Arvid Berndtsson
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python

7 items tagged with python

Blog (3)

Apr 5, 2025

When PyPI Becomes the Attack Vector: 39,000+ Downloads of Malicious Python Packages

Three Python packages made it onto PyPI, stole data, validated stolen credit cards, and were downloaded over 39,000 times. Here’s how they worked and what we can learn from it.

Nov 3, 2024

What are TCP Listeners and Streams? (Beginner's Guide)

Discover how popular chat apps like WhatsApp and Discord communicate behind the scenes using TCP. This beginner-friendly guide explains TCP Listeners and Streams using simple analogies and practical Python examples you can try yourself.

Aug 15, 2024

Green Code for Beginners

Discover how to write green code with practical Python techniques that reduce your software's environmental impact.

Experiences (4)

  1. Sep 2024 to May 2025

    Teaching Assistant (Amanuens) - Programming & Web Development

    Malmö University

    Focus: teaching, web development, python, security, mentoring

  2. Mar 2023 to Jan 2024

    Co-founder & Developer

    Merely Emissions (Self-employed)

    Focus: api, product, security, python

  3. Jan 2023 to May 2025

    Software Developer

    Vertiseit Group

    Focus: angular, dotnet, python, graphql, devsecops, cloud security

  4. Oct 2021 to Jan 2023

    Junior Software Developer

    Vertiseit Group

    Focus: web development, angular, dotnet, python, graphql

Arvid Berndtsson

I help companies build practical security programs and reliable software. Focus areas: ISO 27001, SOC 2, secure development, incident readiness, AI governance, and modern web apps.

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