Senior Backend Developer

About the role

We are seeking a Senior Backend Developer to design, build, and maintain high‑performance backend services for a global fintech platform. You will work on scalable, secure, and reliable solutions that power digital asset and blockchain applications used by a worldwide user base.

Key responsibilities

• Design, develop, and maintain backend services and APIs for financial and blockchain platforms.
• Collaborate with product, design, and engineering teams to translate requirements into efficient architectures.
• Improve existing Node.js services for 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.
• Enforce strong security standards and best practices to protect data and platform integrity.
• Contribute to high‑availability and real‑time service architectures as the platform scales globally.
• Participate in troubleshooting, debugging, and continuous improvement initiatives.

Required profile

• Minimum 5 years of professional experience with JavaScript and Node.js in backend development.
• Strong understanding of microservices architecture and distributed 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 new technologies and adapt to evolving environments.

Required skills

• JavaScript
• Node.js
• Microservices architecture
• RPC communication
• MySQL
• MongoDB
• Backend security
• High‑availability systems
• Real‑time services