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Greg Tielsch

@gtielsch

Proud father, friend of huskies, software architect, domain driven design, CTO @SAP Ariba, views are my own

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18.11.2024
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Latest posts by Greg Tielsch @gtielsch

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I Read All Of Cloudflare's Claude-Generated Commits Max Mitchell's personal portfolio website showcasing his photography, YouTube videos, coding projects, and work history.

Cloudflare open sourced an OAuth library that was almost entirely vibe coded using Claude. They also shared the prompts that led to completed library which is an interesting study.

We’re in a weird intermediate period where you need to know both programming and telling an AI what to program.

07.06.2025 11:54 πŸ‘ 70 πŸ” 11 πŸ’¬ 4 πŸ“Œ 2

Saw him playing in the early nineties and if I recall he played standing also

20.04.2025 20:57 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Tried to reserve 4 seats next to each other for a movie where there were a total of 5 seats remaining free in the row

The web app did not allow booking seats to have an empty seat left so was impossible

But check was on client-side: so I overrode it

Love being a dev sometimes

12.04.2025 11:26 πŸ‘ 255 πŸ” 6 πŸ’¬ 15 πŸ“Œ 1

As a senior dev (300 customer tickets later) I’ve implemented server side business policy firewall in paranoid mode; accepting only inputs in expected attributes and reevaluating all policies affected

12.04.2025 12:20 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

As a teacher of SE I love using the cinema ticket reservation domain as an assignment throughout the course. This edge case here is a good example for customizable business policies and discussing user story goals for different personas (guest vs cinema manager) #DDD

12.04.2025 12:14 πŸ‘ 8 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

As a junior dev I saw this that client-side was assumed β€œsecure”. Try setting price to 0.01.

12.04.2025 12:00 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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I've launched eferro-picks-site: my personal selection of talks on software development Over the years, I've listened to hundreds of talks on software development, product, Lean, Extreme Programming, and related topics. I usuall...

I've launched eferro-picks-site: my personal selection of talks on software development www.eferro.net/2025/04/ive-...

Repost welcome!

#SoftwareDevelopment #XP #Lean #RecommendedTalks #CuratedContent

06.04.2025 10:46 πŸ‘ 18 πŸ” 13 πŸ’¬ 1 πŸ“Œ 1
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Agile Meets Architecture Conference, Day 1 Recap β€” Michael PlΓΆd Day 1 of Agile Meets Architecture in Berlin was a great start to a great conference. Catch my blog post for my personal highlights and insights!

I wrote a blog post summarizing the first day at the Agile Meets Architecture Conference @amaconf.bsky.social There are also some photos in this post. You can read it here:

www.michael-ploed.com/blog/agile-m...

04.04.2025 12:23 πŸ‘ 9 πŸ” 5 πŸ’¬ 0 πŸ“Œ 0

Lovely comment on my piece about hand-drawn illustrations: β€œKeep to a low tech approach to maintain a low barrier to idea flow and capture. Efforts to polish the presentation are better used to polish the idea.”

21.03.2025 21:40 πŸ‘ 48 πŸ” 8 πŸ’¬ 1 πŸ“Œ 0

You told me you collected a few pages to introduce DDD, what a great set of documentation πŸ₯³

18.01.2025 19:35 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

🌍 Proud to unveil SAP’s DDD Knowledge Base! Packed with Strategic Design, Tactical Design, and Event Storming, it’s a treasure for software teams aligning tech with business goals. Explore now: github.com/SAP/curated-...

#ddd #domaindrivendesign #dddcrew

18.01.2025 14:05 πŸ‘ 11 πŸ” 4 πŸ’¬ 1 πŸ“Œ 0

Let’s take a quick look at LOTR from Sauron’s perspective, where it resembles nothing so much as a counter-espionage spy thriller.

12.01.2025 09:14 πŸ‘ 594 πŸ” 246 πŸ’¬ 15 πŸ“Œ 60
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Potential GenAI Impact On DORA Metrics: Five Dimensions Of Value For Developersβ€”Especially Creating Option Value! Having helped establish the DORA metrics a decade ago, Gene Kim explores the puzzling DORA 2024 findings: why did GenAI boost learning and flow, yet decrease stability? I make the claim that we need t...

Must-read: AI copilots as Option Value by the ever-brilliant
@realgenekim.bsky.social

1. Build things faster
2. Tackle more ambitious projects
3. Build things yourself
4. Have more fun
5. Explore more options

Guaranteed return on the ~15 minute investment!

itrevolution.com/articles/gen...

12.01.2025 18:44 πŸ‘ 4 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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Using anti-requirements to find system boundaries We all love building greenfield projects. 1 But inevitably, starting a new project involves lots of meetings with business stakeholders to hash out initial requirements and canonical data models.

Using #antirequirements is a powerful way to increase autonomy by breaking your domain into separate islands that can evolve independently. Learn how to use anti-requirements in your system design in our blog post. https://particular.net/blog/antirequirements

06.12.2024 03:05 πŸ‘ 6 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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Stability ANTI-patterns cheat sheet Popularised by Michael T. Nygard in his seminal work β€œRelease It!: Design and Deploy Production-Ready Software”, Stability Anti-Patterns…

Do you know the 12 Stability ANTI-patterns?

Here is a cheat sheet:
medium.com/@tpierrain/s...

#SRE #architecture #software #design

17.11.2024 09:43 πŸ‘ 22 πŸ” 9 πŸ’¬ 1 πŸ“Œ 0

Hand picked, and you had been among first refollows

27.11.2024 21:49 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Twitter’s heir apparentΒ isn’tΒ X or ThreadsΒ β€”Β it’sΒ Bluesky The blue bird is dead. Long live the blue sky.

Others have noted it but I will too: The big reason Bluesky is so hot right now is that the people who add value to social media - the frequent posters in specific fields - are here now, talking to each other and creating the "spectator value" that draws users and attention.

23.11.2024 18:30 πŸ‘ 55124 πŸ” 6939 πŸ’¬ 919 πŸ“Œ 466
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Some images from the Twitter years in a thread (since they are no longer accessible) 1/n

20.11.2024 02:34 πŸ‘ 265 πŸ” 62 πŸ’¬ 4 πŸ“Œ 6

What a great idea of the DDD community

19.11.2024 14:33 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Hi Bsky!

18.11.2024 22:56 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0