A fast-moving team working at the forefront of mobile advertising is looking for a Lead Data Scientist to help shape the future of programmatic monetisation. This role offers the opportunity to work on real-time bidding systems where ads are auctioned and rendered in milliseconds across thousands of mobile apps. The team develops advanced algorithms and data-driven systems that directly compete with some of the biggest names in the industry. With a focus on research-driven innovation, the team aims to balance the needs of users, publishers, and advertisers while maintaining a high-quality user experience. The Lead Data Scientist will be responsible for growing and mentoring a team, driving technical direction, and contributing directly to data science projects. At least half of the role will involve hands-on work, with the remainder focused on leadership, collaboration, and strategic planning. Key ResponsibilitiesBuild and lead a high-performing data science team, including hiring, mentoring, and setting best practicesTranslate business goals into data solutions that strengthen the competitiveness of the ad platformWork on data science tasks individually, contributing significantly to project outcomesDocument experiments, methodologies, and implementation details clearlyCollaborate closely with product, infrastructure, and business teamsContribute to strategic planning and define quarterly and long-term objectivesRequired Skills and ExperienceA degree in mathematics, physics, computer science or equivalent experience in data science (minimum 5 years)At least 2 years of leadership experience, including line management and career development supportStrong programming skills in Python, R, Scala, Julia or similar languagesProven analytical skills and a solution-oriented mindsetExperience working with large-scale data platforms such as AWS Athena, Kafka, Spark, Flink, and S3Expertise in scailing recomendation systemsAbility to explain complex mathematical concepts in simple termsExcellent communication skills and experience working across teamsDesirableExperience building and selecting technologies for a modern data science tech stack (e.g. Airflow, Kafka, Flink)Understanding of MLOps and collaboration with engineering teamsBenefits and PerksHybrid working model with up to two remote days per week and three weeks per year of remote work from anywhere30 days annual leaveComprehensive relocation support including visa assistance, relocation bonus, and reimbursement for language coursesMonthly company lunches, snacks, and fresh pastriesAccess to an in-house gym, personal trainer, and wellness classesFrequent team and company eventsBudget for professional development, training, and certificationsEquity programme for full-time employeesMental health and wellbeing support through a dedicated assistance programme
Anthony Kelly