Senior AI Engineer / Data Scientist

Summary

As a Senior AI Engineer / Data Scientist at Effektify, you’ll play a key role in developing AI and ML capabilities by building and improving data infrastructures, designing models, and creating AI features that enhance marketing insights and actions. Key skills include 3+ years of experience in AI or data science, strong proficiency in Python and SQL, and familiarity with ML frameworks like PyTorch or TensorFlow. Understanding statistics and machine learning fundamentals is essential, along with fluency in English. Perks include working in a flexible, collaborative team environment with opportunities to influence solutions and technical direction.

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Description

Lund / Halmstad

• Hybrid
• Data/Engineering

At Effektify, we help companies make better marketing decisions by turning complex data into clear insights and useful actions. We are now looking for a Senior AI Engineer / Data Scientist to join our AI team and help build the next generation of AI and ML capabilities in the platform.

About The Role

This is a senior, hands-on role across AI Engineering and Data Science, where you will work closely with Max, our AI Lead, and Martin, our CTO, in a small team with broad scope and a high degree of ownership.

You will work end-to-end, from data and ML infrastructure to modeling, experimentation, evaluation, and product-facing AI features.

What You Will Work On

Your work will include a mix of:

• Building and improving data and ML infrastructure as data volumes and use cases grow
• Designing, testing, and refining models, algorithms, and decision logic used in the product
• Developing AI features and agent-based workflows that turn connected data into clearer recommendations, insights, and next steps
• Working with data from ad platforms, analytics tools, e-commerce systems, and financial systems
• Taking ideas from exploration to production together with product and engineering

Examples of projects and focus areas

In the first phase, your work may include areas such as:

• Recommendation features based on connected performance data Build functionality that uses campaign, conversion, sales, and business data to surface clearer recommendations on what to prioritise, investigate, or act on next.
• Detection of shifts, anomalies, and performance drivers Improve how the platform identifies meaningful changes, ranks what matters most, and helps users understand why performance is moving.
• Agent-based workflows for insight automation Build systems that combine platform data, AI models, and product logic to automate parts of the insight work and help users move faster from data to action.

About The Team And Work Culture

You will join a small AI team, which means short paths, broad scope, and plenty of room to shape both solutions and technical direction.

A large part of the broader tech team is based in Halmstad (our HQ), while Max is based in Lund. For that reason, Halmstad and Lund are especially relevant locations for this role. At the same time, we are flexible around remote and hybrid setup.

At Effektify, we value clear thinking, low prestige, and useful discussions. We care about quality, progress, and building things that hold up in practice.

Who we are looking for

Required

• 3+ years of experience in AI, machine learning, data science, or closely related work
• Strong skills in Python and SQL
• Experience with one or more ML frameworks such as PyTorch or TensorFlow
• Experience building and shipping AI, ML, LLM, or agent-based functionality in production
• Strong understanding of statistics and machine learning fundamentals
• Comfortable working with Git
• Fluent English, written and spoken

Preferred

• A Master’s degree in mathematics, physics, machine learning, computer science, or a related field
• Experience working with marketing, e-commerce, or other high-volume behavioural data
• Experience with AWS
• Experience with Snowflake or modern data warehousing
• Experience with TypeScript or JavaScript
• Swedish language skills
• Experience from a startup, scale-up, or other growth-stage environment, or a strong interest in working in that kind of setting

More about Effektify

Effektify (www.effektify.com) is a profitable scale-up with 50+ employees and 400+ customers. Since 2021, we have grown from a small founding team into a multi-office company with strong momentum, a working product, and a lot of room to shape what comes next.

At Effektify, we help companies understand what drives marketing performance and what to do next.

Our platform brings together data from sources such as Google, Meta, LinkedIn, TikTok, analytics tools, Shopify, WooCommerce, and financial systems. That creates a rich data environment across spend, traffic, conversion, revenue, and business performance.

For you, that means access to large and varied datasets, connected across several domains, and a chance to work on technically demanding problems with clear business relevance. It also means building product features where improvements can quickly reach customers and make a visible difference.

Practical details

• Location: Flexible hybrid setup, with a preference for Lund or Halmstad. We also have offices in Stockholm, Gothenburg, and Jönköping
• Employment type: Full-time, permanent
• Salary: Fixed market-rate salary
• Start date: By agreement

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For questions, feel free to email martin.lundin@effektify.com.