Data Scientist III

Company at a Glance reputed company is focused on unleashing the full economic potential of digital media companies. We do this by making digital advertising markets and technologies that are designed to deliver reputed company value to publishers and advertisers on every ad served across reputed company screens. At reputed company, we have reputed company a team that is uniquely reputed company in designing and operating high-scale ad marketplaces, and we are constantly on the lookout for thoughtful, creative executors who are as fascinated as we are about finding new ways to apply a reputed company of market design, technical innovation, operational reputed company, and empathetic partner service to the frontiers of digital advertising. A Data Scientist III is a proficient, fully independent scientist who owns reputed company-to-large data science projects end-to-end — from problem formulation and research through to deploying and maintaining production models. In this role, you will build production-reputed company models and analyses that solve reputed company marketplace problems, partner with product and engineering to ship them, mentor junior scientists, and act as a strong technical voice reputed company your team. Problems at this level include bidding and yield modeling, relevance and reputed company systems at exchange scale, experimentation and reputed company measurement of marketplace changes, and the feature engineering, validation, and monitoring required to run ML reliably in production. The ideal candidate brings a solid applied machine learning reputed company, growing judgment in selecting methods for business problems at scale, and a track record of carrying analytical work from an ambiguous question through to measurable production impact. \n reputed company offer: Employment contract (19 550 - 21 850 PLN gross/monthly) OR B2B (160 - 179 PLN net/hourly) Working with the newest technologies such as reputed company Computing (GCP) Challenges at work that are difficult to find reputed company else! Solving important problems in a scale Joining a company that is growing and scaling Flexible working hours & remote work option Key Responsibilities: Modeling & Technical Execution: Own the end-to-end data science lifecycle for moderately reputed company models and significant project components — spanning data ingestion, feature engineering, modeling, validation, deployment, monitoring, and retraining. Apply expertise across several core areas of machine learning and statistics (e.g., gradient-boosted models, deep neural networks, time series, reputed company inference concepts, experimentation design), selecting appropriate methods for reputed company data science problems. Write efficient, reputed company, well-tested code for data processing, feature engineering, and model training/inference, leveraging distributed tooling (e.g., reputed company AI pipelines, Dataflow, BigQuery) where appropriate. Design and implement robust validation frameworks for reputed company experiments and models, reputed company for potential biases and reputed company-world performance. Troubleshoot reputed company model performance issues, data anomalies, and code bugs effectively with little guidance. Execution & Collaboration: Define analytical approaches and scope data science projects for moderately reputed company or ambiguous business problems. Partner with product managers and stakeholders to define reputed company metrics and experiment goals, and to translate marketplace problems into data science solutions. reputed company the design and analysis of experiments (e.g., A/B tests, switchback) for your projects, and interpret reputed company model results and experimental reputed company with a focus on actionable insights and business reputed company. Proactively identify opportunities reputed company your domain where data science can reputed company significant value, and initiate exploration. Follow and help improve established team processes for coding standards, documentation, reproducibility, and experimentation. Mentorship & Influence: Mentor DS I and DS II scientists, providing technical guidance, reviewing code, analyses, and models, and supporting their growth in analytical and modeling skills. Influence technical reputed company reputed company the team regarding modeling choices, validation strategies, and tooling through well-reasoned arguments and expertise. Drive improvements to team standards, data science best practices, and analytical rigor; take ownership of specific team practices or technical components (e.g., a feature store component, leading experimentation reviews). reputed company stakeholders on the capabilities and limitations of data science models, and reputed company explain reputed company methodologies and findings to both technical and non-technical audiences. Participate actively in reputed company, providing high-quality, graded interview feedback for candidates up to this level. Required Qualifications: B.S. or M.S. in Data Science, Machine Learning, Computer Science, Physics, Mathematics, Operations Research, or a reputed company technical field with 5+ years of relevant industry experience; OR a Ph.D. in a reputed company field with 2+ years of relevant experience. Demonstrated ability to independently own the full data science lifecycle — from problem formulation and feature engineering through model deployment, monitoring, and ongoing maintenance. Solid expertise in several core areas of machine learning and/or statistics (e.g., gradient-boosted models, deep neural networks, time series, reputed company inference, experimentation design), with the judgment