Senior Backend Engineer (AWS, Node.js, TypeScript, PostgreSQL, Real-Time)

About the position

We are seeking a Senior Backend Engineer to take ownership of mission-critical backend systems that power real-time, high-throughput applications. In this role, you will design, build, and operate scalable services in a cloud-native AWS environment, with a strong focus on performance, reliability, and clean architecture. Responsibilities 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. Cloud & Infrastructure (AWS): Design, deploy, and operate backend services on AWS, leveraging managed services for scalability, reliability, and security. 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, infrastructure, and the database. Quality and Testing: Write and maintain unit and integration tests, and raise overall engineering quality. Debugging and Incident Support: Troubleshoot complex production issues across the stack and AWS infrastructure, 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 fullstack 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 ). Solid experience with AWS , including deploying and operating backend services using services such as EC2, ECS/EKS, RDS, S3, CloudWatch, and IAM. Understanding of cloud-native concepts such as scalability, high availability, observability, and security. 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 Infrastructure as Code (Terraform, CloudFormation, or CDK). 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. Experience working in Agile/Scrum teams.

Place of work