Senior Backend Engineer – Node.js

Description

We are looking for a highly technical **Senior Backend Engineer** to design, build, and scale robust, distributed, multi\-tenant backend systems in high\-performance production environments. This role is focused on real backend engineering, system architecture, and full ownership across the development lifecycle — from technical design to production deployment. You will work closely with Product, AI, and Platform teams to build scalable and resilient backend infrastructure capable of supporting real customers and large\-scale event\-driven systems. **What You’ll Build** ===================== * Production\-grade scalable REST APIs * Multi\-tenant architectures with secure data isolation * High\-availability distributed systems * Event\-driven and webhook\-based pipelines * Backend integrations with AI/ML services * Usage\-based billing and credit systems * Scalable backend infrastructure on AWS **Key Responsibilities** ======================== * Design and implement scalable backend services using Node.js and TypeScript * Build REST APIs consumed by external customers * Design secure multi\-tenant architectures with strong data isolation * Optimize PostgreSQL databases for scalability and performance * Implement reliable distributed systems: + retries + idempotency + dead\-letter queues + eventual consistency * Design caching, pub/sub, and distributed locking systems using Redis * Develop event\-driven architectures and webhook processing systems Collaborate with AI teams on Node.js* Python integrations * Participate in architecture, scalability, and observability decisions * Ensure reliability, security, and performance in production environments **Required Experience** ======================= * 6\+ years building backend applications with Node.js / TypeScript * Strong experience developing production\-grade backend systems * Advanced PostgreSQL knowledge: + schema design + query optimization + migrations + Row Level Security (RLS) * Advanced Redis experience: + caching + pub/sub + distributed locks + rate limiting * Experience designing externally consumed REST APIs * Experience with multi\-tenant SaaS architectures * Strong understanding of distributed systems and fault tolerance * Experience working with AWS: + ECS + RDS + SQS + S3 + ElastiCache * Ownership mentality and hands\-on execution **Technical Stack** =================== ### **Core Stack** * Node.js * TypeScript * PostgreSQL * Redis * AWS (ECS, RDS, SQS, S3, ElastiCache) * REST APIs ### **Integrations** * SendGrid * LinkedAPI.io * Unipile * Anthropic SDK * Stripe **Nice to Have** ================ * Experience building workflow engines or DAG execution systems * Usage\-based billing or metered credit systems * Large\-scale webhook\-driven architectures * AWS production operations experience Node.js* Python ML service integrations * Startup experience in small engineering teams * Multi\-tenant email reputation isolation * AI Agent Frameworks **What We’re Looking For** ========================== We are looking for backend engineers who think deeply about scalability, resilience, and real\-world system architecture. The ideal candidate understands how to build reliable production systems, manage distributed complexity, and take full technical ownership from design to deployment. **Important** ============= This role is NOT focused on basic CRUD development or API maintenance only. We are specifically looking for engineers with real experience building scalable distributed backend systems in production environments. **Why Join Us?** ================ * Opportunity to build high\-impact backend infrastructure * High technical ownership and architectural influence * Real scalability and distributed systems challenges * Highly technical and collaborative environment * Fast\-moving and innovation\-driven team