Staff Machine Learning Engineer

Join to apply for theStaff Machine Learning Engineer - Applied ML & Researchrole atHappening 2 weeks ago Be among the first 25 applicants Join to apply for theStaff Machine Learning Engineer - Applied ML & Researchrole atHappening Get AI-powered advice on this job and more exclusive features. As aStaff Machine Learning Engineerin ourApplied ML & Research team , you'll drive the development of cutting-edge machine learning solutions that power critical features across our online gaming platforms. Your work will directly impact platform security, user experience, and large-scale data-driven decision-making for hundreds of thousands of users daily.This role blends hands-on technical work with strategic thinking. You’ll lead by example, contribute high-quality code, and help shape the ML roadmap in the organization through cross-functional collaboration.What you’ll you be doing:Identify high-impact ML opportunities and influence stakeholders to prioritize and support these initiatives. Design and develop scalable machine learning models — including classifiers, regressors, and rule-based systems — to solve real-world problems. Own the full ML lifecycle: from data exploration and feature engineering to model training, evaluation, and deployment. Translate complex technical concepts into clear insights for both technical and non-technical stakeholders. Set and guide technical direction across ML projects, ensuring technical best practices as well as alignment with business goals. Mentor junior engineers and foster a culture of knowledge sharing and continuous improvement.We're looking for someone with:Master’s degree (or equivalent) in Machine Learning, Data Science, Statistics, Mathematics, Computer Science, or a related field. 7+ years of industry experience building and deploying ML models at scale. Proven ability to lead cross-functional technical initiatives and influence engineering strategy. Proficiency in Python (with libraries like PyTorch, XGBoost, Scikit-learn) and SQL. Strong experience with machine learning pipelines and orchestration tools such as Airflow, SageMaker Pipelines, or similar. Deep understanding of machine learning fundamentals, including experience with Large Language Models (LLMs) and other emerging ML technologies. A track record of shipping production-level ML products and maintaining high code quality. Excellent problem-solving skills and ability to scope and disambiguate complex ML projects into clear, achievable milestones.Bonus points for:Familiarity with ML tooling such as MLflow, ZenML, or Metaflow. Hands-on experience with AWS services (e.g., EC2, EKS, CloudFormation, Cognito). Exposure to streaming data platforms like Kafka. Contributions to open-source ML projects or publications in ML conferences.Seniority levelSeniority level Mid-Senior level Employment typeEmployment type Full-time Job functionJob function Engineering and Information Technology Industries Technology, Information and Internet Referrals increase your chances of interviewing at Happening by 2x Sign in to set job alerts for “Machine Learning Engineer” roles.Madrid, Community of Madrid, Spain 2 months ago Madrid, Community of Madrid, Spain 1 day ago Madrid, Community of Madrid, Spain 3 weeks ago Madrid, Community of Madrid, Spain 4 hours ago Madrid, Community of Madrid, Spain 5 days ago Madrid, Community of Madrid, Spain 3 weeks ago Madrid, Community of Madrid, Spain 3 hours ago Madrid, Community of Madrid, Spain 1 week ago Data Scientist for the Genetic & Molecular Epidemiology GroupMadrid, Community of Madrid, Spain 1 week ago Madrid, Community of Madrid, Spain 1 week ago Madrid, Community of Madrid, Spain 5 days ago Madrid, Community of Madrid, Spain 1 month ago Madrid, Community of Madrid, Spain 3 weeks ago Madrid, Community of Madrid, Spain 1 week ago Junior Data Scientist - EY wavespace Data & AI hubMadrid, Community of Madrid, Spain 4 days ago Madrid, Community of Madrid, Spain 5 days ago Madrid, Community of Madrid, Spain 5 days ago Madrid, Community of Madrid, Spain 2 weeks ago Madrid, Community of Madrid, Spain 15 hours ago Madrid, Community of Madrid, Spain 3 weeks ago Madrid, Community of Madrid, Spain 5 hours ago MACHINE LEARNING ENGINEER – ANALYTICS BANKINGMadrid, Community of Madrid, Spain 2 hours ago Madrid, Community of Madrid, Spain 1 week ago Madrid, Community of Madrid, Spain 1 month ago AI Scientist - Data & AI Officer (CDAIO)Boadilla del Monte, Community of Madrid, Spain 5 days ago Alcobendas, Community of Madrid, Spain 6 days ago Madrid, Community of Madrid, Spain 1 week ago Madrid, Community of Madrid, Spain 3 weeks ago Madrid, Community of Madrid, Spain 1 month ago Artificial Intelligence/Machine Learning EngineerMadrid, Community of Madrid, Spain 8 months ago Madrid, Community of Madrid, Spain 3 weeks ago Madrid, Community of Madrid, Spain 2 months ago Madrid, Community of Madrid, Spain 6 days ago Madrid, Community of Madrid, Spain 1 month ago Madrid, Community of Madrid, Spain 6 days ago Madrid, Community of Madrid, Spain 1 week ago We’re unlocking community knowledge in a new way. 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