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Alex Sinner

@sinner.lu
108 followers 140 following 47 posts

Human. Likes Graphic Novels, Metal, and Cheese. Professional Geek no longer at AWS. From Luxembourg. Opinions my own.

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Reposted by Alex Sinner
Melanie Mitchell @melaniemitchell.bsky.social · 08/09/2026
Hey @ericlipton.nytimes.com 👋 AI is not “evolving” on its own. *People* are choosing how to build it. *People* are choosing how to train it. *People* are choosing how to run it. Maybe the problem is that they are the *wrong people* to make these choices.
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Reposted by Alex Sinner
Seb in the cloud ☁️ @sebsto.bsky.social · 24/08/2026
20 years ago today, AWS announced Amazon EC2 (beta). 🎂 "Resizable compute capacity in the cloud... pay only for capacity you actually use." That one sentence in 2006 reshaped the entire industry. Happy 20th, EC2. ☁️🚀 #AWS #EC2 #CloudComputing
Celebratory illustration for 20 Years of Amazon EC2: a large golden number 20 wrapped in orange and white clouds, glowing server instances rising like birthday candles on a circuit-board landscape, in AWS orange and navy with confetti. Text reads Happy 20th Birthday, EC2.
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Alex Sinner @sinner.lu · 11/12/2025
I did not manage to finish part 2 of either Day 9 or 10 of #AdventofCode, so decided to come back to parts 2 after Dec12... Finished part 1 for day 11, and have another concept of a plan on how to solve part 2. Let's see if it works out better than in the past 2 days 😵‍💫
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Alex Sinner @sinner.lu · 08/12/2025
I just completed "Playground" - Day 8 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/8 Properly reading and understanding the problem statement helped ;-)
adventofcode.com
Day 8 - Advent of Code 2025
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Alex Sinner @sinner.lu · 07/12/2025
I just completed "Laboratories" - Day 7 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/7 Part 1 was easy, but led me down some dead ends for part 2 until I realized there was a much simpler and faster way...
adventofcode.com
Day 7 - Advent of Code 2025
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Alex Sinner @sinner.lu · 06/12/2025
I just completed "Trash Compactor" - Day 6 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/6 Part 1 was straightforward, part 2 once I understood the problem statement
adventofcode.com
Day 6 - Advent of Code 2025
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Alex Sinner @sinner.lu · 05/12/2025
I just completed "Cafeteria" - Day 5 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/5 This one was a bit painful, but no pain no gain! #AdventofCode
adventofcode.com
Day 5 - Advent of Code 2025
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Alex Sinner @sinner.lu · 04/12/2025
I just completed "Printing Department" - Day 4 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/4 It helped to have a matrix helper class from last year's AoC :)
adventofcode.com
Day 4 - Advent of Code 2025
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Alex Sinner @sinner.lu · 03/12/2025
I just completed "Lobby" - Day 3 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/3 With the right approach, this one was reasonably straightforward. :)
adventofcode.com
Day 3 - Advent of Code 2025
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Alex Sinner @sinner.lu · 03/12/2025
I just completed "Gift Shop" - Day 2 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/2 I did not manage to finish yesterday, but slowly getting back up to speed. This year I am also publishing my code on GitHub github.com/alexsinner/a...
adventofcode.com
Day 2 - Advent of Code 2025
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Alex Sinner @sinner.lu · 01/12/2025
It is that time of the year again :) #AdventofCode I just completed "Secret Entrance" - Day 1 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/1
adventofcode.com
Day 1 - Advent of Code 2025
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Alex Sinner @sinner.lu · 27/11/2025
I wrote about my experiment building my new blog with Kiro: alex.sinner.lu/2025/11/kiro... TL;DR; - AI assistants are powerful, but lack judgment - Engineering discipline matters more with AI, not less -Developers need broader skills: architecture, product thinking, and project management
alex.sinner.lu
Kiro First Impressions
Building a production website with Kiro's AI coding assistant: lessons learned, limitations encountered, and mitigation strategies that worked.
