Senior Data Scientist - AdTech (6-month Contract)

We’re seeking a highly skilled, execution-focused Senior Data Scientist with a minimum of 5 years of experience. This role demands hands-on expertise in building, deploying, and optimizing machine learning models at scale, while working with big data technologies and modern cloud platforms. You will be responsible for driving data-driven solutions from experimentation to production, leveraging advanced tools and frameworks across Python, SQL, Spark, and AWS. The role requires strong technical depth, problem-solving ability, and ownership in delivering business impact through data science. Responsibilities Design, build, and deploy scalable machine learning models into production systems. Develop advanced analytics and predictive models using Python, SQL, and popular ML/DL frameworks (Pandas, Scikit-learn, TensorFlow, PyTorch). Leverage Databricks, Apache Spark, and Hadoop for large-scale data processing and model training. Implement workflows and pipelines using Airflow and AWS EMR for automation and orchestration. Collaborate with engineering teams to integrate models into cloud-based applications on AWS. Optimize query performance, storage usage, and data pipelines for efficiency. Conduct end-to-end experiments, including data preprocessing, feature engineering, model training, validation, and deployment. Drive initiatives independently with high ownership and accountability. Stay up to date with industry best practices in machine learning, big data, and cloud-native deployments. Requirements Minimum 5 years of experience in Data Science or Applied Machine Learning. Strong proficiency in Python, SQL, and ML libraries (Pandas, Scikit-learn, TensorFlow, PyTorch). Proven expertise in deploying ML models into production systems. Experience with big data platforms (Hadoop, Spark) and distributed data processing. Hands-on experience with Databricks, Airflow, and AWS EMR . Strong knowledge of AWS cloud services (S3, Lambda, SageMaker, EC2, etc.). Solid understanding of query optimization, storage systems, and data pipelines. Excellent problem-solving skills, with the ability to design scalable solutions. Strong communication and collaboration skills to work in cross-functional teams. Benefits Best-in-class salary: We hire strong talent and compensate accordingly. Proximity Talks: Meet and learn from designers, engineers, product leaders, and AI practitioners. Continuous learning: Work with a world-class team and stay close to the latest in AI, engineering, and product development. High-impact work: Build AI-first systems and products used at scale by global clients. About Us Proximity is the trusted technology, design, and consulting partner for some of the biggest Sports, Media, and Entertainment companies in the world. We’re headquartered in San Francisco and have offices in Palo Alto, Dubai, Mumbai, and Bangalore. Since 2019, Proximity has built high-impact, scalable products used by millions of users every day. Today, we are a global team of engineers, designers, product managers, and experts solving complex problems and building cutting-edge technology at scale.