Älykkäät sopimukset Jobs

​"In a Zero-Trust DePIN environment, how do you ensure the 'Integrity of Result' from an untrusted provider? If the computation happens inside an AMD SEV-SNP enclave, how do you architect a 'Remote Attestation' flow that proves to the client the data was processed by the correct binary without exposing the client's raw input to the provider's OS?"

​"We are dealing with a real-time stream of 100,000 packets per second. If the user triggers a complex filter on a 10-million-record heap, how do you prevent Main Thread 'Jank' (frame drops) while maintaining a 60FPS UI? Specifically, how would you handle memory management to avoid Garbage Collection spikes?"

Im looking to create my own cryptocurrency on the solana blockchain. 5 minutes work 1 billion coins. As low price as possible. 0.000000001$ select all coins - transaction fees on/earn by transactions on. select all coins and release all coins

We have privacy-preserving 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 cann...

We are a privacy-focused Web3 project building on Solana, and we are looking for a skilled developer to work on smart contracts and SDK development. What you will do: Develop and maintain Solana smart contracts using Rust. Build and support SDKs for integrations with our platform. Collaborate with our team to ensure code quality, security, and privacy. Skills we are looking for: Strong experience with Rust and Solana development. Knowledge of blockchain architecture and best practices. Familiarity with smart contract development and testing. Optional: experience with JavaScript/TypeScript for SDK integration. What we value: Clear and proactive communication. Ability to work independently and deliver high-quality code. Interest in privacy-focused solutions and Web3 technology. ...

Our new platform, CritiQ, needs a suite of robust, reusable smart contracts. I already have the product vision, tokenomics draft, and high-level user flows; now I’m ready to turn that vision into audited code. Here’s what I expect from this engagement: • Architecture & specification – refine requirements with me and translate them into a concise technical spec. • Development – implement the contracts in Solidity using best-practice libraries such as OpenZeppelin, with comprehensive unit tests in Hardhat or Truffle. • Security & gas optimisation – apply industry-standard patterns, write clear modifiers, and run automated analysis (Slither, MythX, or similar) before handing the code over for an external audit. • Deployment &am...

I'm looking for an experienced developer to create a Web 3 video chat application for desktop. The platform should integrate multiple Web 3 technologies, including: - Blockchain - Cryptocurrency - Decentralized storage - Smart contracts - Video infrastructure Essential Features: - Secure login/authentication - End-to-end encryption Ideal Skills and Experience: - Proficiency in blockchain technology - Experience with cryptocurrency integration - Knowledge of decentralized storage solutions - Strong background in smart contracts - Expertise in video chat infrastructure development - Strong security practices in app development Please provide a portfolio showcasing similar projects.

Socifi, our real-time Texas Hold’em poker web app, already has the core game loop, React lobby and table UI, and working game logic. The missing piece is a solid back end that persists data and ties everything together. What needs doing right away • Re-enable and wire up MongoDB so user profiles, game states (hands, pots, blinds, results), and transaction/payment records are stored, queried, and indexed efficiently. • Patch the current authentication flow so sign-up, login, and token refresh are reliable across reconnects and multiple tabs. • Activate or complete the half-finished features in the existing codebase (e.g., player avatars, hand history modal, chip top-up) and remove unused remnants. • Prepare environment variables, seeding scripts, and pr...

Im looking to create my own cryptocurrency on the solana blockchain. 5 minutes work 1 billion coins. As low price as possible. 0.000000001$ select all coins - transaction fees on/earn by transactions on. select all coins and release all coins

Im looking to create my own cryptocurrency on the solana blockchain. 5 minutes work 1 billion coins. As low price as possible. 0.000000001$ select all coins - transaction fees on/earn by transactions on. select all coins and release all coins

1.-PROJECT TITLE (Short & Professional) Development of a Blockchain-Based Decentralized Authentication Prototype Integrated with SQL Server 2.-BULLET POINT VERSION (If it asks for key points) You can paste this in the bullet/summary section: Academic research prototype (not a full hospital system) Decentralized authentication using blockchain (smart contract) Integration with Microsoft SQL Server Medical records stored in SQL Server (not on blockchain) Blockchain used for authentication hash validation Architecture documentation required Basic performance observation (authentication response time) Conceptual alignment with GDPR and HIPAA (no legal certification required) Full source code and technical explanation required 3.-FULL DESCRIPTION (Complete Version to Post) Hel...

I have a nearly finished cryptocurrency payment gateway that lets online merchants accept TEXITcoin (TXC) and PUREmedal (PURE). The core smart-contract logic, checkout flow and database schema are already in place, and the stack is React on the front end with a Node.js back end. What I need now is an experienced full-stack Web3 developer who can tie up the loose ends, harden the code and get us to a production launch. Key gaps to close • Merchant dashboard polish – merchants must be able to generate API keys, configure webhooks, and choose between HD/xpub or static wallet addresses. • Checkout edge cases – customers see a payment address and live status updates; the status must stay accurate even on slow or re-orged blocks. • Reliable notifications –...

Product Overview P2P Crypto Marketplace for Digital Goods A decentralized, escrow-backed peer-to-peer marketplace enabling users to safely trade digital goods (subscriptions, gift cards, licenses, accounts) using cryptocurrency, launched as a Telegram Mini App for instant global reach. The platform eliminates trust issues in digital goods trading by combining KYC verification, smart-contract escrow, and multi-step trade validation. Core Value Proposition Trade digital goods globally with crypto—without trust, fraud, or delays. No chargebacks No middleman holding funds No long onboarding Built for crypto users, not adapted for them How It Works (Trade Flow) User Verification Telegram login (one-tap) Mandatory KYC (basic → advanced tiers) Wallet connection (EVM-comp...

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 already have...

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, toolin...

Product Overview P2P Crypto Marketplace for Digital Goods A decentralized, escrow-backed peer-to-peer marketplace enabling users to safely trade digital goods (subscriptions, gift cards, licenses, accounts) using cryptocurrency, launched as a Telegram Mini App for instant global reach. The platform eliminates trust issues in digital goods trading by combining KYC verification, smart-contract escrow, and multi-step trade validation. Core Value Proposition Trade digital goods globally with crypto—without trust, fraud, or delays. No chargebacks No middleman holding funds No long onboarding Built for crypto users, not adapted for them How It Works (Trade Flow) User Verification Telegram login (one-tap) Mandatory KYC (basic → advanced tiers) Wallet connection (EVM-comp...

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 already have...

Hi I will share the details with the shortlisted candidates. Thanks

Hi I will share the details with the shortlisted candidates. Thanks

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 to the s...

Position: Freelance Smart Contract / Blockchain Engineer Type: Contract / Freelance Location: 100% Remote Workload: Part-time or task-based Compensation: $60–$100/hour (or fixed-price per task) About the Project We are working on DeFi smart contract components, including 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 wi...

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 Acceptance criteria...

Hi I will share the details with the shortlisted candidates. thanks

Position: Freelance Smart Contract / Blockchain Engineer Type: Contract / Freelance Location: 100% Remote Workload: Part-time or task-based Compensation: $60–$100/hour (or fixed-price per task) About the Project We are working on DeFi smart contract components, including 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 wi...

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 usage. P...

Hi I will share the details with the shortlisted candidates. Thanks