---
title: 'Senior Backend Engineer (Remote) at Telnyx'
canonical: 'https://feeny.ai/job/senior-backend-engineer-remote-telnyx-dublin-gad5mhmcw36b'
type: 'job'
last_seen: '2026-09-12'
---

# Senior Backend Engineer (Remote) at Telnyx

- **Company:** Telnyx
- **Location:** Dublin, Ireland / Ho Chi Minh City, Vietnam / Bangalore, India / Warsaw, Poland / Amsterdam, Netherlands
- **Work type:** remote
- **Posted:** 2026-09-04
- **Last confirmed live:** 2026-09-12
- **Apply:** https://job-boards.greenhouse.io/telnyx54/jobs/7986157003

## Job description

## 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](https://telnyx.com/our-network), to bringing [hyperlocal edge](https://telnyx.com/resources/about-edge-connectivity) 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.

## About Telnyx

## Core Business
- **Primary industry**: Telecommunications / AI Infrastructure
- **Target customers**: B2B – developers, enterprises, and communications service providers building voice AI agents, programmable voice, messaging, and IoT solutions.
- **Mission or purpose**: To own the full stack from carrier network to AI inference so that customers can build real-time voice AI agents with no handoffs, no lag, and carrier-grade reliability.

## Products & Services
- **Voice AI Agents**: Carrier-native voice AI with bundled STT (speech-to-text), LLM inference, and TTS (text-to-speech) on a Tier-1 network. Priced at $0.05/min for the full bundle.
- **SIP Trunking**: Elastic SIP trunking for enterprise voice, outbound from $0.005/min, inbound from $0.0035/min.
- **Programmable Voice & Messaging (SMS/MMS)**: RESTful APIs for call control, conferencing, recording, and SMS/MMS from $0.004 per outbound message.
- **AI Inference**: Edge-deployed GPU inference for voice and text AI, with per-token pricing or x402 pay-per-call.
- **Wireless (Mobile IoT)**: Programmable eSIM and roaming for IoT devices.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed.
- **Key Metric**: Annual revenue estimated at $16.0M (LinkedIn); total funding raised $2.1M.
- **Notable Investors/Partners**: Not publicly disclosed (only 2 prior funding rounds mentioned, lead investors unknown).
- **Growth Signals**: Headcount grew 21.5% YoY to ~300 employees; 121 active job postings (monthly job postings +27.4%, quarterly +202.5%, yearly +830.8%); operates in 34 countries; customer base includes 14,000+ industry-leading companies (Alibaba, Neon Health, etc.).

## Competitive Advantages
- **Full-stack ownership**: Telnyx owns its carrier network (CLEC licenses, STIR/SHAKEN A-level) and co-locates GPU compute at the telco edge, bypassing the public internet for low-latency voice AI.
- **Single vendor for voice AI**: Bundles SIP, STT, LLM, and TTS – no need to stitch together multiple providers.
- **Compliance by default**: Holds HIPAA, SOC 2 Type II, GDPR, ISO 27001, and PCI DSS certifications; built-in programmatic compliance (10DLC/KYC).
- **Private global network**: Operates a private IP network across 40+ countries, ensuring deterministic routing and high-quality audio.

## Strategic Focus
- **Voice AI agents**: Deep investment in real-time conversational AI infrastructure, including machine-readable evaluation endpoints and benchmark tools for developers.
- **Global expansion**: Continues to add PoPs and data center locations (Amsterdam, Dublin, Warsaw, Bangalore, etc.) to reduce latency.
- **AI-native platform**: Building autonomous orchestration for agent-to-agent workflows and inference at the edge.

## Why Work Here
- **Work flexibility**: Remote-first with in-person options in Austin, Amsterdam, Dublin, and Warsaw. Many roles are fully remote.
- **Culture & perks**: Unlimited personal time off, healthcare benefits (US, UK, Ireland), 401(k) matching (US), equity, commuter benefits, free snacks/drinks in offices.
- **Growth opportunities**: Strong promotion policies with customized development tracks; apprenticeship programs; job training and conferences.
- **Engineering culture**: Heavy investment in Elixir, Python, and AI infrastructure; open-source contributions (GitHub, npm); collaborative teams across time zones.
- **Global team**: 300+ employees across 34 countries with a diverse, inclusive hiring approach.

## Sources
1. [Telnyx Official Website](https://telnyx.com/)
2. [Telnyx Careers Page](https://telnyx.com/careers)
3. [LinkedIn Company Profile](https://www.linkedin.com/company/telnyx)
4. [Built In Company Profile](https://builtin.com/company/telnyx)
5. [Greenhouse Job Board](https://job-boards.greenhouse.io/telnyx54)

## Other roles at Telnyx

- [Head of Technology Partnerships](https://feeny.ai/job/head-of-technology-partnerships-telnyx-new-york-k2yjcwgdy6ne) — New York, NY / San Francisco, CA
- [Forward Deployed Engineer, Hong Kong](https://feeny.ai/job/forward-deployed-engineer-hong-kong-telnyx-hong-kong-hqr8z0sve8sw) — Hong Kong
- [Forward Deployed Engineer, SEA](https://feeny.ai/job/forward-deployed-engineer-sea-telnyx-seoul-yrpwdp0r14kv) — Seoul, South Korea
- [Forward Deployed Engineer, Japan](https://feeny.ai/job/forward-deployed-engineer-japan-telnyx-tokyo-mtvv46h4026j) — Tokyo, Japan
- [Founding Account Executive, UKI](https://feeny.ai/job/founding-account-executive-uki-telnyx-london-c0sj34ejtbay) — London, United Kingdom
- [Founding Account Executive, Benelux](https://feeny.ai/job/founding-account-executive-benelux-telnyx-amsterdam-pre3qb0y2r0h) — Amsterdam, Netherlands
- [Founding Account Executive, DACH](https://feeny.ai/job/founding-account-executive-dach-telnyx-munich-80dhmkskx3jr) — Munich, Germany
- [Founding Account Executive, France/Nordics](https://feeny.ai/job/founding-account-executive-france-nordics-telnyx-paris-6rwfczb52vct) — Paris, France
- [Founding Account Executive, Poland/CZ](https://feeny.ai/job/founding-account-executive-poland-cz-telnyx-warsaw-sgdpsj62p0yp) — Warsaw, Poland
- [Founding Account Executive, Southern Europe](https://feeny.ai/job/founding-account-executive-southern-europe-telnyx-milan-s271e549wr2x) — Milan, Italy