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Dev Senior Blockchain Ai

$54k - $117k* · Senior Fully remote

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Dev Full Stack Senior Android

$48k - $110k · Senior Fully remote

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Senior Developer Blockchain

Lemon.io Canada, the U.S., LATAM, Europe, the U.K., Indonesia, Philippines, Australia, New Zealand, Papua New Guinea

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$54k - $117k · Senior Full-time Posted 5 months ago 4 min read

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 50 countries.

We are currently looking for Senior Software Developers for different projects. One of them is a Senior React & Node Developer with an understanding of blockchain principles; the other is for Senior Blockchain Developers.

Requirements – Senior React & Node Developer (GMT-5:00, Overlap: At least 4 hours overlapping with 9 AM–8 PM EST (US Eastern):

5+ years of experience as a Full‑Stack Software Engineer in production environments
5+ years of commercial experience with React and TypeScript
5+ years of expertise with Node.js
Experience refactoring complex codebases
Experience with AI tools for supercharging of the development or curiosity about AI trends, openness to learning with the team
Experience working with third‑party integrations and migrations
Skilled in investigating issues and applying fixes
Excellent problem‑solving abilities and strong communication skills
Self‑motivated, independent, and adept at remote collaboration
Understanding of blockchain principles is required, while hands-on exp. with blockchain ecosystems is a plus (nice-to-have).

Requirements – Senior Blockchain Developer:

4+ years of software development experience.
4+ years of commercial experience with React, React Native, Node, or Python.
3+ years of expertise with Smart Contracts, Solidity, Ethereum, Web3, or Ethers.js 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, 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. Just apply, and we’ll share more details with you.

Sounds good for you? Apply!

If your experience matches our requirements, be ready for the next steps:

VideoAsk — watch a short video about our startup, up to 10 minutes.
Complete your profile on our website.
30-minute screening call.
Technical interview.
Feedback.
Magic Box (we are looking for the best project for you).

P.S. We work with developers from 50+ countries in different regions: Europe, LATAM, Asia (Philippines, Indonesia), Oceania (Australia, New Zealand, Papua New Guinea), Canada, and the UK. However, we have some exceptions.

At the moment, we DON’T have a legal basis to accept applicants from the following countries:

European: 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.

Ready to apply? You'll go straight to the hiring team.

No agency in the middle · Your profile is shared privately.

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