Daniel Hoelzgen

@dhoelzgen.dev

#ElixirLang and #Ruby Lead Developer at 9elements, an agency for outstanding digital products. Focused on Artificial Intelligence, Logic, and Data Visualization.

Thank you, this means a lot to us. Elixir has been steadily becoming a bigger part of what we do at 9elements, and that growth has been shaped by the openness and warmth of the BEAM community. We are glad we can support this awesome community by sponsoring Code BEAM Europe!

Code BEAM@codebeam.bsky.social · 6mo ago

Please welcome 9elements to Code BEAM Europe 2026! We are so excited to have them on board as our official Lanyard Sponsor for Haarlem. Thank you to the entire 9elements team for championing the BEAM ecosystem and helping make this event possible. Check out them at: 9elements.com

I am proud that @9elements.com is sponsoring ElixirConf EU this year! For us, ElixirConf is one of the most important gatherings in the Elixir ecosystem. The talks are inspiring, and the community is genuinely one of the friendliest in tech. Can't wait to be part of it. #ElixirConf #ElixirLang

ElixirConf@elixirconf.bsky.social · 8mo ago

Excited to announce @9elements.com as our Lanyard Sponsor for ElixirConf EU 2026! Thank you for supporting the community! www.elixirconf.eu#sponsors

usage_rules now supports copying skills from your packages in addition constructing skills from the usage rules files 😎 Package authors can now provide entire skills for your project, and when you update your dep you can get the new version of the skill! #ElixirLang

Bild

I am pleased to share that @9elements.com is sponsoring @codebeam.bsky.social Europe 2025! As we continue strengthening our focus on Elixir, Phoenix, and Ash, it feels great to also deepen our role in this wonderful community. Looking forward to meeting many of you in Berlin!

Code BEAM@codebeam.bsky.social · last yr.

🎉 Proud to announce 9 Elements as a lanyard sponsor for Code BEAM Europe 2025! They develop tailor-made software solutions combining craftsmanship with innovative design. Thanks for supporting the BEAM community! codebeameurope.com#sponsors

Grateful that our first @elixir-ruhr.dev meetup brought together so many people - Our local community feels stronger than ever! Had a lot of fun talking about @ash-hq.org. A big thank you to @discord.com for saving the day when streaming didn’t go as planned. Join us here: discord.gg/TRqQcxRMjq

Join the Elixir Ruhr Discord Server!

lixir Ruhr is a welcoming meetup for everyone excited about Elixir, Erlang, and the BEAM community. All experience levels are welcome! | 22 members

discord.gg

As AI redefines software development, this post by @ichimnetz.com stands out; tracing how automation shifts value from craft to concept, from 19th-century painting to today’s programming. Appreciate he draws thoughtful parallels without pretending to predict where it all leads.

Nils Binder@ichimnetz.com · last yr.

There was a time when anyone could be an artist 👨‍🎨 — if they loved the work enough. Then came the professionals. Then came the camera. Today, it’s not paint that’s being replaced. It’s code. 9elements.com/blog/when-sk...

#ElixirConf 2025 was absolutely wonderful. First one since 2017, and the community is still just as great, lovely, and open. Tons of inspiring talks and conversations, can’t wait to try Ash AI! See you at the next one, hopefully not in another 7 years.

Bild

If you need your LLM to follow instructions better, try GPT-4.1. I’m building a chatbot with more complex behavior and struggled to get 4o to follow instructions properly. Switching to 4.1 fixed it, even without gimmicky styles to signal what's important.

This morning, I talked with my daughter about weekdays - specifically, what day it will be after a given number of days. I explained that adding multiples of seven doesn’t change the weekday, only the remainder matters. Not the easiest concept for a four-year-old.

A digital interface displays a ‘Weekdays’ calendar with a colorful and playful design. The top section includes a row of buttons representing days of the week, each paired with an emoji (e.g., a moon for Monday, fire for Tuesday, water drop for Wednesday). Below, a number input with plus and minus buttons allows for selecting a numerical value, currently set to 15. The lower section presents a calendar-like grid with labeled weekdays and corresponding numbers. Some days are highlighted in different colors, such as Friday (yellow) and Saturday (pink). An arrow and emojis (a sprout and a rainbow) suggest a transformation or mapping concept. The overall aesthetic features soft purple tones with bold, rounded typography.

Yesterday, I released a tiny MCP server that allows Cursor Editor to get up-to-date version information for external Hex dependencies. Someone suggested doing a version for #RubyOnRails, so I built a more generic version that supports Ruby Gems, Hex, PyPI, and NPM. dep-mcp.9elements.com

Package Version MCP Server - For AI Tools

Help AI tools like Cursor to automatically use the correct package versions when adding dependencies to your projects. Supports Hex, RubyGems, and NPM packages.

dep-mcp.9elements.com