Software Engineer, Agents

About this role

Cartesia seeks a backend Software Engineer to build the distributed systems powering Line, their voice agents platform. You'll own the Go API and Python worker stack end-to-end, directly influencing latency, reliability, and the developer experience for production-grade voice agents.

What you'll do

• Build and operate distributed systems for voice agents including load balancing, worker management, and real-time media pipelines
• Take projects from design through production: architect, implement, deploy, monitor, and iterate
• Make architectural decisions on latency budgets, reliability targets, and scaling strategies with clear tradeoff analysis
• Define developer experience through APIs, observability tools, and evaluation frameworks
• Collaborate on spec writing and design reviews with technical and non-technical stakeholders

What they're looking for

• Distributed backend systems architecture and production experience
• Go and/or Python backend development
• Real-time media systems (WebRTC, SIP, RTP, low-latency audio)
• Cloud infrastructure and observability (Kubernetes, Docker, gRPC, OpenTelemetry)
• AI coding tools and staying current with AI frontier
• Strong communication and technical writing abilities
• Product thinking around platform work

Benefits

• Competitive base salary with equity package
• Fully covered medical, dental, and vision insurance for you and family
• Parental leave: 9 weeks paternity, 12 weeks maternity
• 401(k)
• Monthly commuter allowance
• Flexible PTO