Principal ML Engineer: Cross-Product AI

Principal Machine Learning EngineerParis, France (Hybrid) | Up to €135,000 Base + Bonus (c.€150,000 OTE)This is an opportunity to join a growing, profitable AI-driven technology business where machine learning is central to the product and commercial strategy. The role offers a rare blend of technical leadership and hands-on engineering, allowing you to...

Spendesk is seeking a Backend Software Engineer (IC3) to join the AI & Data Products squad. You will design, build and operate backend services powering AI-native features, translating ML outputs into reliable APIs and workflows for end users.You will collaborate with ML Engineers and Product teams to productionize predictive logic, implement robust...

Who we areYubo is the Social Discovery app to make new friends and hang out online. By eliminating likes and follows, we empower our users to create genuine connections and show up as their true selves.We've pioneered a new way for Gen Z to socialize online, and with millions of active users, our goal is to redefine how we connect today and tomorrow.Our team...

Harnham in Paris is seeking a Principal Machine Learning Engineer to lead and shape ML strategy in a hybrid setting. You’ll balance technical leadership with hands-on model development in large-scale real-time systems across production environments.Join a profitable AI-driven business focused on competitive ML infrastructure, recommender and bidding...

TLDR: We are looking for an ML Infrastructure Engineer to build the systems behind our LLM post-training, RL, evaluation, inference, and agentic development workflows. You will work close to researchers, GPUs, training loops, data control systems, evals, inference stacks, and the infrastructure decisions that directly affect model learning and product...

TLDR: We are looking for several ML Engineers to train, post-train, and evaluate the LLMs at the core of our platform. This is hands-on modern model training work: large-scale data pipelines, SFT/RLHF/DPO-style alignment, reward models, distributed multi-GPU training, and evaluation.About usWhite Circle is an AI Safety company building the safety,...

About Mirakl: Founded in 2012, Mirakl has been at the forefront of marketplace innovation, empowering every business to compete in the platform economy. Today, Mirakl’s operating system combines an enterprise marketplace solution (Mirakl Platform) that enables retailers and B2B organizations to launch, scale, and operate marketplaces and dropship,...

TLDR: Multimodal ML Engineer to train and ship vision, audio, video, and speech models for an AI safety platform that operates at 100M+ API calls/month.About usWhite Circle is an AI Safety company building the safety, reliability, and optimization layer for AI systems. At the core of our platform are policies – simple natural-language rules that define...

About MistralMistral provides full-stack AI solutions: from frontier models to developer tools, applications, and compute. We partner with enterprises tackling the hardest problems—across high-stakes industries like finance, manufacturing, defense, healthcare, and the public sector—co-creating customized AI systems that they can run on their terms.We are...