<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Hacker News: cfontes</title><link>https://news.ycombinator.com/user?id=cfontes</link><description>Hacker News RSS</description><docs>https://hnrss.org/</docs><generator>hnrss v2.1.1</generator><lastBuildDate>Wed, 20 May 2026 18:56:29 +0000</lastBuildDate><atom:link href="https://hnrss.org/user?id=cfontes" rel="self" type="application/rss+xml"></atom:link><item><title><![CDATA[New comment by cfontes in "Goodbye Visa and Mastercard: 130M Europeans switching to sovereign payment"]]></title><description><![CDATA[
<p>PIX is for everything, but Indeed Tikkie is more a p2p tool.</p>
]]></description><pubDate>Wed, 20 May 2026 13:50:27 +0000</pubDate><link>https://news.ycombinator.com/item?id=48207782</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=48207782</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=48207782</guid></item><item><title><![CDATA[New comment by cfontes in "Goodbye Visa and Mastercard: 130M Europeans switching to sovereign payment"]]></title><description><![CDATA[
<p>PIX from Brazil is even better, to be honest. But this is a big improvement over online CC payment.<p>I lived in the NL and Brazil, so I can compare the two, and while iDEAL is pretty good, PIX is easier to understand, explain, and deal with.<p>PIX has more variants, you can use it for recurrent payment, split payments, financing, cashout and almost all things a CC can do nowadays.<p>I would say Tikkie is almost as good and easy to use as PIX usecase wise but has less adoption and variants, also it belongs to ABN which is completely different from PIX approach.</p>
]]></description><pubDate>Wed, 20 May 2026 13:42:14 +0000</pubDate><link>https://news.ycombinator.com/item?id=48207632</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=48207632</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=48207632</guid></item><item><title><![CDATA[Lawyers in Brazil caught for prompt injection on a legal case]]></title><description><![CDATA[
<p>Article URL: <a href="https://www.jota.info/trabalho/juiz-multa-em-r-84-mil-advogadas-por-prompt-injection-para-manipular-ia-usada-no-trt8">https://www.jota.info/trabalho/juiz-multa-em-r-84-mil-advogadas-por-prompt-injection-para-manipular-ia-usada-no-trt8</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=48182089">https://news.ycombinator.com/item?id=48182089</a></p>
<p>Points: 4</p>
<p># Comments: 0</p>
]]></description><pubDate>Mon, 18 May 2026 16:43:04 +0000</pubDate><link>https://www.jota.info/trabalho/juiz-multa-em-r-84-mil-advogadas-por-prompt-injection-para-manipular-ia-usada-no-trt8</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=48182089</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=48182089</guid></item><item><title><![CDATA[New comment by cfontes in "Show HN: Live Sun and Moon Dashboard with NASA Footage"]]></title><description><![CDATA[
<p>Would be cool to have a I button with explanation of what each of those are.<p>I love it but can't understand their differences without leaving the site and comming back for each.</p>
]]></description><pubDate>Tue, 28 Apr 2026 16:24:42 +0000</pubDate><link>https://news.ycombinator.com/item?id=47936624</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=47936624</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47936624</guid></item><item><title><![CDATA[New comment by cfontes in "Show HN: Modo – I built an open-source alternative to Kiro, Cursor, and Windsurf"]]></title><description><![CDATA[
<p>Can subagents work on multiple branchs at the sametime (in a sandbox or some other way)?<p>This is a major pain atm with any IDE, they all fight over the same git cmd instance and make a mess out of it. I have a custom setup for this but would like some more integrated way of solving this.</p>
]]></description><pubDate>Mon, 06 Apr 2026 11:42:40 +0000</pubDate><link>https://news.ycombinator.com/item?id=47659642</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=47659642</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47659642</guid></item><item><title><![CDATA[New comment by cfontes in "John Carmack on mutable variables"]]></title><description><![CDATA[
<p>He will like RUST very much.</p>
]]></description><pubDate>Fri, 31 Oct 2025 11:32:32 +0000</pubDate><link>https://news.ycombinator.com/item?id=45770866</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=45770866</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45770866</guid></item><item><title><![CDATA[New comment by cfontes in "Spotting base64 encoded JSON, certificates, and private keys"]]></title><description><![CDATA[
<p>Not directly correlated but I know a old guy that can decrypt EBCDIC and credit card positional data format on the fly. And sometimes it was a "feeling" he couldn't explain it properlly but knew exactly the value, name and other data.<p>It was amazing to see him decode VISA and MASTER transactions on the fly in logs and other places.</p>
]]></description><pubDate>Tue, 05 Aug 2025 22:13:19 +0000</pubDate><link>https://news.ycombinator.com/item?id=44805098</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=44805098</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44805098</guid></item><item><title><![CDATA[New comment by cfontes in "Ask HN: Who is hiring? (February 2025)"]]></title><description><![CDATA[
<p>Hey there,<p>It's written, Florianopolis.<p>Good luck on the position.</p>
