Software engineer, backend

Ljubljana, Slovenia

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About the role

Soniox is building the future of speech AI — real-time transcription, translation, and reasoning across 60+ languages, delivered through a single, low-latency API. As we scale rapidly, we're looking for experienced engineers who love solving deep technical problems and building world-class infrastructure.

You’ll work in a fast-moving, collaborative environment where we ship often, optimize relentlessly, and care deeply about reliability. Our technology powers real-time voice interfaces, multilingual communication, and next-generation AI products used by developers around the world.

In this role, you will:

  • Design and build core systems that power Soniox's real-time speech AI platform, with a focus on scalability, performance, and security.
  • Collaborate with engineers, researchers, and product teams to bring new speech capabilities to market — and push the boundaries of what’s possible in real-time voice AI.
  • Develop internal tools and infrastructure that boost engineering velocity and system robustness.
  • Own the full lifecycle of your work — from design to deployment to on-call operations — with a strong sense of responsibility and autonomy.

You might thrive at Soniox if you:

  • Have built and scaled production systems, ideally involving real-time data, distributed infrastructure, or machine learning pipelines.
  • Care about quality and user experience — and take pride in building things that just work.
  • Are hands-on, humble, and willing to dig into unfamiliar parts of the stack to solve real problems.
  • Automate your way out of repetition, and know when to reach for existing tools vs building your own.
  • Enjoy working in a startup environment where speed, ownership, and impact matter.
  • Have been a founder or early engineer at a high-growth company (a plus, not a requirement).

Why Soniox

You’ll help build one of the most technically advanced AI platforms in the world — and shape how it reaches and supports users globally.

You’ll work directly with a world-class team of engineers and researchers solving frontier problems in speech and language AI.

You'll have a voice in how our company grows, how our customers succeed, and how AI transforms human communication.

Ready to join Soniox? Apply now