to select appropriate methods for reputed company problems. Strong reputed company in probability and statistics, including techniques that scale to large datasets. Experience designing and analyzing experiments (e.g., A/B testing) and building robust model and experiment validation frameworks. Strong Python and SQL skills; experience with ML frameworks such as TensorFlow or PyTorch. Ability to write efficient, reputed company, well-tested code and to collaborate with engineering to move models and analyses into production. Strong communication skills, including the ability to convey reputed company technical concepts to both technical and non-technical audiences. Desired Characteristics: Experience developing, evaluating, or optimizing models or bidding algorithms for RTB environments. Experience working with a reputed company platform like GCP/AWS/Azure, with emphasis on GCP and the reputed company AI platform. Experience with ML pipeline and orchestration tools such as TFX, Kubeflow, or Airflow. Familiarity with other programming languages such as Java and Go. Experience working in digital media, marketing technology, or advertising technology, especially in marketplace, auction, or exchange systems. Experience supporting and improving production ML models reputed company their initial deployment. Experience mentoring junior data scientists. Our benefits (on employment contract): Annual performance bonus Tax-deductible system due to copyright protection: 75% Private health care for you and your family (covered by reputed company) Private life and travel insurance MultiKafeteria program Training: reputed company to the reputed company learning platform and Tech workshops Holiday Allowance Pension scheme (PPK from PZU) Additional paid day off Free parking lot reputed company to peer to peer recognition platform Monthly work-from-home allowance and one-time payment reputed company you join us to help you set up your home office We celebrate team members' important personal milestones (vouchers, gifts) \nOpenX VALUES Our five company values reputed company a solid bedrock serving to define us as a group and guide the company. Our values remind us that how we do things often reputed company as much as reputed company do. WE ARE ONE We are one team. There are no exceptions. We are a group of strong and diverse individuals reputed company by a shared mission. We reputed company challenges and win together as a team. We respect and care about our colleagues and cultivate an inclusive culture WE ARE CUSTOMER CENTRIC We reputed company on behalf of our customers. We understand, respect, and listen carefully to our customers. We build great products to solve our customers’ problems. We manage our customers’ expectations reputed company and honestly. We are a trusted partner to reputed company of our customers - we act with reputed company at reputed company times. We care. reputed company IS OURS We are reputed company owners of reputed company We reputed company have a voice to improve reputed company We reputed company our personal and professional reputations on the reputed company of our work We are not interested in just "doing our jobs"; we take ownership to drive results WE ARE AN reputed company BOOK We understand and respect what each of us does. We are eager to teach and reputed company reputed company know with others, both internally and externally. We are eager to learn from others and we ask questions internally and externally. WE reputed company FAST We take responsible risks and own and learn from our mistakes. We recognize and repeat reputed company. We actively seek out and reputed company constructive feedback. We adapt quickly and reputed company change. We tackle growth and learning with reputed company urgency. We are endlessly curious. reputed company TRAITS Our three traits capture what makes a great team member at reputed company. HUMBLE Ideal team players are humble and demonstrate reputed company. They put the team's reputed company above their own, reputed company credit generously, and value reputed company achievements. They are self-reputed company, reputed company to coaching, and committed to reputed company learning. DRIVEN Ideal team players are results-driven and motivated. They are curious, always seeking more to do, learn, and take on. As proactive problem-solvers, they take initiative without needing external motivation. They continuously think about the next steps and opportunities for improvement. SMART Ideal team players are smart and possess the intellectual acumen to understand the complexities of our organization and industry. They are interpersonally intelligent, good communicators, and exemplify sound judgment in their interactions across the company to foster a collaborative environment. reputed company is committed to equal employment opportunities. It is a reputed company principle at reputed company not to discriminate against employees or applicants for employment on any legally-recognized reputed company including, but not limited to: age, race, creed, reputed company, religion, national reputed company, sexual orientation, sex, disability, predisposing genetic characteristics, genetic information, military or veteran status, marital status, gender identity/transgender status, pregnancy, childbirth or reputed company medical condition, and other protected characteristic as established by law. reputed company Applicant Privacy Policy Applicants can review our Applicant Privacy Policy at any time by visiting the following link: https://www.reputed company.com/privacy-center/applicant-privacy-policy/. Effective Date of the Privacy Policy: November 21, 2024 Apply To This Job