Data Scientist (m/f/d)

Kayzen

Senior Data Scientist (m/f/d) Europe, Remote _______________________________________________ Hello👋I am Puneet, Co-founder and CPO at Kayzen, and I am now looking for a Senior Data Scientist to join our team 🙌 But wait, you have not heard of Kayzen before?😃 Kayzen is a mobile demand-side platform (DSP) dedicated to democratizing programmatic advertising. We enable leading apps, agencies, media buyers, and brands to run programmatic customer acquisition, retargeting, and brand performance campaigns through its self-serve and managed service options. Built on the three core pillars of performance, transparency, and control, Kayzen powers the world’s best mobile marketing teams with bespoke solutions that fuel business growth and deliver a competitive advantage. With an unprecedented scale of 160B+ daily ad requests from 1.6B+ unique users worldwide, we serve up to 1B+ ads per day in 180 countries. Kayzen is accessible through our APIs and user interface. The Team You will work with a carefully selected, diverse and globally distributed Data Science team (like Heiko, Chen) on various machine-learning models that process terabytes of data, serving billions of ad requests and users around the globe in real-time. We are highly motivated and aligned in our quest to disrupt the multi-billion dollar ad-tech industry. We would like you to be part of our journey, as our Senior Data Scientist (m/f/d). Responsibilities Our day-to-day work in Data Science and Machine Learning encompasses a wide range of activities, including: * Enhancing Models: Continuously improving existing models by incorporating new features, fine-tuning parameters, and utilizing additional data. * Algorithm Development: Collaborating with our Machine Learning Engineering team to develop and deploy scalable supervised and unsupervised learning algorithms. * Data Exploration: Identifying and exploring new data sources while researching innovative ways to leverage both new and existing data effectively. * Solution Research: Investigating new Machine Learning solutions to optimize every step of our value chain. * A/B Testing: Regularly conducting and evaluating A/B tests to drive insights and refine our strategies. You’ll be a great fit if you resonate with the following principles of Data Science and Machine Learning: * Simplicity First: We prioritize finding the best solutions to challenges rather than forcing problems to fit predetermined solutions. * Impact-Driven: We leverage Machine Learning to enhance our product and drive performance for our clients, always focusing on tangible business outcomes. * Collaborative Spirit: Our teams consist of analysts, engineers, and data scientists, making strong communication skills essential for success. * Embrace Experimentation: We believe in the power of experimentation to innovate and refine our approach continually. Requirements * Extensive experience in developing data science products, from initial research through to production deployment.   * Strong coding skills with a focus on clean, reproducible, and well-tested code.   * Proficient in key tools and technologies including Python, Spark, Hadoop, Airflow, Docker, and SQL.   * Hands-on experience with algorithms for handling sparse and large datasets, including applications in prediction, clustering, and outlier detection.   * Experience in building neural network-based products for tasks such as classification, regression, and multi-task learning is highly valuable.   * Bonus skills: Knowledge of reinforcement learning and large-scale optimization problems is a significant asset.   * Good understanding of dashboards and SQL for developing and enhancing monitoring tools.   * Previous experience in Ad-Tech is a must. What do we offer? * Directly working with Founders and an opportunity to drive direct impact * Exceptional career growth and learning opportunity * A unique opportunity to be part of an experienced team of industry experts and entrepreneurs who bring massive change to the Adtech market * A fun, driven, and multinational team located across Germany, India, Argentina, Canada, Spain, the UK and many more countries. * A flexible work-from-home arrangement * Opportunity to relocate to our office in Berlin * A 500-dollar home-office setup budget * A 1000-dollar annual learning and development budget

Artefact

TL;DR * You like to be up to the collection, analyse, and visualisation of data in a business context. * Our working language is in English, but it's always easier when you speak the local language(s) ;)   THE TEAM The DS team is a melting pot of around 100 Data Scientists with various backgrounds, previous experience and affinities. Some have been here since their graduations, others did work in startups, consulting firms or other companies before. Some had an engineering background from the start, others did first a business major before specializing in Data Science. Some studied statistics, others engineering systems. Every day is an opportunity to excel, to learn more and to face new challenges. Thanks to a tailor-made skills development program, you will be able to become a Swiss Army knife in data, all while developing very precise skills in our different expertise.   MISSION You design and deliver data solutions to and with our clients, which means developing data preparation pipelines, training algorithms, deploying them in infrastructures, and interacting with clients. You contribute to Artefact's internal and knowledge growth as well, by working on internal projects, recruitment interviews, coaching juniors, animations of knowledge-sharing events.   DESIRABLE SKILLS * If you are an aspiring data and machine learning expert, or if you are already there; * If you want to understand our clients' businesses: you are a problem solver, curious, open-minded, and willing to discover the subtleties of different sectors; * If you embrace the One-Team spirit; ... contact us!   WHY SHOULD YOU JOIN US * Artefact is the place to be: come and build the future of data and marketing * Innovation: We have a passion for creating impacting projects, and believe innovation can come from anyone. * Action: We make things rather than telling people how to make them. * Collaboration: We believe in bringing talented people together, in winning together, and in learning from each other. Come join us!

AutoScout24

A career driven by you. Join AutoScout24 Group and experience life in the fast lane. We’re not just leading the market; we’re creating it. We’re constantly innovating, evolving and transforming things for our customers. We’re driven, ambitious and determined to do our best work, together. For a career that doesn’t stand still, where you can put your ideas in the driving seat and change the way the world moves, join our international community.  As Principal Data Scientist, you will define and drive the data science strategy across AutoScout24, with a strong focus on AI, machine learning, and Generative AI. You will work closely with product, engineering, and business leaders to turn data into scalable products that create clear business impact. You will lead senior data scientists and act as a technical role model across the company. WHAT YOU’LL DO  * define and own the data science and AI strategy across the organization * lead development and scaling of predictive and generative AI models for marketplace and fintech use cases * partner with product and business leaders to align ML initiatives with company goals * design scalable ML systems and cloud-based workflows for training and deployment, with a strong focus on AWS * build and operate production-ready ML solutions using AWS services (e.g. SageMaker, S3, Lambda, EMR, etc.) * ensure model quality, monitoring, governance, and compliance in production * mentor and develop data scientists and act as senior technical advisor  YOU COME WITH  * 10+ years of experience in data science, machine learning, or applied AI * strong hands-on skills in Python, SQL, and common ML frameworks * proven experience with GenAI and LLMs in real products * strong experience with AWS and its ML/data ecosystem (e.g. SageMaker, S3, EKS, Lambda, IAM) * solid background in cloud platforms, MLOps, and model deployment * ability to translate complex topics into clear business decisions * experience leading senior teams and shaping technical strategy  A culture of growth. With over 50 nationalities represented, we’re proud to welcome people of all backgrounds to our growing community, and we’re always finding new ways to help people feel welcomed and included. Here, you’ll have the tools, training and support you need to work in a way that suits you, learn new skills and reach your potential.  For a career where you can drive our business and shape your future, apply now.