Machine Learning Team Leader

For our client, a leading player in the eCommerce industry, we are seeking a Machine Learning Team Leader to join a talented engineering team.RESPONSIBILITIESEnsure that the contractor team delivers high-quality ML Scoring solutions (e.g., click and conversion predictions) for Sponsored Offers on schedule, maintaining responsibility for the team's technical output and project milestones.Manage the training scope for deep learning models, including feature space definition and model lifecycle standards. Orchestrate the transition of scoring responsibilities from existing teams in cooperation with backend and product stakeholders. Provide expert insight to future roadmaps for the ML scope of Sponsored Offers.REQUIREMENTS8+ years of experience in Machine Learning or Data Science roles in production environments.2+ years of direct people management experience.Proven track record in leading end-to-end model training initiatives for business use cases.Strong practical expertise in the full model lifecycle: data preparation, feature engineering, training, evaluation, calibration, and controlled rollout.Hands-on proficiency in Python and SQL, with strong understanding of ML/deep learning frameworks (e.g., pytorch or tensorflow) and scalable data processing workflows.Experience operating ML workloads in cloud environments, preferably GCP (Vertex AI, BigQuery, Cloud Storage).Proven ability to drive cross-functional execution across ML, serving, and product domains, ensuring strategic alignment and performance visibility for Director-level stakeholders.Strong decision-making based on business impact metrics (revenue, GMV, conversion) and experimentation results.NICE TO HAVEExperience in AdTech, marketplace ranking, or recommendation systems at scale.Familiarity with model artifact repositories, CI/CD for ML, experiment tracking frameworks, and feature store integrationsExposure to online inference environments and cooperation with platform teams maintaining such services.Experience with developing pCTR/pCVR-like modelsWHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract and rate: about 170-230 PLN/hour remote work / Warsaw 1 day per monthThe support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client.Events and integration meetings, as well as participation in various initiatives, e.g., sports.Access to the benefits offering (medical care, Multisport card).WHAT DOES THE RECRUITMENT PROCESS LOOK LIKE?Application: Apply and submit your CV.After the application review, the recruiter will contact selected candidates by phone.Screening: Have a conversation with a speedapp recruiter about your experience.Next steps: The speedapp recruiter will explain the recruitment process for the specific position.The speedapp recruiter will stay in touch with you throughout the entire process.ABOUT SPEEDAPPAt speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them.👉 10 years of experience👉 +100 clients worldwide +300 hires per year💎 We have won the prestigious 'Forbes Diamonds' award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch.