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Mark F.MF

Mark F.

Data Scientist, Senior software developer

€450/day
Hamburg, DE
15+ years

Average response time: 1 hour

About Mark

Senior Software Engineer (Python/Rust) • Data Engineering • BigQuery/ETL • End-to-end analytical systems



„Ich helfe Unternehmen, datengetriebene Lösungen und robuste Software schneller in die Realität zu bringen — pragmatisch, zuverlässig und mit starkem technischen Fundament.“

Als freiberuflicher Senior Software & Data Engineer unterstütze ich Teams dabei, Daten besser nutzbar zu machen und gleichzeitig saubere, wartbare Software zu entwickeln. Ich kombiniere tiefe Programmiererfahrung (Backend, Datenmodelle, APIs, Automatisierung) mit analytischem Denken und einem klaren Blick für Business-Impact.

Wobei ich konkret unterstütze:
• Entwicklung stabiler Backend-Services (Java/Kotlin, Python, ClojureScript etc.)
• Aufbau von Datenpipelines, ETL/ELT-Prozessen und Reporting-Strukturen
• Explorative Analysen, KPI-Definition, Entscheidungsgrundlagen
• Modellierung komplexer Datendomänen, Aufräumen historisch gewachsener Systeme
• Automatisierung wiederkehrender Abläufe und Integration heterogener Datenquellen

Was mich auszeichnet:
Ich arbeite wie ein erfahrener Generalist: tief technisch, sehr eigenständig, mit sauberem Code und Fokus auf langfristige Wartbarkeit. Ich kann mich in bestehende Systeme einarbeiten, technische Schulden abbauen und Projekte dort weiterführen, wo andere aufgeben. Gleichzeitig kommuniziere ich klar, realistisch und ohne Buzzwords.

Typische Projektergebnisse:
• Robuste Services, die langfristig laufen, statt fragile Workarounds
• Transparente Reporting-Landschaften und zuverlässige BI-Pipelines
• Deutlich weniger manuelle Arbeit durch Automatisierung
• Komplexe Legacy-Bereiche werden strukturiert, dokumentiert und stabilisiert
• Daten, die tatsächlich genutzt werden — nicht nur gespeichert

Wenn Sie einen Freelancer suchen, der Softwareentwicklung auf Senior-Niveau mit starker Datenkompetenz verbindet und schnell echten Mehrwert liefert, freue ich mich auf eine Nachricht.
  • English

    Native or bilingual

  • German

    Fluent

  • French

    Basic

Remote only
Primarily works remotely

Experience

  • MOIA GmbH,
    Data Scientist (Transportation-modeling)
    AUTOMOBILE
    January 2024 - Today (2 years and 6 months)
    Hamburg, Germany
    I currently work in the strategy department, the team
    (Mobility Consulting) focuses on providing SaaS products and consultation relating to agent-based simulations. Clients include cities, local governement authorities, and private enterprises.

    Technologies: Java, Data Analysis, Python, AWS Athena SQL.
    Python (Programming Language) Pandas Java
  • MOIA GmbH.,
    Senior Data Scientist
    AUTOMOBILE
    January 2017 - January 2022 (5 years)
    Hamburg, Germany
    - Hired the initial team of data scientists, BI developer, and data-engineers.
    - Built 1st data warehouse pipeline using python, redshift, AWS lambda, Kinesis.
    - Worked on demand prediction (time-series based python model, etc), fleet rebalancing (OSMNX, non-negative matrix factorization), break planning optimization ( non-linear objective using an open-source JVM-based tool called Optaplanner).
    - We rewrote the optimizer in Rust for performance, which is still the tool of choice at MOIA for optimization work.
    Python (Programming Language) Pandas Statistical Modeling Scikit-learn Amazon Web Services (AWS)
  • E-Farm GmbH.,
    Senior Data Scientist
    E-COMMERCE
    January 2022 - January 2024 (2 years)
    Hamburg, Germany
    E-Farm had just one data science team, managing several data science projects. The most important project was a model for predicting the price of used farm machinery, (a farm-machinery depreciation estimator). The team had already developed a decent, but costly Vertex AI-based ML model. Management wanted something cheaper, simpler, and easier to adjust to different business cases.
    I worked with another data scientist to reverse engineer where most of the model's predictive power came from, and eventually we managed to match the neural net model performance with a (fairly) simple linear model.
    Technologies: Data Science: Python, Pandas, Numpy, Scikit-learn, SpaCy. Infra (GCP): BigQuery (SQL), Vertex AI, Cloud Run, docker, git.
    Hamburg I joined MOIA as they were launching their first test in Hanover. I helped set up the initial DWH in Redshift, hired several data scientists, engineers, and analysts. I then worked on fascinating projects such as: Demand Prediction, Fleet Rebalancing (redistributing vehicles using temporal-spatial demand and supply diffs), Vehicle Supply Optimization (online, local-search based discrete optimization of break locations). I also successfully co-created and pitched a 12 month product development roadmap for the team.
    BigQuery Pandas Python (Programming Language)

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Education

  • Bsc.
    The Open University
    Bsc. Mathematics and Statistics
  • Post-graduate Diploma
    University College Dublin
    2019
    Post-graduate Diploma Data Analytics

Skill set

Categories