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Software Engineer, Elixir - Telephony

Brazil; Argentina; Texas

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.

The Opportunity

As an Elixir Telephony Engineer at Telnyx, you will create and deploy groundbreaking applications that are part of the Telnyx Telephony platform. Projects often start with a kickstart question and our Engineers lead the way in developing a solution, from high-level system design and prototyping to application development and data integration. As a Telnyx software engineer, you leverage everything around you: Telnyx products, open source technologies, and anything you and your team can build to drive real impact. 

AI-assisted engineering is an integral part of how we work. We actively use AI agents to accelerate software development, troubleshoot complex issues, and assist with deployments and operational workflows. We leverage our own Telnyx Inference product to power AI-driven engineering workflows, continuously exploring new ways to improve developer productivity, code quality, and operational efficiency.

You work with users around the globe, where you help our customers by solving their communications challenges. Each mission presents different challenges, from the regulatory environment to the nature of the data to the user population. You will work to accommodate all aspects of an environment to drive real technical outcomes.

You Will:

  • Design, build, and maintain APIs, services, and systems across Telnyx’s telephony engineering teams.
  • Work with engineers across the company to build new telephony features at large-scale.
  • Improve engineering standards, tooling, and processes.
  • Identify, optimize and resolve issues related to latency, scalability, and performance of core telephony infrastructure.

What We're Looking For

  • Have 2+ years of professional software development experience with the Elixir programming language.
  • Have deep knowledge of microservice architecture patterns and anti-patterns.
  • Understand the challenges inherent in concurrent and distributed programming.
  • You take a thoughtful approach to decision making, knowing when to move fast and when to long-term optimize.
  • You want to work in a fast-paced, product-driven environment.
  • You keep up to date with the latest technologies and patterns, and enjoy sharing what you’ve learned.

Bonus Points For

  • SIP and other VoIP related protocols and technologies like RTP, WebRTC, ICE, STUN, TURN
  • Consul, Docker, Kubernetes, Github Actions, Ansible, Grafana, Graylog, Prometheus

 

 

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We use Elixir and OTP extensively across our telephony platform. Understanding where you sit with OTP patterns, supervision trees, and the broader ecosystem helps us pitch the technical interview at the right level.

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Our telephony platform runs on a distributed, microservice-based architecture handling real-time traffic at scale. This question helps us understand how familiar you are with the kinds of systems you'd be working on — things like service communication, fault tolerance, and managing complexity across multiple services.

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We value engineers who take ownership of their work — from understanding the problem to shipping and supporting the solution. There's no wrong answer here; we're looking to understand where you are in your career so we can assess fit for the right level and set expectations for the interview process.

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s a fully remote team, clear communication is essential to how we work — from daily standups and code reviews to cross-team collaboration and incident response. We're not looking for perfection, just confidence in expressing technical ideas and participating in discussions. This helps us understand your comfort level and ensure we set you up for success.

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