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  • Senior Blockchain Developer
    Senior Blockchain Developer
    3 days ago
    $240000–$280000 yearly
    Full-time
    Manhattan, New York

    Senior Blockchain Developer Remote | Full-Time | $240,000–$280,000 USD Build the Future of Web3 Are you passionate about blockchain technology and excited by the opportunity to build products that can transform industries? We're looking for a Senior Blockchain Developer to join our growing team and help create next-generation solutions across Web3, digital assets, tokenized real estate, decentralized finance (DeFi), and smart contract infrastructure. This is more than just another engineering role. You'll have the opportunity to shape technical strategy, influence product direction, and work on innovative projects that push the boundaries of blockchain technology. If you're a builder, problem solver, and blockchain enthusiast who thrives in a fast-paced environment, we'd love to hear from you. Responsibilities • Design, develop, test, and deploy secure smart contracts on Ethereum and EVM-compatible blockchains., • Build and maintain scalable decentralized applications (dApps) and Web3 platforms., • Develop backend services, APIs, and blockchain integrations using Node.js and TypeScript., • Collaborate with product managers, designers, and engineers to deliver high-quality features and products., • Architect blockchain solutions that prioritize scalability, security, and performance., • Conduct code reviews and provide technical mentorship to junior and mid-level developers., • Integrate wallets, token standards, payment systems, and third-party blockchain services., • Monitor, troubleshoot, and optimize production blockchain applications., • Implement security best practices and participate in smart contract audits and risk assessments., • Improve development workflows, CI/CD pipelines, testing frameworks, and deployment processes., • Research emerging blockchain technologies and evaluate new tools, protocols, and frameworks., • Contribute to technical documentation, architecture planning, and engineering standards., • Participate in technical discussions and help drive long-term product and technology strategy., • Work closely with cross-functional teams to ensure successful product launches and ongoing improvements. Required Qualifications • 5+ years of professional software engineering experience., • 3+ years of hands-on blockchain development experience., • Strong expertise in Solidity and Ethereum smart contract development., • Experience building production-grade applications using React, TypeScript, and Node.js., • Strong understanding of blockchain architecture, decentralized systems, and Web3 technologies., • Experience with ethers.js, viem, wagmi, or similar Web3 libraries., • Knowledge of token standards including ERC-20, ERC-721, and ERC-1155., • Experience with REST APIs, GraphQL, databases, and cloud infrastructure., • Strong understanding of software design patterns and scalable architecture., • Excellent problem-solving, communication, and collaboration skills. Nice-to-Have Qualifications • Experience building DeFi, NFT, RWA, or tokenization platforms., • Familiarity with Layer 2 scaling solutions and cross-chain technologies., • Experience conducting or supporting smart contract security audits., • Knowledge of AWS, Docker, Kubernetes, and infrastructure automation., • Experience working in startups or high-growth technology companies., • Open-source contributions within the blockchain ecosystem.

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  • Software Engineer
    Software Engineer
    1 month ago
    $20–$30 hourly
    Full-time
    Hackensack

