Senior Backend Engineer - Real-Time WebRTC Platform

Telnyx; Amsterdam; On-site; EUR 90,000 - 130,000; Full time

Job summary

Telnyx seeks a Senior Backend Engineer for our WebRTC squad to build, operate, and evolve the backend services behind our real-time communications and Voice SDK platform. You’ll own backend systems from design through production, collaborating with mobile and JavaScript SDK engineers to ensure reliability, scalability, and observability.

Ideal candidates have strong experience in production-grade backend systems, distributed architectures, and a willingness to ramp up in Elixir or Erlang.

Qualifications

• Proven experience building and operating backend systems in production.
• Experience with distributed systems and service-oriented architectures.
• Experience with Elixir or Erlang, or strong backend skills with ability to ramp up quickly in Elixir.
• Experience building or operating real-time, low-latency systems.
• Strong understanding of authentication, service communication, session lifecycle, reliability and recovery.
• Experience owning services through design, development, deployment, monitoring and scaling.
• Experience with Kubernetes, containers, CI/CD and modern production infra.
• Strong observability mindset: logging, metrics, dashboards, alerts, RCA.

Responsibilities

• Design, build, maintain, and operate backend services supporting WebRTC and Voice SDK products.
• Own backend systems including proxy services, auth/token services, push notifications, DNS, diagnostics.
• Improve reliability, scalability, and maintainability of customer-facing services.
• Improve connection setup, authentication flows, routing, and service behavior for real-time workloads.
• Enhance observability with logs, metrics, dashboards, alerts, and tooling.
• Monitor and troubleshoot push notification delivery and integrations with APNs/FCM.
• Diagnose production issues across backend services, networks, and client connectivity.
• Improve deployment processes, rollout safety, and production readiness for distributed services.
• Translate recurring issues into durable engineering improvements.
• Collaborate with mobile, JS, and infra teams to improve end-to-end reliability.
• Help shape architecture and technical direction of backend systems.

Skills

Backend engineering

Distributed systems

Elixir/Erlang

Real-time systems

Observability

Networking fundamentals

Collaboration across teams

System design

Performance & reliability

Tools

Kubernetes

Docker

CI/CD

Logs/metrics tooling

Job description

Telnyx seeks a Senior Backend Engineer for our WebRTC squad to build, operate, and evolve the backend services behind our real-time communications and Voice SDK platform. You’ll own backend systems from design through production, collaborating with mobile and JavaScript SDK engineers to ensure reliability, scalability, and observability.

Ideal candidates have strong experience in production-grade backend systems, distributed architectures, and a willingness to ramp up in Elixir or Erlang.