---
title: 'Senior Data Scientist, Marketing (d/f/m) at Taxfix'
canonical: 'https://feeny.ai/job/senior-data-scientist-marketing-d-f-m-taxfix-berlin-prym7km1afed'
type: 'job'
last_seen: '2026-10-12'
---

# Senior Data Scientist, Marketing (d/f/m) at Taxfix

- **Company:** Taxfix
- **Location:** Berlin, Germany
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-09-25
- **Last confirmed live:** 2026-10-12
- **Apply:** https://jobs.ashbyhq.com/taxfix.com/73057496-4721-41ee-b79a-55e67755ee58/application

**Skills:** Marketing Analytics, Data Modeling, Attribution Models, Marketing Mix Modeling (MMM), Incrementality Testing, Statistical Modeling, Machine Learning, Regression Analysis, Bayesian Methods, Classification, Clustering, Forecasting, Causal Inference, Experimentation Design, SQL, Python, dbt, Looker, BI Tools, Offline/brand measurement (TV, CTV, podcast)

> The Senior Marketing Data Analyst transforms data into strategies to fuel growth by applying advanced analytics and AI to influence CLV, CAC, and revenue outcomes. This role involves designing measurement frameworks, running statistical models, and partnering with cross-functional teams to drive data-driven decision...

## Job description

Our story: Every year millions of people are either filing their taxes in fear or giving up on their tax refund altogether. We're working on fixing that. Our intuitive app enables anyone, regardless of education or background, to file their taxes with newfound confidence. Spread across Germany, Spain and the UK, the team at Taxfix Group with its brands Taxfix, Steuerbot and TaxScouts, is a compassionate group of solution-finders. We speak our minds openly, and with over 400 professionals, including tax experts, developers, and IT security experts, we're rich in ideas and voices. The group has facilitated more than 3.5 billion euros in tax refunds for its customers since its founding in 2016.

Why this role, why now? Our data infrastructure and marketing foundations are already in place. We run a large marketing budget across competitive digital channels and our stakeholders are data-driven - they run experiments and dig into data themselves. What's missing is the rigorous scientific layer that connects attribution, MMM and incrementality testing into one coherent, automated measurement framework. You will own that build.

Your challenge: Join our Marketing Analytics team as a Senior Data Scientist, where your mission is to build the measurement and modeling capability that decides how we grow. You will own how Taxfix measures marketing causally and turn that into production models that directly shape CLV, CAC, and revenue. Your output is durable measurement infrastructure and models that the Growth Marketing, CRM, and MarTech teams rely on every day to scale efficiently in competitive markets.

Your responsibilities and decisions:

- Design and run experiments as a discipline. Geo tests and incrementality studies are your primary instrument for establishing what actually drives growth. You’ll focus on a full cycle from choosing the design to reading the result and turning it into a spend decision.
- Advance our steering mechanisms (regression, Bayesian inference, causal inference) turning open-ended budget questions into clear decision framework that increases CLV and reduces CAC.
- Own and advance our marketing measurement stack (attribution, MMM, incrementality testing, brand tracking) and set the standard the marketing organisation uses to make budget, channel-mix, and retention decisions.
- Build production-grade models (CLV, demand forecasting) that feed live decisions such as budget allocation and channel mix - not one-off analyses.
- Communicate results persuasively to technical and non-technical stakeholders and drive adoption of recommendations across Marketing.
- Bring AI-native analytics workflows (agentic data exploration, LLM-assisted causal analysis) into the team's everyday practice.

Your profile:

Must have

- 5+ years in data science or analytics, ideally with exposure to marketing or growth contexts.
- Strong statistical and causal inference foundation: regression, Bayesian methods and especially incrementality testing. You can design a test from scratch: pick the unit of randomisation, reason about power and minimum detectable effect, and defend the runtime with more than intuition.
- Deep understanding of marketing attribution - not just channel mechanics. You understand what a multi-touch model can and cannot tell you and how to triangulate attribution against incrementality reads.
- Advanced SQL and Python; comfortable working with sparse, high-dimensional advertising data.
- Hands-on experience with AI-driven workflows: prototyping with LLMs (e.g. Claude Code, Gemini CLI), automating pipelines (e.g. LangChain, n8n), or AI-powered IDEs (e.g. Cursor).
- Proactive and outcome-driven - someone who picks up a project and drives it fully, from data pipeline to business recommendation.

