Senior Data Scientist

Jobgether; Portugal; Híbrido; EUR 65 000 - 105 000; Tempo integral

Vantagens oferecidas por esta oferta de emprego

Direct collaboration with founders

Career development

Work with industry specialists

Multinational distributed team

Flexible work-from-home

Relocation to Berlin

Home-office setup budget

Learning & development budget

Resumo da oferta

Jobgether in Portugal is seeking a Senior Data Scientist to develop and improve machine learning products at global scale, handling large datasets and real-time models processing billions of ad requests.

You will collaborate with data scientists, analysts, and ML engineers to deploy scalable solutions that boost customer acquisition, retargeting, and advertising performance across a global platform, with a strong emphasis on experimentation. You’ll join a distributed team focused on innovation.

Qualificações

• At least 5 years of professional experience developing data science or machine learning products.
• Strong programming skills and a commitment to clean, maintainable, reproducible, and well-tested code.
• Hands-on experience with Python, Spark, Hadoop, Airflow, Docker, and SQL.
• Experience with algorithms for sparse and large-scale datasets: prediction, clustering, outlier detection.
• Practical experience with neural networks for classification, regression, multi-task learning is valuable.
• Knowledge of reinforcement learning and large-scale optimization is an advantage.
• Good understanding of SQL and dashboards for monitoring data science/machine learning systems.
• Strong communication and collaboration with data scientists, analysts, and engineers.
• Pragmatic, experimentation-oriented mindset focused on measurable product outcomes.
• Previous professional AdTech experience, ideally with mobile app advertising technology.

Responsabilidades

• Develop, enhance, and optimize ML models by introducing new features and data sources.
• Collaborate with ML Engineers to research, develop, and deploy scalable algorithms.
• Explore new data sources to improve model performance and create data-driven solutions.
• Research and evaluate innovative ML approaches to optimize product and ad value chain.
• Design, run, and analyze A/B tests to measure impact and improve models.
• Handle sparse, high-volume datasets for prediction, clustering, and outlier detection.
• Contribute to neural-network products for classification, regression, and multi-task learning.
• Write clean, reproducible, and well-tested code moving research into production.
• Develop monitoring tools and dashboards to track model and system performance.
• Collaborate with analysts, engineers, and data scientists to translate business challenges.
• Apply an experimentation-driven approach prioritizing simple, effective solutions.

Conhecimentos

Strong communication

Collaboration

Experimentation mindset

Product impact focus

Ferramentas

Python

Spark

Hadoop

Airflow

Docker

SQL

Descrição da oferta de emprego

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Data Scientist based in Portugal.

As a Senior Data Scientist, you’ll develop and improve machine learning products operating at exceptional global scale.

You’ll work with large, complex datasets and models that process billions of ad requests and users in real time.

The role spans the full data science lifecycle, from research and experimentation through production deployment and optimization.

You’ll collaborate closely with data scientists, analysts, and machine learning engineers to build scalable solutions with measurable business impact.

Your work will help optimize customer acquisition, retargeting, and advertising performance across a global technology platform.

You’ll have significant opportunities to experiment with new algorithms, data sources, and modeling approaches.

Joining a distributed, international team, you’ll contribute to a fast-moving environment focused on innovation, collaboration, and continuous learning.

Accountabilities

• Develop, enhance, and optimize machine learning models by introducing new features, tuning parameters, and incorporating additional data sources.
• Collaborate with Machine Learning Engineers to research, develop, and deploy scalable supervised and unsupervised learning algorithms.
• Explore new and existing data sources to identify opportunities for improving model performance and creating new data-driven solutions.
• Research and evaluate innovative machine learning approaches that can optimize different stages of the product and advertising value chain.
• Design, run, and analyze A/B tests to validate hypotheses, measure impact, and continuously improve models and strategies.
• Develop solutions capable of handling sparse, high-volume datasets for use cases such as prediction, clustering, and outlier detection.
• Contribute to neural-network-based products supporting classification, regression, and multi-task learning.
• Build clean, reproducible, and well-tested code that can reliably move from research environments into production.
• Develop and improve monitoring tools and dashboards to track model and system performance.
• Work collaboratively with analysts, engineers, and other data scientists to translate business and product challenges into practical machine learning solutions.
• Apply an experimentation-driven, impact-focused approach, prioritizing simple and effective solutions over unnecessary complexity.

Requirements

• At least 5 years of professional experience developing data science or machine learning products, from initial research through production deployment.
• Strong programming skills and a commitment to writing clean, maintainable, reproducible, and well-tested code.
• Strong hands-on experience with Python, Spark, Hadoop, Airflow, Docker, and SQL.
• Proven experience working with algorithms designed for sparse and large-scale datasets, including prediction, clustering, and outlier detection.
• Practical experience developing neural network-based solutions for classification, regression, multi-task learning, or related applications is highly valuable.
• Knowledge of reinforcement learning and large-scale optimization is a significant advantage.
• Good understanding of SQL and dashboards for developing, monitoring, and improving data science and machine learning systems.
• Strong communication and collaboration skills, with the ability to work effectively alongside data scientists, analysts, and engineering teams.
• A pragmatic, experimentation-oriented mindset and the ability to focus machine learning work on measurable product and business outcomes.
• Previous professional experience in AdTech is required, ideally including exposure to mobile app advertising technology.

Benefits

• Direct collaboration with founders and the opportunity to make a meaningful impact on products and business direction.
• Strong opportunities for career development, learning, and professional growth.
• The chance to work alongside experienced industry specialists and entrepreneurs in a rapidly evolving technology sector.
• A diverse, multinational, and distributed team working across Europe, North America, Asia, and other regions.
• Flexible work-from-home arrangements.
• Opportunity to relocate to an international office in Berlin.
• $500 home-office setup budget.
• $1,000 annual learning and development budget.