Lennart Franck

I build software for the web and mobile, mostly products that are small, fast, and quietly useful. Lately, more and more of them have a language model somewhere inside.

I studied business informatics and business management in Flensburg, where I wrote my master thesis on using LLMs to automate research. I've been writing software professionally since 2019.

Work

• Activ Digital GmbH2025–now

  Software engineer and AI lead. I shape our Claude Code workflow with custom skills and MCP integrations.

• DiscountableCo-founder

  An accessible app that brings discounts and benefits for people with disabilities into one place.

• DevHelden2024–25

  App development for clients like Snocks, Olakala and Teveo

• Hochschule Flensburg2022–23

  Guest lecturer for Python, OOP and Web Engineering, 70+ students

• Activ Marine GmbH2019–24

  Student software engineer

• Hochschule Flensburg2019–20

  Tutor for programming, algorithms and data structures

Writing

• AI-Assisted Mapping Studies2024

  My master thesis. An LLM tool that automates large parts of systematic mapping studies.

• Testing Machine Learning Systems2023

  A workflow for testing non-deterministic ML systems, from evaluation to monitoring.

Education

• M.Sc. Business Management2021–24

  Universität Flensburg, focused on economics and computer science

• B.Sc. Business Informatics2018–21

  Hochschule Flensburg