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 an Elixir Engineer to join our WebRTC squad and take ownership of the backend services behind our real-time communications and Voice SDK platform.

Our SDKs are supported by a set of Elixir backend services covering authentication and token management, push notification delivery, connection proxying, routing, and diagnostic logging. These services carry customer-facing traffic and are growing fast. We're looking for a dedicated backend engineer who can own them — and who brings the distributed-systems judgement the squad needs when deciding how these services should be built.

You'll be the first dedicated backend engineer on this squad. You'll work closely with our mobile and JavaScript SDK engineers, and alongside Telnyx's wider Elixir community, owning backend systems from design and implementation through deployment, monitoring, scaling, and production support.

This is a systems-focused role for someone who enjoys distributed production services, reliability problems, and understanding how applications, networks, and infrastructure interact under real load.

What You'll Do

Design, build, and operate Elixir services supporting our real-time communications and Voice SDK products
Own the backend systems behind authentication and token issuance, push notification delivery, connection proxying, routing, and diagnostics
Improve the reliability, scalability, and maintainability of customer-facing services under sustained load
Strengthen connection setup, authentication flows, session handling, and service behaviour across real-time workloads
Build observability that makes production behaviour visible: structured logs, metrics, dashboards, alerts, and operational tooling
Improve visibility into push notification delivery so failures to APNs and FCM are traceable rather than silent
Diagnose production issues across application, networking, and client connectivity boundaries
Improve deployment processes, rollout safety, and production readiness for distributed services
Turn recurring customer and operational issues into durable engineering improvements
Set the technical direction for these services and help raise backend practice across the squad

You'd Be A Good Fit If You Have

Production experience with Elixir or Erlang — you've shipped and operated BEAM services, not just read about them. Comfort with OTP (GenServer, supervision trees, process design) and the Elixir ecosystem (Phoenix, Ecto, Telemetry)
Experience with high-load, high-throughput backend systems — and the judgement to tell a sound architectural decision from a plausible-looking one
Experience with persistent connections — WebSockets, Phoenix Channels, or similar connection-oriented systems, including session lifecycle, reconnection, and backpressure
Experience building or operating authentication, token, or session services
Strong experience with distributed systems and service-oriented architectures
Experience owning services through their whole lifecycle: design, deployment, monitoring, troubleshooting, and scaling
Experience with Kubernetes, containers, CI/CD, and modern production infrastructure
A strong observability mindset — logging, metrics, dashboards, alerting, and root-cause analysis
Good networking fundamentals and the ability to troubleshoot across software, networking, and infrastructure boundaries
Strong communication skills and the ability to work with engineers across different parts of the stack

Nice to Have

Experience 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 consumed by mobile or JavaScript SDKs
Familiarity with WebRTC, VoIP, or voice/video communications — useful context, but the backend work does not require it
Open-source contributions to the BEAM ecosystem

#REMOTE