About cozycozyCozycozy is the only platform that gives you real-time access to all available holiday accommodations. Whether you're searching for a hotel, apartment, hostel, villa, or even a treehouse, our service features over 20 million listings from over 100 booking sites. You will find popular options like Airbnb, Booking.com, Abritel/VRBO and hotels.com, as well as plenty of specialised marketplaces to explore, such as Agriturismo, Gîtes de France, Onefinestay, Belvilla, Sonder, Travelski, and many others.Experiencing rapid growth, we are now present in over 50 countries in 20 languages, with offices in Paris and Budapest. You’ll be part of an international team (with 12 nationalities represented) that’s passionate about travel and innovation. By joining cozycozy, you’ll have the opportunity to make a real impact by helping millions of travelers worldwide find their perfect accommodation!This is the opportunity to push AI forward in a team that tries to solve one of the biggest problems in travel: planning your holiday travel. We are looking for a dynamic and dedicated LLM/Gen AI Engineer ready to fully engage in supporting our rapid growth. Reporting directly to the VP of Business & Product Innovation, you will be a key pillar of our innovation strategy.Main ResponsibilitiesOwn the full lifecycle of AI features, from technical design to production rolloutFine-tune and deploy large language models using machine learning frameworksBuild pipelines for pretraining, instruction tuning, and RAGDevelop scalable, low-latency inference servicesCollaborate with the backend and DevOps teams to seamlessly integrate foundation models into production-ready environmentsCollaborate with the product team to deliver user-focused, timely, robust and high-performance solutionsTrack model performance and continuously improve deployed solutions, focusing on model performance and data integrityStay current with market trends and published papers, evaluate applicability to our stackParticipate in peer reviews, write meaningful tests, and maintain up-to-date documentationRequirements3+ years as a ML/AI engineer, preferably in startups or scale-ups, with at least 1 year hands-on with LLMs or GenAIMaster’s degree or Ph.D in Maths or Engineering from a top university or “Grande École”Fluency in Python, solid mastery of ML/CV librariesStrong knowledge of modern deep learning (transformers, attention, tokenization, embeddings).Practical experience fine-tuning or deploying LLMs (open weights or via API).Comfortable working with a variety of data storage systems, including relational, NoSQL, and vector databasesFamiliar with modern data infrastructure, such as data warehouses and lake architecturesExperience optimizing models for latency and costExposure to multi-modal architectures involving text, image, or other data typesA product mindset: you think in terms of user impact, not just codeFluent in EnglishBonus pointsExperience in bare-metal and/or hybrid cloud environmentsExperience in C/C++Experience in the travel tech space or with large-scale search platformsOur Full Technology StackProgramming: Node.js, Angular, TypeScript, Python, Golang, RxJS, HTML, CSSDatabases: MongoDB, MySQL, PostgreSQL, RedisInfrastructure & Other Tools: Linux, Kubernetes, Docker, Gitlab, Jenkins, Grafana, Jupyter, RabbitMQ, Google Pub/Sub, Airflow, Spark, PrometheusWhy join cozycozy?The opportunity to play a key role in the development of a fast-growing startup.A stimulating work environment within an international team.A strong entrepreneurial culture, with numerous projects to imagine and lead.Office located in the heart of Paris with unlimited coffee/tea, drinks, and snacks.Health insurance with Alan and a Swile card.
