This list contains only the countries for which job offers have been published in the selected language (e.g., in the French version, only job offers written in French are displayed, and in the English version, only those in English).
We are looking for a Senior Backend Engineer to join our growing engineering team. In this role, you will be responsible for designing, building, and maintaining scalable backend services that power our platform. You will work on real-time systems, optimize performance, and collaborate closely with product and engineering teams to deliver high-impact features. This is a hands-on role where you will influence architecture decisions and help shape best practices across the backend team.
Job Responsibility:
Backend Engineering: Design, implement, and maintain scalable backend services using Node.js (Express) and TypeScript
System Design: Own technical decisions, service boundaries, API design, and reliability patterns for backend components
Database Ownership: Design schemas, write and optimize SQL, and improve PostgreSQL performance (indexes, query plans, migrations)
Real-Time Functionality: Build and operate real-time features using WebSockets (socket.io), ensuring stability under load
Performance and Scalability: Improve throughput and latency, and proactively address bottlenecks across services and the database
Quality and Testing: Write and maintain unit and integration tests, raising overall engineering quality
Debugging and Incident Support: Troubleshoot complex production issues across the stack and implement long-term fixes
Collaboration: Work closely with product owners and engineering teams to deliver high-impact features with predictable execution
Continuous Improvement: Contribute to better tooling, standards, and engineering practices across the backend team
Requirements:
Proven experience as a Senior Backend Engineer (or backend-focused Full-Stack Engineer) delivering production systems at scale
Strong expertise in Node.js and Express with TypeScript
Strong proficiency in PostgreSQL, including schema design, migrations, data modeling, and query optimization
Hands-on experience with WebSockets and real-time systems (preferably socket.io)
Strong problem-solving skills and ability to work independently on ambiguous, complex tasks
Solid communication and collaboration skills in a fast-paced, cross-functional environment
Experience with CI/CD pipelines and DevOps practices
Nice to have:
Experience with React.js and state management (MobX is a plus) for occasional frontend contributions
Experience with crypto transactions
Familiarity with testing frameworks like Jest or Mocha