Senior Blockchain Developer

Lemon.io; Canada; Remote; CAD 120,000 - 160,000; Full time

Job summary

Lemon.io is seeking Senior Blockchain Developers for remote projects with US and European startups. You will engage in hands-on blockchain development using Web3.js, Ethereum, Solidity and related tools, while collaborating directly with clients and teams across time zones.

Requirements include 4+ years in software development, 3+ years in Ethereum/Web3 ecosystems, and strong React/Node.js experience on at least two commercial projects. Remote, full-time work with flexible hours is supported.

Qualifications

• 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.
• 4+ years of software development experience is required for Solidity/Smart Contracts track.

Skills

Web3.js

Ethereum

Ethers.js

Wagmi

Viem

Solidity

Smart contracts

Tools

React

Node.js

Python

Job description

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.

Requirements – Senior Blockchain Developer with Solidity:

• 4+ years of software development experience.
• 3+ years of expertise in 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 also have other projects for Senior Full‑Stack Developers with different requirements. So, if you have 4+ years of commercial experience in software development and are proficient in React & Python, React & Ruby, AI Engineering, Python & LLM, UI/UX Design, React & Node or WordPress & Figma, we d be happy to connect you with a project that suits your experience.

We do not provide visa assistance, and our cooperation model does not include the benefits typically offered with direct hire.

We work with developers from 75+ countries across Europe, Latin America, North America (the U.S. and Canada), selected countries in Asia (Japan, Singapore, South Korea, the Philippines, Indonesia, Malaysia, Vietnam, Thailand, and Israel), Oceania (Australia, NewZealand, and Papua New Guinea), and Africa (including Morocco and South Africa).