Senior Backend Engineer, Telnyx

• Strong professional experience building and operating backend systems in production
• Strong experience working with distributed systems and service-oriented architectures
• Experience with Elixir or Erlang, or strong backend engineering experience with the ability and willingness to ramp up quickly in Elixir
• Experience building or operating real-time, low-latency, or connection-oriented systems
• Strong understanding of backend fundamentals such as authentication, service communication, session lifecycle, reliability, and failure recovery
• Experience owning services throughout their lifecycle, including design, development, deployment, monitoring, troubleshooting, and scaling
• Experience with Kubernetes, containers, CI/CD, and modern production infrastructure
• A strong observability mindset, including experience with logging, metrics, dashboards, alerting, and root-cause analysis
• Good understanding of networking fundamentals and the ability to troubleshoot issues across software, networking, and infrastructure boundaries
• Strong communication skills and the ability to collaborate effectively with engineers working across different parts of the stack

Desirable

• We’re looking for a Senior Backend Engineer to join our WebRTC squad and help build, operate, and evolve the backend services behind our real-time communications and Voice SDK platform
• Our SDKs are supported by a number of backend services responsible for areas such as authentication and token management, push notifications, proxying, RTC DNS, and diagnostic logging. As these systems continue to grow, we’re looking for a dedicated backend engineer who can take ownership of these services and help improve their reliability, scalability, observability, and overall architecture
• You’ll work closely with our mobile and JavaScript SDK engineers, taking ownership of backend systems from design and implementation through deployment, monitoring, scaling, and production support
• This is a systems-focused backend role for someone who enjoys working on distributed production services, solving reliability problems, and understanding how applications, networks, and infrastructure interact in real-world communication systems
• Design, build, maintain, and operate backend services supporting our WebRTC and Voice SDK products
• Take ownership of backend systems including Voice SDK proxy services, authentication and token services, push notification services, RTC DNS, and diagnostic logging
• Improve the reliability, scalability, and maintainability of customer-facing backend services
• Improve connection setup, authentication flows, routing, and service behavior across real-time communication workloads
• Build and improve observability through logs, metrics, dashboards, alerts, and other operational tooling
• Improve visibility into push notification delivery and help make integrations with services such as APNs and FCM easier to monitor and troubleshoot
• Diagnose production issues across backend services, networking layers, and client connectivity
• Improve deployment processes, rollout safety, and production readiness for distributed services
• Turn recurring customer and operational issues into durable engineering improvements
• Collaborate closely with mobile, JavaScript, infrastructure, and other engineering teams to improve end-to-end reliability
• Help shape the architecture and technical direction of the backend systems supporting our WebRTC products