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 75 countries.

We are currently looking for Senior Blockchain Developers for different projects.

Requirements – Senior Blockchain Developer with Web3.js/Ethereum/Ethers.js/Wagmi/Viem:

• 4+ years of software development experience.
• 3+ years of Ethereum/Web3.js/Ethers.js/Wagmi/Viem ecosystem expertise (required).
• Experience with React and Node.js, including at least 2 commercial projects.

Requirements – Senior Blockchain Developer with Solana:

• 4+ years of software development experience.
• 2+ years of expertise in Solana (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 a variety of projects, so if you have 4+ years of commercial software development experience and are proficient in AI Agent Architecture, AI Automation Architecture, AI Engineering, Site Reliability Engineering, Platform Engineering, React & Python, React & Golang, React & Java, React & Ruby, PHP & Vue, Vue & Node.js, React & .NET, Android & iOS, Blockchain (Web3/Solana), 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, Project Management, React Native & Node, Data Annotation, React & Node.js, Svelte & Python, Svelte & Node.js, Svelte & TypeScript, Rust, Shopify & JavaScript, Vue & Nuxt, PHP & Laravel, UI/UX Design, Animation, Graphic Design, Re…