piece/product on the platform and attach a unique QR code or NFC tag. When a customer scans it, they see a verified digital passport containing product details, authenticity/certificate information, warranty, and ownership history. The platform should also allow ownership transfers, so when a customer resells the jewellery, the digital ownership record can be transferred to the new buyer. Blockchain will be used as a tamper-evident verification layer for product registration, certificates, timestamps and ownership-transfer records, while sensitive customer/product data remains off-chain. MVP requirements * Brand/a...

I'm looking to develop a Solana token centered around luxury fashion and accessories. The token will not only serve as a currency for purchasing high-end items but will also offer holders discounts and special offers. Key Requirements: - Token Development on Solana - Integration of discount and offer functionalities - Secure and reliable proof of authenticity mechanism Ideal Skills and Experience: - Expertise in blockchain and Solana ecosystem - Smart contract development - Experience with luxury brand partnerships is a plus - Strong security background in crypto transactions Looking for freelancers who can create a secure, user-friendly token that enhances luxury shopping experiences.

I am ready to move from concept to code on a new cryptocurrency that will carry a fixed supply of 10 billion coins. The token must be created directly on the Deca blockchain, using its recommended tool-chain and security guidelines. The coin’s primary use case is identified internally as “I”. I will clarify the functional details and token-economics with you once we start, but the core idea is to make the asset immediately usable within my wider ecosystem and future DeFi modules. Here’s what I need from you: • A solid, audited smart-contract that mints the full 10 billion supply, handles transfers, burns, and all standard compliance events. • Deployment of that contract to Deca mainnet, plus a testnet version for validation. • A concise te...

I need an experienced blockchain developer to create a new cryptocurrency. Key Requirements: - Develop a secure and scalable cryptocurrency - Expertise in blockchain technology and cryptocurrency protocols - Knowledge of tokenomics and market trends - Experience with smart contracts and blockchain integration - Ability to provide ongoing support and updates Ideal Skills: - Proficiency in programming languages like Solidity, Python, or JavaScript - Strong understanding of cryptography and decentralized networks - Previous experience in launching successful cryptocurrencies Please provide examples of past work and relevant qualifications.

I have a live DeFi DApp running on Ethereum and I need thirty real Web3 users to put it through its paces. Each tester must connect a wallet, complete several buy-and-sell transactions, explore every screen, then tell me exactly where the experience shines and where it breaks down. Here’s how the process will run smoothly: • You secure thirty unique, verifiable users who are comfortable with Metamask (or any standard EVM wallet) and have a small amount of ETH for gas. • Every tester goes end-to-end: wallet connect → buy token → sell token → confirm settlement on-chain. • While moving through the app, they note UX friction, unexpected gas spikes, UI glitches, and any confusing language. Deliverables I need from you: 1. A consolidated bug log wi...

Tokenization - we are looking for a developer who is intimately familiar with the token mechanics of minting, supply, partial-failure recovery and settlement state machine, compensating transactions, financial state machines, idempotent settlement, payment reconciliation, saga-style workflows, exactly-once economic effects, or recoverable partial commits, Financial Limit Enforcement Under Concurrency, Failure Injection and Adversarial Testing etc. You get the idea... Please no fakeus or pretenders ... This is a significant project and we do not need additional complexity of unstable or dishonest people .... if you understand what we need and can demonstrate what you have done... we are all ears and happy to be accommodative.... No generic proposals will be considered. We are not purp...

I’m building a small-scale payment gateway that lets shoppers on my e-commerce site pay with TRX, Ethereum, BTC, XMR, and LTC. The focus is on a clean, dependable setup rather than heavy, enterprise-level security; standard encryption, confirmation checks, and basic anti-fraud routines will be enough for this first release. The gateway must handle both one-time and recurring payments. I’ll need simple merchant controls—think invoice generation, transaction status, and refund trigger—plus a lightweight REST or GraphQL API so my front-end can display QR codes, wallet addresses, and live confirmation counts without page reloads. Because I’m turning this into a standalone service for my own products, the codebase should be modular: a core processing service (No...

I’m compiling a knowledge pack on Web3 with an emphasis on blockchain technology, and the section still missing is a deep-dive into scalability. I want a clear, beginner-friendly yet technically accurate overview of today’s scalability approaches and how they intersect with Delegated Proof of Stake (DPoS) networks. Your task • Explain the core scalability challenges—throughput, latency, storage growth, and network bandwidth—in plain language. • Describe the main strategies used to overcome them (layer-1 optimisations, sharding, sidechains, roll-ups, etc.), then relate each strategy to DPoS systems such as EOS, TRON, or BNB Chain. • Detail how validator delegation, block production scheduling, and incentive design in DPoS influence performance a...

We are seeking an experienced blockchain/full-stack team to build , an institutional Real-World Asset tokenization platform focused initially on ultra-high-purity Copper Powder and high-purity Nickel Wire. The developer must deliver: public website, CMS/admin portal, industrial-metal registry, Digital Asset Passports, ERC-20 smart contracts, configurable tokenomics, institutional whitepaper, future Proof-of-Reserves and redemption modules, fully functional iOS and Android apps, testing, deployment, manuals, training and final handover. ReserveChain is in the Estonia pre-incorporation/prelaunch stage. Final company details, legal structure, token classification, token-holder rights, laboratory reports, ownership records, valuations, custody, insurance, reserve confirmations, offering term...