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 systemsCollaborate 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**:
- 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 experienceNode.js
- Python ML service integrations
- Startup experience in small engineering teams
- 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.
**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

📌 Senior Backend Engineer - Node.js (Guadalajara)
🏢 CobaltoTalent
📍 Guadalajara