Data Scientist

At Peaks, we're looking for a Data Scientist to join our team.

Do you thrive on analyzing marketing data to unlock valuable insights? Are you passionate about saving, investing, and driving customer engagement? Do you want to make an impact in a fast-growing international scale-up? If so, keep reading—Peaks might be your perfect match!

As a marketing data expert, you’ll optimize ad performance, build attribution models, ensure seamless data integration, refine customer segmentation, and enable impactful A/B testing. You'll play a key role in improving our marketing data architecture with a focus on cost efficiency, speed, and best engineering practices.

About Peaks

We’re Peaks, a fast growing, innovative Dutch fintech scale-up on a mission to help 1 million Europeans build wealth with investing and feel better about their financial future.

We serve these customers with a team of 40 very ambitious talents. To help Peaks fulfil its mission and growth ambitions, we are looking for a (Marketing) Data Scientist.

What you will be doing

You will play a key role in driving our business growth by managing the end-to-end process of data ingestion, modeling, and publication. Your responsibilities will include designing and maintaining scalable data solutions, defining meaningful success metrics, and empowering non-technical team members with user-friendly, self-service analytics tools. You will have to identify and implement solutions to optimize ad networks performance and boost conversion rates throughout the sales funnel.

• Ad Performance Analysis: Create dashboards and reports to measure ad effectiveness, ROAS, CAC, CAC-payback period, and CLV.
• Marketing Attribution: Build models to track customer journeys across multiple channels, such as last-click and multi-touch attribution.
• Data Integration: Ensure marketing platforms like Google Ads, Meta Ads, and CRM systems receive accurate and up-to-date data through ETL/ELT pipelines. Identify improvements and spot tracking issues on app and web across all acquisition channels.
• Customer Segmentation & Audiences: Transform raw data into structured customer profiles, enabling targeted campaigns and lookalike audiences.
• Experimentation & A/B Testing: Provide clean datasets for measuring the impact of different marketing strategies.
• Improve our architecture based on what brings the most impact to cost reduction and speed, applying software engineering best practices.

What you will need to apply

• At least 5 years of engineering experience with an analytical mindset
• Solid understanding of architectures, design principles and engineering best practices
• Experience across all stages of the data pipeline: ingestion, transformations, mart creation
• In-depth technical knowledge of advertising technologies such as Appsflyer, Meta, Google and others
• Experience with our tech stack is a bonus: S3, Redshift, MySQL, Python, Go, Rust
• Knowledge of unit growth metrics
• Live in The Netherlands

What we offer you

• Variable pay in the form of participation in our Peaks Employee Stock Ownership Program
• 30 holidays
• Peaks Employee Pension scheme
• The opportunity to develop yourself quickly within an ambitious and results driven fintech scale-up
• No bureaucratic hassle: a flatter than flat organization and no-nonsense culture
• An international environment with a great team of very talented people
• An office in a prime location in the center of Amsterdam

Why you should apply now

Our culture rewards ownership, excellence, and high energy. We care deeply about outcomes and hold each other accountable - we’re here to win and fix one of the largest challenges Europeans face - closing the pension gap and democratising wealth.