Member of Technical Staff, Backend Engineer, API

Job summary

Responsibilities

We're looking for an API engineer to join our core API team and help scale Runway's platform serving millions of users and handling thousands of requests per second. You'll work on the critical infrastructure that powers both our public API (used by external developers) and internal tools…

• Own the full API lifecycle from design and implementation to monitoring, optimization, and documentation for both public and internal APIs
• Design and implement async workflows for task orchestration, content moderation, prompt enhancement, and post-processing pipelines
• Optimize database queries and improve performance for a high-traffic Postgres database
• Build rate limiting, fraud detection, and credit management systems
• Implement comprehensive API security, rate limiting, authentication, and monitoring systems to ensure reliability at scale

What they're looking for

• 3+ years of industry experience building production APIs
• Strong TypeScript experience, so you can jump in and be productive immediately
• Experience owning systems end-to-end: infrastructure, monitoring, logging, metrics, incident response
• Understanding of API design patterns, REST principles, and async workflows
• Experience with relational databases (Postgres preferred) and query optimization

Tech stack

• TypeScript
• AWS
• Python
• PyTorch
• Kubernetes
• Terraform
• PostgreSQL
• GCP