Middle/Senior Blockchain Backend Developer

Join the Blockchain Backend Infrastructure team at Qubit Labs to build and maintain a leading blockchain management platform. You'll be responsible for building cutting-edge blockchain infrastructure and implementing high-throughput, real-time scalable software solutions. As a Blockchain Engineer, you'll be instrumental in researching and integrating blockchain technologies into the platform, serving as a technical bridge between raw on-chain capabilities and wallet features delivered to customers.

What you'll do

• Implement modern backend applications and infrastructure in a microservices architecture using the latest technologies and development practices
• Deep dive into the latest blockchain technology and become an expert in the fundamentals, protocols, and features of the chains you support
• Collaborate effectively with developers, engineers, and other roles while demonstrating strong independent problem-solving abilities
• Contribute to production reliability through on-call participation, incident response, and post-incident follow-ups

What you bring

• 5+ years of backend development experience in modern languages such as Go, Python, or JavaScript/TypeScript
• 3+ years of hands-on blockchain development experience
• Experience working on high-scale distributed systems
• Understanding of microservices architecture and API design
• Knowledge of consensus mechanisms, cryptographic primitives, and distributed systems
• Strong problem-solving skills, attention to detail, and a collaborative mindset

Nice to have

• Experience building blockchain solutions for enterprise or institutional use cases
• Understanding of security best practices for smart contracts and blockchain systems
• Demonstrated ability to apply AI tools in day-to-day development
• Understanding of MPC, multi-signature wallets, or other advanced cryptographic techniques
• Bachelor's degree in Computer Science, Engineering, or a related field
• Experience with Docker, Kubernetes, and Helm

Location

EU preferred, or availability to travel to one of the development hubs in Europe once per quarter.