Senior Blockchain Developer

Are you a talented Senior Developer looking for a remote job that lets you showcase your skills and earn competitive compensation? Look no further than Lemon.io — the marketplace that connects you with hand‑picked startups in the US and Europe. What we offer:

• The rate depends on your seniority level, skills and experience. We ve already paid out over $11M to our engineers.
• No more hunting for clients or negotiating rates — let us handle the business side of things so you can focus on what you do best.
• We ll manually find the best project for you according to your skills and preferences.
• Choose a schedule that works best for you. It s possible to communicate async or minimally overlap within team working hours.
• We respect your seniority so you can expect no micromanagement or screen trackers.
• Communicate directly with the clients. Most of them have technical backgrounds. Sounds good, yeah?
• We will support you from the time you submit the application throughout all cooperation stages.
• Most of our projects involve working in a fast-paced startup environment. We hope you like it as much as we do.
• Through our community, we will connect you with the best developers from more than 71 countries. We are currently looking for Senior Blockchain Developers for different projects. Requirements – Senior Blockchain Developer with Ethereum/Ethers/Web3:
• 4+ years of software development experience.
• 3+ years of Ethereum ecosystem expertise, Ethers.js, Viem, Wagmi or Web3.js (required).
• Experience with React and Node.js, including at least 2 commercial projects. Requirements – Senior Blockchain Developer with Solana/Solidity:
• 4+ years of software development experience.
• 2+ years of expertise in Solana or Solidity (required).
• Experience with Smart contracts is a must. Other requirements:
• Strong technical skills: as a Senior Developer, you are expected to be able to create projects from scratch and have a deep understanding of application architecture.
• Clear and effective communication in English — advanced ability to discuss business tasks, justify decisions, and communicate issues. Good self-presentation is also essential for upcoming client calls.
• Strong self-organizational skills — ability to work full-time remotely with no supervision.
• Reliability — we want to trust you and expect that you won t let us and the client down.
• Adaptability and Flexibility — the ability to onboard the project promptly after accepting it and start delivering results quickly. We have different projects for Senior Full-Stack Developers, so if you have 4+ years of commercial experience in software development and you are fluent with AI Agent Architect, AI Automation Architect, REact & Python, REact & Golang, React & Java, React & Ruby, PHP & Vue, Vue & Node.js, React & .NET, Android & iOS, Angular & Node.js, Vue & .NET, Python & Vue, DevOps with Azure DevOps, MLOps, Data Science, Angular & PHP, Angular &.NET, Symfony & React, Symfony & Vue, Symfony & Angular, Symfony & JavaScript & Next.js & TypeScript, Data Analysis, React & PHP, Data Engineering, AI Engineering, Data Annotation, React & Node, Svelte & Python, Svelte & Node, Svelte & TypeScript, Rust, Shopify & JavaScript, Vue & Nuxt, PHP & Laravel, .NET & C#, Unreal Engine & C++, Python & LLM, Unity, Machine Learning Engineering, we would be happy to communicate and provide you with a project that matches your experience. Just apply, and we will share more details with you. We do not provide visa assistance, and our cooperation model does not include the benefits typically offered with direct hire. P.S. We work with developers from 75+ countries across different regions: Europe, LATAM, the U.S. (if you have a completed W-9 form), Canada, Asia (Japan, Singapore, South Korea, the Philippines, Indonesia, Malaysia, Vietnam, Thailand, South Africa, and Israel), Oceania (Australia, New Zealand, and Papua New Guinea), Morocco, and the UK. However, there are some exceptions. At the moment, we don t have a legal basis to accept applicants from the following countries:
• European: Hungary, Iceland, Liechtenstein, Kosovo, Belarus, Russia, and Serbia.
• Latin America: Cuba and Nicaragua
• Most Asian countries and Africa. We expand and shorten the list of exemptions regularly.