## Nice to have

- Experience with Marketing Mix Modelling (MMM). Formal MMM experience is a bonus, but what actually matters is that you understand the regression underneath it.
- Machine learning experience (classification, clustering, forecasting, CLV prediction) - strong plus, not a blocker.
- Dbt for data modelling
- Familiarity with BI tools such as Looker.

Soft skills we're looking for

- Ownership and proactivity - someone who suggests new projects and expands scope, not just executes assigned work.
- Ability to ideate and learn quickly in unfamiliar domains (we don't need a marketer; we need a scientist who can quickly grasp marketing measurement logic).
- Strong stakeholder management and communication skills - able to bridge technical results and business decisions for both analyst and executive audiences.

The team:

- You will join a small, high-impact team: one senior data scientist, one mid-level data scientist, one analytics engineer, and the hiring manager. Small team, large mandate.

Why Taxfix?

- A chance to do meaningful, people-centric work with an international team of passionate professionals.
- Holistic well-being with free mental health coaching sessions.
- A monthly allowance to spend on an extensive range of services that you can use and roll over as flexibly as you like.
- Employee stock options for all employees—because everyone deserves to benefit from the success they help to create.
- 30 annual vacation days and flexible working hours.
- Work from abroad for up to six weeks every year. Just align with your team, and then enjoy your trip.
- Plenty of opportunities to socialise as a team. In addition to internal tech meetups, our international team hosts regular get-togethers—virtually and in person when possible.
- Free tax declaration filing, of course, through the Taxfix app—and internal support for all personal tax-related questions.
- Have a four-legged friend in your life? We’re happy to have dogs join us in the office.

Excited? So are we. Learn more about [Team Taxfix](https://medium.com/taxfix) on our blog and get a glimpse of our culture.

At Taxfix, we believe that incredible things happen when you have a wealth of perspectives and experiences. We're proudly committed to equal employment and development opportunities no matter your gender, race, religion, age, sexual orientation, colour, disability, or place of origin. To help mitigate any potential unconscious biases, we ask that you refrain from including your picture, age, or marital status on your CV. Let your experiences speak for themselves.

Not sure if you meet all the requirements for this role? Please apply anyway. You might bring something special to the team that we hadn't considered previously.

## About Taxfix

## Company Overview
- **One-liner**: Taxfix is Europe’s leading AI-native digital tax platform that simplifies tax filing for individuals across Germany, the UK, and Spain.
- **Entity Type**: Private (Late Stage) – Over €330 million in total funding from top-tier investors.
- **Headquarters**: Berlin, Germany (with offices in Madrid, London, Fellbach/Stuttgart, and Tallinn)
- **Founded**: 2016
- **Founders**: Not publicly available in provided sources (CEO Martin Ott and CPO Mohamed Omaizat lead the company)

## Core Business
- **Primary industry**: Fintech / Digital Tax Solutions
- **Target customers**: B2C – individuals, employees, students, parents, and freelancers who need help filing taxes.
- **Mission/purpose**: “Enable financial participation for everyone” and “fix finance for all” – making tax filing simple, accurate, and stress-free.

## Products & Services
- **Taxfix Platform (Self-Service & Assisted)**: A mobile and web application that uses AI and real tax experts to guide users through filing their tax returns. In Germany, users can file fully DIY or with expert assistance; in the UK and Spain (formerly TaxScouts, now rebranded to Taxfix), the service connects users with accredited accountants. The platform is designed to adapt to different life moments and local tax complexities.

