Senior Data Scientist

Praxy; Helsinki; Hybrid; EUR 90,000 - 150,000; Full time

Benefits offered by this job

Inclusive culture

Global impact

Wellbeing focus

Equity options

Hybrid workplace

Job summary

Smartly is seeking a Senior Data Scientist to join the AI Platform Team in Helsinki. You will own ML projects end-to-end, from data exploration to production monitoring, and work across image, video, audio, text, and structured data to power advertising experiences.

You will collaborate with data scientists, ML engineers, and software engineers to productionize AI/ML apps, while driving maintainability, observability, and scalability. This is a hybrid role based in Helsinki.

Qualifications

• 5+ years of experience in data science or applied machine learning.
• 2+ years of experience with cloud infrastructure (AWS or GCP).
• Strong foundation in linear algebra, statistics, and calculus.
• Fluent in Python; C++ or Java a plus.
• Hands-on experience with PyTorch or TensorFlow.
• Knowledge of MLOps: MLflow, Kubeflow.
• Experience in feature engineering, model design, evaluation, diagnostics, and monitoring.
• Excellent written and verbal communication in English.

Responsibilities

• Implement, build, and deploy scalable ML models for advertising experiences.
• Own projects end-to-end from problem framing to monitoring in production.
• Work with diverse datasets (image, video, audio, text, structured data).
• Analyze large-scale datasets to uncover insights and inform product strategy.
• Collaborate with data scientists, ML engineers, and software engineers to productionize AI/ML apps.
• Contribute to team planning, retrospectives, and process improvements.
• Communicate findings to both technical and non-technical stakeholders.

Skills

Python

Machine Learning

Cloud AWS/GCP

PyTorch/TensorFlow

MLOps

Data analysis

Communication

English

Education

MSc in relevant field

Tools

MLflow

Kubeflow

Job description

# Senior Data Scientist: Helsinki, Uusimaa, Finland: Jul 14, 2026: Sep 28, 2026## About the roleWe are looking for a Senior Data Scientist to join the AI Platform Team at Smartly! Our team works on helping marketers make the most of their ad creatives (images, video, text) and campaigns (product and performance data). We build and experiment with AI-based solutions across the media and creative workflows. You will have the opportunity to take ownership of and work on high impact projects.Join us in building high impact ML-based solutions to help our customers to build better and more effective advertising experiences for their consumers. If you’re a growth minded individual who has a passion for Data Science and the marketing space, this team is for you!As a Senior Data Scientist, you’ll:* Implement, build, and deploy scalable models and machine learning solutions that enable our users to craft great advertising experiences and campaigns with a focus on maintainability, observability, scalability and stability.* Own projects end-to-end: from problem framing and data exploration to modeling, validation, and monitoring in production.* Work with a large span of datasets from image to video to audio to text to structured performance data.* Analyze large-scale datasets to uncover insights, trends, and opportunities that inform product strategy and customer outcomes.* You’ll work alongside our stellar data scientists, senior machine learning engineers, and software engineers to enable us to productionize AI/ML applications more robustly and efficiently.* Be a core contributor of our team and our ways of working to build high impact products. You’ll actively be involved in work planning, retrospectives, and overall team improvement.* Impact the daily life of the staff of the hundreds of advertisers using Smartly* Work with our stakeholders - be them product, engineering, infrastructure - to ensure we meet customers where they are. Being able to translate business/product needs to viable solutions is a must.* Apply and enhance your soft skills through working closely with your colleagues and our customers. Doing knowledge shares, running productive meetings, and pair programming/debugging are just some ways we grow our soft skills.* Keep up to date with the latest AI innovations, especially in areas such as generative AI, computer vision, natural language processing and explainability.What we are looking for:* 5+ years of experience in data science or applied machine learning* 2+ years of experience working with cloud infrastructure such as AWS or GCP* Strong foundation in linear algebra, statistics, and calculus* Fluent in Python; experience with C++ or Java is a plus* Hands-on experience with modern ML frameworks (e.g., PyTorch, TensorFlow)* Knowledge of MLOps concepts and tools (e.g., MLflow, Kubeflow)* Experience in feature engineering, model design, evaluation, diagnostics, and monitoring* Analytical mindset with a problem-solving approach* Passion for solving customer challenges quickly while making thoughtful architectural decisions* Ability to communicate complex technical findings to both technical and non-technical stakeholders.* Strong written and verbal communication skills in English* M.Sc. in a relevant field is preferred* Ability and willingness to work in a hybrid capacity from our office 3 days a weekWhat We Offer You:* Inclusive Culture: Join a team of over 750 Smartlies representing more than 60 nationalities across 24 locations in 13 countries, we foster a culture built on trust, transparency, and open feedback.* Global Impact: Be part of a company making a global impact, directly influencing our customers and business growth.* Wellbeing Focus: Enjoy generous healthcare packages, mental health services, and a healthy work-life balance with paid holidays and family leave.* Total Rewards: Benefit from equity options, performance-based rewards, competitive compensation, and ample career development opportunities.* Hybrid Workplace: We work in a hybrid model, balancing office and remote work, with the option to work abroad for up to 30 days.Smartly is committed to being the best place to work for growth-minded individuals to thrive - explore more in our Culture Handbook !#LI-OK #LI-Hybrid