Senior Backend Engineer (Remote)

About Telnyx Telnyx is an industry leader that's not just imagining the future of global connectivity—we're building it. From architecting and amplifying the reach of a private, global, multi-cloud IP network , to bringing hyperlocal edge technology right to your fingertips through intuitive APIs, we're shaping a new era of seamless interconnection between people, devices, and applications. We're driven by a desire to transform and modernize what's antiquated, automate the manual, and solve real-world problems through innovative connectivity solutions. As a testament to our success, we're proud to stand as a financially stable and profitable company. Our robust profitability allows us not only to invest in pioneering technologies but also to foster an environment of continuous learning and growth for our team. Our collective vision is a world where borderless connectivity fuels limitless innovation. By joining us, you can be part of laying the foundations for this interconnected future. We're currently seeking passionate individuals who are excited about the opportunity to contribute to an industry-shaping company while growing their own skills and careers. 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. What You’ll Do 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. You’d Be A Good Fit If You Have 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. Nice to Have Experience with WebRTC, VoIP, voice/video communications, or other real-time communication systems . Experience with WebSockets or other persistent connection technologies. Experience working with push notification infrastructure such as APNs or FCM . Experience with DNS, edge routing, service discovery, or globally distributed systems . Experience building internal diagnostic, observability, or troubleshooting tools. Experience building backend services that support mobile or JavaScript SDKs .