Senior Backend Developer

About the role

We are seeking a Senior Backend Developer to design, build, and maintain high-performance backend services for a fast-growing fintech platform that powers digital asset and blockchain applications used worldwide. The role involves collaborating with distributed engineering teams to deliver secure, scalable, and reliable APIs and microservices.

Key responsibilities

• Design, develop, and maintain backend services and APIs supporting financial and blockchain platforms.
• Enhance existing Node.js services to improve scalability, performance, and reliability.
• Create new microservices and integrate them across distributed systems using RPC and other communication methods.
• Write and optimise complex queries for operational, compliance, and financial reporting in MySQL and MongoDB.
• Implement strong security standards and best practices to protect platform integrity and user data.
• Contribute to high-availability architectures and ensure real-time responsiveness as the platform scales globally.
• Participate in troubleshooting, debugging, and continuous improvement initiatives.
• Support agile development processes and deliver innovative features.

Required profile

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

Required skills

• Node.js
• JavaScript
• Microservices architecture
• RPC communication
• MySQL
• MongoDB
• Backend security best practices
• High-availability and real-time systems
• Blockchain platform integration