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Alex Sinner @sinner.lu · 19/11/2025
I just published my first article on my new personal blog where I will share my reflections, observations, and insights after leaving AWS and Amazon after 17+ years. alex.sinner.lu/2025/11/clar...
alex.sinner.lu
Clarity of Vision, Sponsorship, Execution
Three critical factors determine initiative success: clarity of vision, strong sponsorship, and effective execution. Learn how to avoid common failure patterns.
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Alex Sinner @sinner.lu · 22/07/2025
RIP Ozzy, Prince of Darkness 😢🦇 Truly a legend who loved his art until the very end. 🤘
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Reposted by Alex Sinner
Rodney Brooks @rodneyabrooks.bsky.social · 21/03/2025
Here is a December survey comparing AI attitudes in C-suite vs non C-suite. The C-suite is for more excited than the other workers at these companies. www.axios.com/2025/03/18/e...
axios.com
AI is "tearing apart" companies, survey finds
Study shows that C-suite execs push AI tools that workers don't want to use.
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Alex Sinner @sinner.lu · 07/01/2025
Is there a term for the opposite of the singularity when humanity achieves superstupidity?
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Alex Sinner @sinner.lu · 31/12/2024
Finished my Lego project for the holidays. These are half the droids you are looking for!
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Reposted by Alex Sinner
Gergely Orosz @gergely.pragmaticengineer.com · 30/12/2024
Anyone saying that GenAI could replace software engineers don't understand how software is created (and operated.) Tool innovations have always make the process of building software faster, cheaper: GenAI and AI agents will also do this. But these are tools and efficiency gains.
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Alex Sinner @sinner.lu · 27/12/2024
Fantastic winter day with Loki in the woods!
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Alex Sinner @sinner.lu · 26/12/2024
Taking a break from #AdventOfCode. I still have some unfinished business, but 45* out of 50 is pretty good for me. I really struggled with 21 (Keypad Conundrum), and somehow failed to get part B of 16 (Reindeer Maze) right. I manually solved 24 part B (Crossed Wires), but not in code. Good fun!
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Alex Sinner @sinner.lu · 23/12/2024
I just completed "LAN Party" - Day 23 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/23 This one was surprisingly easy. But much appreciated so that I can go back to the robots from Day 21 who were giving me nightmares...
adventofcode.com
Day 23 - Advent of Code 2024
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Alex Sinner @sinner.lu · 22/12/2024
I just completed "Chronospatial Computer" - Day 17 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/17 Finally solved the second part of Day 17. It turned out the solution I did not believe would work actually worked...
adventofcode.com
Day 17 - Advent of Code 2024
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Alex Sinner @sinner.lu · 22/12/2024
I just completed "Monkey Market" - Day 22 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/22 Where the difficulty was not the coding part, but making sense of the 'bananas' description
adventofcode.com
Day 22 - Advent of Code 2024
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Alex Sinner @sinner.lu · 20/12/2024
I just completed "Race Condition" - Day 20 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/20 Interesting change of perspective for part 2. But I remain confused about the example provided being inconsistent with the description (and the solution)
adventofcode.com
Day 20 - Advent of Code 2024
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Alex Sinner @sinner.lu · 19/12/2024
I just completed "Linen Layout" - Day 19 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/19 It helps to remember things in memory...
adventofcode.com
Day 19 - Advent of Code 2024
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Alex Sinner @sinner.lu · 18/12/2024
I just completed "RAM Run" - Day 18 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/18 Luckily this was a bit easier than the previous days. Would have been faster if I managed to properly copy paste the correct value of the part 2 solution...
adventofcode.com
Day 18 - Advent of Code 2024
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Alex Sinner @sinner.lu · 17/12/2024
Completed part 1 for each of day16 and 17 #Adventofcode. Backlog for part 2 will have to wait until the WE
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Alex Sinner @sinner.lu · 15/12/2024
I just completed "Warehouse Woes" - Day 15 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/15 Slowly learning how to visualize things in order to debug...
adventofcode.com
Day 15 - Advent of Code 2024
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Alex Sinner @sinner.lu · 14/12/2024
I just completed "Restroom Redoubt" - Day 14 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/14 I found the tree!