## Market Standing
- **Valuation**: Not disclosed
- **Key Metric**: Total funding of over €330 million (as of 2025) [[taxfix.de](https://taxfix.de/en/about-us/)]
- **Notable Investors**: Index Ventures, Valar Ventures, Creandum, Redalpine, OTPP (via TVG) [[taxfix.de](https://taxfix.de/en/about-us/)]
- **Growth Signals**:
  - Over 8 million tax submissions handled across Germany, the UK, and Spain [[taxfix.com](https://taxfix.com/en-uk/about/)]
  - Over €4.5 billion recovered for customers [[taxfix.de](https://taxfix.de/en/about-us/)]
  - Rated “Excellent” (4.8/5) from 6,500+ Trustpilot reviews [[taxfix.com](https://taxfix.com/en-uk/about/)]
  - 400+ employees across five offices [[taxfix.de](https://taxfix.de/en/about-us/)]
  - Rebranded TaxScouts to Taxfix in 2024/2025, unifying the brand across Europe [[taxfix.com](https://taxfix.com/en-uk/about/)]
  - Clear path toward profitability, backed by strong investor confidence [[taxfix.de](https://taxfix.de/en/about-us/)]

## Competitive Advantages
- **AI-native technology**: AI is embedded in the core product and operations, not an add-on, enabling scale and personalization.
- **Hybrid human + AI model**: Combines intelligent automation with a network of 150+ accredited accountants, ensuring accuracy and trust.
- **Pan-European presence**: Operating in three major markets (Germany, UK, Spain) with localized solutions, giving a scale advantage over local-only competitors.
- **Strong brand and user trust**: High ratings and millions of filings create a virtuous cycle of credibility and word-of-mouth growth.
- **Deep investor backing**: Over €330M in funding from top VCs provides a long runway and resources for expansion.

## Strategic Focus
- Continue scaling across Europe, leveraging AI to improve product efficiency and user experience.
- Unify the brand under Taxfix after the TaxScouts rebrand, strengthening market position in the UK and Spain.
- Drive toward profitability while maintaining growth and investing in technology.
- Expand the assisted product offering and deepen partnerships with accountants and financial institutions.

## Why Work Here
- **Culture**: Open, inclusive, and collaborative. Employee Resource Groups include the Lavender Circle (LGBTQ+) and Women at Taxfix. The company actively embeds diversity, equity, inclusion, and belonging into the employee journey [[taxfix.de](https://taxfix.de/en/careers/)].
- **Work model**: Hybrid setup – employees can choose remote or work from vibrant offices in Berlin, Madrid, London, Fellbach/Stuttgart, or Tallinn. 30 days of annual working abroad + 30 days of annual vacation allowance [[taxfix.de](https://taxfix.de/en/careers/)].
- **Professional development**: Annual learning budget, unlimited LinkedIn Learning access, workshops, and training tailored to individual goals [[taxfix.de](https://taxfix.de/en/careers/)].
- **Compensation & ownership**: All employees receive a stake in the company through a Virtual Stock Option Plan (VSOP) [[taxfix.de](https://taxfix.de/en/careers/)].
- **Wellbeing**: Mental health resources, wellness sessions, and up to 10 free therapy sessions per year via Nilo [[taxfix.de](https://taxfix.de/en/careers/)].
- **Impact days**: Two paid days per year for volunteering with causes employees care about [[taxfix.de](https://taxfix.de/en/careers/)].
- **Onboarding**: A four-day program introducing new joiners to the mission, culture, and ways of working [[taxfix.de](https://taxfix.de/en/careers/)].
- **Company language**: English is the official company language, making it accessible to international talent [[taxfix.de](https://taxfix.de/en/careers/)].

## Sources
1. [taxfix.de - Careers](https://taxfix.de/en/careers/)
2. [taxfix.de - About Us](https://taxfix.de/en/about-us/)
3. [taxfix.com - About (UK)](https://taxfix.com/en-uk/about/)
4. [LinkedIn - Taxfix SE](https://de.linkedin.com/company/taxfix)
5. [jobs.ashbyhq.com - Taxfix Open Positions](https://jobs.ashbyhq.com/taxfix.com)

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