{"id":191830,"url":"https://alion.io/job/hugging-face-senior-machine-learning-engineer-voice-agents-emea-remote","title":"Senior Machine Learning Engineer, Voice Agents - EMEA Remote","company":{"id":21,"name":"Hugging Face","domain":"huggingface.co","url":"https://alion.io/company/hugging-face","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workable","truth_index":null},"role":"AI/ML","role_family":"AI/ML","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_regions","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Paris, France"],"countries":["FR"],"hiring_countries":["DE","FR","AE","GB","AT","BE","BA","BG","HR","CY","CZ","DK","FI","HU","IE","IL","IT","KE","ME","NL","NG","NO","PL","RO","SA","RS","ZA","ES","SE","CH","TR","UA","AL","DZ","AD","AO","BH","BJ","BW","BF"],"hiring_countries_total":116,"salary":null,"salary_estimate":{"min_usd":56000,"max_usd":112000,"period":"year","method":"role_seniority_country_cell","sample_n":46},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"GitHub","optional":false},{"name":"Hugging Face","optional":false},{"name":"Multimodal AI","optional":false},{"name":"Python","optional":false},{"name":"Speech Recognition","optional":false},{"name":"Text-to-Speech","optional":false},{"name":"Voice Agents","optional":false},{"name":"WebRTC","optional":false},{"name":"WebSockets","optional":false},{"name":"Edge AI","optional":true},{"name":"LiveKit","optional":true},{"name":"llama.cpp","optional":true},{"name":"Machine Learning","optional":true},{"name":"Quantization","optional":true}],"status":"live","first_seen_at":"2026-09-02T00:00:00Z","employer_posted_date":"2026-09-02","last_verified_at":"2026-10-31T01:38:28Z","board_verified":true,"closed_at":null,"days_open":59,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":59},"description":"At Hugging Face, we're on a journey to democratize good AI. We are building the fastest growing platform for AI builders with over 11 million users who collectively shared over 3M+ models, 1M+ datasets & 1.47M+ apps. Our open-source libraries have more than 600k+ stars on Github.\nAbout the Role\nWe are building the open voice-agent stack for Hugging Face, and we are looking for a senior engineer to own a large part of it.Two things sit at the centre of this role. The first is speech-to-speech, our open-source library for realtime voice agents. The second is hf-voice, a new product that will let any developer build and deploy voice agents with their Hugging Face account.\nThe library already powers the Reachy Mini fleet and there is a public demo running on Spaces, so you won't start from a blank page. But almost everything about how this becomes a product developers rely on is still open, and you will have a direct say in it.\nYour missions:\n- Own the Open-Source Library:\nTake architectural ownership of large parts of speech-to-speech: pipeline design, latency budget, and the reliability of the realtime loop.\nIntegrate new ASR, TTS and end-to-end speech models as they land, and keep the abstractions clean while the model landscape keeps moving.\nReview community PRs, triage issues, cut releases, and grow the group of contributors around the project.\n- Ship hf-voice:\nDesign the developer API and the streaming protocol: session lifecycle, transport (WebSockets/WebRTC), authentication, error semantics, versioning.\nBuild the serving side: realtime inference on GPU, concurrency, autoscaling, observability, and cost per session.\nWork with the Hub and inference teams so that a working voice agent is easy to integrate into products and demos.\nTake the product from demo to production: load testing, SLOs, graceful degradation when a model or a network path misbehaves.\n- Work in the Open:\nWrite the docs, examples and templates that get a developer from zero to a running agent in minutes.\nSupport the deployments already relying on the stack, starting with the Reachy Mini fleet.\nTalk about the work publicly if you enjoy it: blog posts, demos, conference talks. We cover the travel and the prep time.\nRequirements\nWhat we're looking for\nSenior engineer, able to own a substantial part of an architecture and drive it forward autonomously.\nExperience building developer-facing infrastructure at an AI or developer-tools company: inference APIs, agent infrastructure, or something comparable.\nSubstantial open-source contributions to a Python library. Comfortable with async Python and distributed systems, including their failure modes.\nYou have shipped something realtime: streaming, WebSockets or WebRTC, audio or video pipelines, live inference.\nPractical experience with LLMs or multimodal models in production. Clear written communication and a habit of collaborating async and in public.\nMotivated by voice and conversational AI.\nBonus points if you have\nContributions to a voice-agent framework such as speech-to-speech, pipecat, LiveKit Agents, Vocode or TEN.\nContributions to llama.cpp or another low-level inference runtime.\nHands-on work with ASR, TTS or end-to-end speech models, including evaluation of latency and quality trade-offs.\nGPU serving, quantization, or on-device inference experience.\nAudio pipeline knowledge: VAD, echo cancellation, jitter buffers, barge-in and turn detection.\nExperience shipping to embedded or robotics targets.\nA public track record: talks, blog posts, demos.\nAbout You\nIf you're interested in joining us, but don't tick every box above, we still encourage you to apply! We're building a diverse team whose skills, experiences, and backgrounds complement one another. We're happy to consider where you might be able to make the biggest impact.\nOne more thing\nAt Hugging Face we believe great AI shouldn't require a massive cluster, we build for everyone, especially the GPU-poor. And because we read every application, here's a small sign that you read this one too: start your answer to the first application question with the words “GPU-poor and proud ”. No trick, no catch, it just tells us a real person is on the other side.\nBenefits\nMore about Hugging Face\nWe are actively working to build a culture that values diversity, equity, and inclusivity. We are intentionally building a workplace where people feel respected and supported-regardless of who you are or where you come from. We believe this is foundational to building a great company and community. Hugging Face is an equal opportunity employer and we do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.\nWe value development. You will work with some of the smartest people in our industry. We are an organization that has a bias for impact and is always challenging ourselves to continuously grow. We provide all employees with reimbursement for relevant conferences, training, and education.\nWe care about your well-being. We offer flexible working hours and remote options. We offer health, dental, and vision benefits for employees and their dependents. We also offer parental leave and flexible paid time off.\nWe support our employees wherever they are. While we have office spaces in NYC and Paris, we're very distributed and all remote employees have the opportunity to visit our offices. If needed, we'll also outfit your workstation to ensure you succeed.\nWe want our teammates to be shareholders. All employees have company equity as part of their compensation package. If we succeed in becoming a category-defining platform in machine learning and artificial intelligence, everyone enjoys the upside.\nWe support the community. We believe major scientific advancements are the result of collaboration across the field. 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