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Alex Sinner @sinner.lu · 14/12/2024
I just completed "Claw Contraption" - Day 13 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/13 solved through equations after a first misguided attempt with an A*-inspired (or uninspired) approach
adventofcode.com
Day 13 - Advent of Code 2024
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Alex Sinner @sinner.lu · 13/12/2024
I just completed "Plutonian Pebbles" - Day 11 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/11 Finally completed this one. Tricky to think of the correct mental model for the right data structure. But sleeping on problems helps, the brain keeps processing ;-)
adventofcode.com
Day 11 - Advent of Code 2024
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Alex Sinner @sinner.lu · 12/12/2024
I just completed "Garden Groups" - Day 12 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/12 This one was tricky to avoid all kinds of weird implementation errors. Still need to get back to Day 11 part 2 which I did not finish yet...
adventofcode.com
Day 12 - Advent of Code 2024
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Alex Sinner @sinner.lu · 10/12/2024
I just completed "Hoof It" - Day 10 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/10 Where my initial solution to part 1 was the solution to part 2 😅
adventofcode.com
Day 10 - Advent of Code 2024
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Alex Sinner @sinner.lu · 09/12/2024
I just completed "Disk Fragmenter" - Day 9 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/9 yay Monday mornings
adventofcode.com
Day 9 - Advent of Code 2024
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Alex Sinner @sinner.lu · 08/12/2024
I just completed "Ceres Search" - Day 4 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/4 Wrapping up AoC for the first week 💪
adventofcode.com
Day 4 - Advent of Code 2024
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Alex Sinner @sinner.lu · 08/12/2024
I just completed "Bridge Repair" - Day 7 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/7 And now also quickly finished part 2 - which was very quick once I looked at it :P
adventofcode.com
Day 7 - Advent of Code 2024
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Alex Sinner @sinner.lu · 08/12/2024
I just completed "Resonant Collinearity" - Day 8 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/8 Part 2 was surprisingly easy today:) Now I can catch up on past days where I did not finish yet...
adventofcode.com
Day 8 - Advent of Code 2024
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Alex Sinner @sinner.lu · 06/12/2024
I just completed "Guard Gallivant" - Day 6 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/6 Time to create a dedicated matrix class and brush up on how python manages reference assignments vs deep copies...
adventofcode.com
Day 6 - Advent of Code 2024
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Alex Sinner @sinner.lu · 05/12/2024
I just completed "Print Queue" - Day 5 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/5 yes, I have not completed day 4 yet, but there are only so many hours in a day...
adventofcode.com
Day 5 - Advent of Code 2024
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Reposted by Alex Sinner
Werner @wernervogels.bsky.social · 05/12/2024
Technology is evolving to tackle humanity's hardest problems. From clean energy innovations and disaster preparedness to tools to fight disinformation, success now means making a positive impact. Read my tech predictions for 2025 and beyond: www.allthingsdistributed.com/2024/12/tech...
allthingsdistributed.com
Tech predictions for 2025 and beyond
We've entered an era of unprecedented societal challenges and rapid technological advancements. Harnessing technology for good has become both an ethical imperative and a profitable endeavor. These ar...
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Alex Sinner @sinner.lu · 03/12/2024
I just completed "Mull It Over" - Day 3 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/3 regex FTW :)
adventofcode.com
Day 3 - Advent of Code 2024
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Alex Sinner @sinner.lu · 02/12/2024
I just completed "Red-Nosed Reports" - Day 2 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/2 yay
adventofcode.com
Day 2 - Advent of Code 2024
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Alex Sinner @sinner.lu · 01/12/2024
It's that time of the year again :) adventofcode.com/2024/
adventofcode.com
Advent of Code 2024
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Alex Sinner @sinner.lu · 15/11/2024
Learn from the past. Live in the present. Invest in the future.
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Alex Sinner @sinner.lu · 07/11/2024
I guess we landed in the timeline where Spock is evil 😰
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