Senior Backend Developer

About the role

We are seeking an experienced Senior Backend Developer to design, build, and maintain high‑performance, secure financial technology services. You will work on scalable blockchain‑related platforms serving a global user base, collaborating with distributed engineering teams.

Key responsibilities

• Design, develop, and maintain backend services and APIs for financial and blockchain platforms.
• Enhance existing Node.js services for scalability, performance, and reliability.
• Create new microservices and integrate them across distributed systems using RPC and other methods.
• Write and optimise complex queries for operational, compliance, and financial reporting.
• Ensure backend systems follow strong security standards and best practices.
• Contribute to high‑availability architectures and real‑time service responsiveness.
• Participate in troubleshooting, debugging, and continuous improvement initiatives.
• Support agile development processes and deliver innovative platform features.

Required profile

• Minimum 5 years of professional experience with JavaScript and Node.js in backend development.
• Strong understanding of microservices architecture and distributed backend systems.
• Proven experience building complex, high‑scale platforms.
• Hands‑on experience with relational (MySQL) and NoSQL (MongoDB) databases.
• Good knowledge of backend security principles and secure API design.
• Ability to quickly learn and adapt to new technologies and tools.

Required skills

• JavaScript
• Node.js
• Microservices architecture
• Distributed systems
• MySQL
• MongoDB
• Backend security
• Secure API design
• High‑availability systems
• Real‑time services
• RPC integration