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AI/ML Harness Engineer

Karumi· Engineering
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Hybrid (New York, NY), Hybrid (Madrid, ES)$80/hr - $170/hrFull-timePosted 4w ago

About the role

Join Karumi's AI engineering team to build core intelligence behind the platform, focusing on voice AI, browser automation, and large language models to create responsive agents that listen, speak, navigate interfaces, and interact with users in real-time.

Responsibilities

  • Build and optimize voice AI systems using speech-to-text and text-to-speech models
  • Design browser agents that navigate, understand, and interact with web applications
  • Implement browser automation with computer vision and DOM understanding
  • Engineer prompt systems and LLM workflows for consistent, intelligent behavior
  • Create evaluation frameworks to measure voice quality, agent accuracy, and user experience
  • Integrate multimodal AI - combining voice, vision, and language understanding
  • Build real-time AI pipelines where latency and reliability are critical
  • Manage the AI Infrastructure and take care of it
  • Monitor and improve AI system performance in production environments

Qualifications

  • Production experience with LLMs (OpenAI, Anthropic, or open-source models)
  • Hands-on work with speech AI (STT/TTS systems like Deepgram, ElevenLabs, Whisper)
  • Experience with browser automation (Playwright, Puppeteer, Selenium) or computer vision
  • Strong Python skills with async programming and real-time systems
  • Understanding of prompt engineering, retrieval systems, and agent frameworks
  • Ability to debug complex AI behaviors and build observability tools
  • Software engineering fundamentals for production AI systems

Skills

Required:PythonLLMsSpeech AIBrowser Automation
Nice to have:Computer Vision

Benefits

  • Meaningful equity stake in a backed, fast-growing company
  • Visa sponsorship available
  • Gym
Last updated Oct 25, 2026. Interested? Apply on the company site.
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About Karumi

The Waymo of Personalized demos

Karumi is an AI agent that joins a live video call with your prospects to deliver personalized product demos, 24/7, in any language. It bridges the gap between your landing page and your sales team by engaging visitors at the peak of their interest, turning curiosity into conversion. For those not ready to talk to sales but eager to explore, Karumi offers the next generation of interactive, self-guided demos.

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