    About the Job As a Software Engineer specializing in React.js and TypeScript, you will be a key member of our engineering team, responsible for building modern, responsive, and user-friendly web applications. Your primary focus will be developing high-quality user interfaces that deliver exceptional user experiences while collaborating closely with backend developers, designers, and product managers. We are looking for someone who is passionate about clean code, performance optimization, and creating intuitive digital products using the latest frontend technologies. Responsibilities * Design and develop modern web applications using React.js, TypeScript, and JavaScript (ES6+) * Build reusable, maintainable, and scalable UI components * Translate UI/UX designs into high-quality, responsive interfaces * Collaborate with backend developers to integrate RESTful APIs and third-party services * Optimize applications for speed, accessibility, and cross-browser compatibility * Identify and resolve bugs, performance bottlenecks, and usability issues * Participate in code reviews, technical discussions, and sprint planning * Write clean, well-documented, and testable code following best practices * Stay up to date with emerging frontend technologies and contribute innovative ideas * Utilize AI-powered development tools to improve productivity and code quality Requirements * 3+ years of professional experience with React.js * Strong proficiency in TypeScript, JavaScript (ES6+), HTML5, and CSS3 * Experience with state management libraries such as Redux, Zustand, or Context API * Familiarity with RESTful APIs and asynchronous data handling * Experience using Git and collaborative development workflows * Understanding of responsive design and mobile-first development * Knowledge of frontend performance optimization techniques * Strong problem-solving and debugging skills * Ability to work effectively in a remote and collaborative environment * Good written and verbal English communication skills Nice to Have * Experience with Next.js * Familiarity with Tailwind CSS, Material UI, Ant Design, or similar UI frameworks * Experience with testing frameworks such as Jest, Vitest, or Cypress * Knowledge of GraphQL and WebSockets * Experience with Vite, Webpack, or other modern build tools * Familiarity with Docker and CI/CD pipelines * Experience working in SaaS, startup, or fast-growing technology companies * Bachelor's degree in Computer Science, Software Engineering, or a related field What We Offer * Competitive salary based on experience * Fully remote work environment * Flexible working hours * Opportunity to work with modern technologies and AI-assisted development tools * Professional growth through challenging international projects * Collaborative and supportive engineering culture * Long-term career development opportunities

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  • Remote Partnership Opportunity – Upwork Account Collaboration
    Remote Partnership Opportunity – Upwork Account Collaboration
    2 months ago
    Part-time
    Downtown Brooklyn, Brooklyn

    We are looking for reliable individuals in the United States who are interested in building a long-term remote income stream through a structured freelance partnership system. This is not a traditional hourly job. This is a professional collaboration model focused on growing freelance operations through platforms like Upwork. Our team specializes in: • Shopify Development, • WordPress Development, • MERN Stack Applications, • AI Integrations & Automation, • Full-Stack Web Development The operational side — including client acquisition, proposal writing, communication, and technical project delivery — is fully handled by our team. We are looking for serious long-term partners who can provide and maintain a stable Upwork account for collaboration purposes. Important Requirements To qualify, you must: • Be a U.S. citizen or permanent resident, • Have a valid U.S. government-issued ID, • Currently reside in the United States, • Own a laptop or desktop computer, • Be comfortable using remote-access software such as AnyDesk, • Have a stable internet connection, • Have strong and professional communication skills, • Be reliable, responsive, and professional, • Be interested in long-term remote collaboration Technical or development skills are NOT required. However, if you already have experience in areas such as web development, Shopify, WordPress, MERN stack, AI tools, or freelancing, that is considered a strong advantage. For operational consistency and account stability, work is performed through a secure and structured remote environment using approved remote-access tools. What We Handle Our team manages: • Daily job applications, • Proposal writing, • Client communication, • Technical project delivery, • Workflow optimization, • Account growth strategy, • Client relationship management Your Role As the account owner, your responsibilities are minimal: • Maintain ownership of the Upwork account, • Participate in verification/setup if required, • Occasionally approve important actions, • Join client calls if needed, • Withdraw earnings from Upwork You always maintain full ownership and visibility of your account. Revenue Structure • Partner Share: 30%, • Operations & Execution: 70% Payment flow: 1. Client pays through Upwork, 2. Funds arrive in your account, 3. Earnings are distributed based on agreement Everything is handled transparently and professionally. What Makes This Different Unlike random freelancing setups, this system is designed for: • Long-term growth, • Stable freelance income, • Professional execution, • Transparent collaboration, • Scalable operations The goal is to build: • Strong Upwork profiles, • Positive reviews, • Long-term client relationships, • Consistent monthly income Secure Remote Setup To ensure account stability and professionalism: • Work is performed through a controlled remote environment, • Consistent login and security practices are maintained, • Operations remain organized and transparent, • Dedicated business workflows are used The account owner always keeps full access and control. Projects We Handle Projects may include: • Shopify Stores, • WordPress Websites, • MERN Stack Applications, • API Integrations, • AI Automation Systems, • SaaS Dashboards, • Website Optimization To Apply Please send: • Your name, • Your state/location, • Whether you already have an Upwork account, • Your availability for a short introduction call Serious long-term applicants only.

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