Help Shape the Future of Digital Ownership
At OnchainLabs, we’re building WalletTwo — the invisible, intuitive wallet infrastructure powering the next generation of digital customer experiences. From loyalty systems and proof-of-authenticity to digital product passports, our plug-and-play solutions let brands integrate blockchain-backed tools without needing to speak “blockchain.”
We’ve already helped companies like Denario, zai, and CrowdTransfer launch secure, branded wallets — now we’re scaling fast. And that’s where you come in.
Your Role
We’re looking for a Senior Full Stack Developer to join us in the heart of our product engine. You’ll work closely with our CTO and collaborate across our product, design, and blockchain teams to ensure a robust, secure, and scalable infrastructure.
You’ll help us:
• Develop and maintain our backend services and deployment pipelines
• Improve architecture, scalability, and performance across our stack
• Analyze systems and processes to identify and track areas for improvement
• Support the integration of APIs, SDKs, and 3rd party systems
• Enable developers across the team with well-structured CI/CD pipelines
• Drive documentation and transparency in all deployments
What We’re Looking For
• Proven experience as a backend or full stack developer
• Strong knowledge of modern backend frameworks (Node.js, Python, or similar)
• Experience with Docker, CI/CD, and infrastructure-as-code tools
• Familiarity with cloud platforms (AWS, GCP, or similar)
• Solid understanding of databases (SQL/NoSQL)
• Highly collaborative, proactive communicator (English is a must)
• Based in a European timezone
No need for prior blockchain dev experience — we’ve got experts for that. But curiosity about Web3 is always welcome.
Bonus Points If You
• Expertise in JavaScript is highly valued and central to our tech stack.
• Are located in or near Spain and can occasionally work hybrid with our local team
• Have experience with secure systems or fintech environments
• Enjoy taking ownership of dev processes and mentoring junior engineers
What You Get
• Modern, family-friendly flexibility — we believe great work happens when life works too
• 100% remote-first culture with optional hybrid setup if you are near our hub in Sanlúcar, Spain
• Join a mission-driven team building real-world products with visible impact
• Be part of a well-funded startup backed by CHF 5M and growing fast
• Work alongside highly skilled, kind people who care about product, not ego
Ready to redefine the digital customer experience with us?
Send us your LinkedIn, GitHub, or whatever you’re proud of — we’ll take it from there.