]]></description><pubDate>Tue, 04 Feb 2025 17:24:19 +0000</pubDate><link>https://news.ycombinator.com/item?id=42935571</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=42935571</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=42935571</guid></item><item><title><![CDATA[New comment by cfontes in "Unovis: Data visualization for React, Angular, Svelte, TypeScript, JavaScript"]]></title><description><![CDATA[
<p>Looks great thanks for this link, any good free gantts that you recommend?</p>
]]></description><pubDate>Tue, 13 Dec 2022 11:21:53 +0000</pubDate><link>https://news.ycombinator.com/item?id=33967364</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=33967364</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=33967364</guid></item><item><title><![CDATA[New comment by cfontes in "Lastpass Security Incident"]]></title><description><![CDATA[
<p>migrated to Bitwarden last time LP had a security breach, never been happier it's a lot better with a better app.</p>
]]></description><pubDate>Thu, 01 Dec 2022 12:58:49 +0000</pubDate><link>https://news.ycombinator.com/item?id=33815657</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=33815657</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=33815657</guid></item><item><title><![CDATA[The Terminal for the 21st Century]]></title><description><![CDATA[
<p>Article URL: <a href="https://www.warp.dev/">https://www.warp.dev/</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=33799164">https://news.ycombinator.com/item?id=33799164</a></p>
<p>Points: 2</p>
<p># Comments: 1</p>
]]></description><pubDate>Wed, 30 Nov 2022 11:01:34 +0000</pubDate><link>https://www.warp.dev/</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=33799164</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=33799164</guid></item><item><title><![CDATA[New comment by cfontes in "Palm OS developer releases source to classic games, 20 years after release"]]></title><description><![CDATA[
<p>Space trader was great, spent so much time playing it back then on my old m505</p>
]]></description><pubDate>Wed, 15 Jun 2022 10:11:40 +0000</pubDate><link>https://news.ycombinator.com/item?id=31751030</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=31751030</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=31751030</guid></item><item><title><![CDATA[New comment by cfontes in "Have an old iPad lying around? You might be able to make it run Linux soon"]]></title><description><![CDATA[
<p>its like a super raspberry pi, I would love to get 3 new pi's out of the blue, with camera, mic, accelerometer, etc...</p>
]]></description><pubDate>Mon, 06 Jun 2022 10:34:49 +0000</pubDate><link>https://news.ycombinator.com/item?id=31638822</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=31638822</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=31638822</guid></item><item><title><![CDATA[New comment by cfontes in "Ask HN: Do you use an optimization solver? Which one? Do you like it?"]]></title><description><![CDATA[
<p>So we thankfully didn't have to worry about conductor schedules another system our company built did it and we just worked on the assumption that the cow was spherical, this alone made a world of difference in segmenting whose head was exploding at which time.<p>All the rest was on us, failures, breakages, crashes (We never had one!!!), blocks were super interesting btw!.<p>So I got on it by chance, I just did interviews as a sport when I was in my early 30's so at some point I passed on this position, pay was awesome, lot's of travel involved, etc... So I joined and learned it all there, it was a small mom and genious software house that specialized on all types of JIT planning for railroads.<p>JIT was actually "THE" solution to it, because the controllers could just try it during the day, so let's say they new 18:00 was the worst and there was a huge trains comming in at that time with priority, he would just throw shit at the system to see how to same the most time sometimes, of course he knew how to do it by heart, but was it the "Best way" we could help him answering it super fast.<p>P.S: I am not ducth but I lived there for a while, I remember thinking about how much of a bad day it would have been if it was me, I knew exactly what the NS people were felling :D</p>
]]></description><pubDate>Fri, 22 Apr 2022 23:43:22 +0000</pubDate><link>https://news.ycombinator.com/item?id=31129669</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=31129669</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=31129669</guid></item><item><title><![CDATA[New comment by cfontes in "Ask HN: Do you use an optimization solver? Which one? Do you like it?"]]></title><description><![CDATA[
<p>I've used custom made implementation in Java ( proprietary based on the owner thesis ) to optimize train crossings for big mining companies like Vale, BHP and Rio tinto, it was stressful but super fun work!<p>Lot's of money to be made on it too if you guys are interested, but it's super niche and hard to get into. There is a huge resistence from train controllers and other workers. I actually understand it because of the job loss involved but it was super cool being in a NASA like control center sorrounded by panels and monitors and seeing the trains moving based on code I and other wrote!<p>It was a just in time local optimization with lots of heuristics and business rules embedded into it. Basically impossible to reuse between companies or even railroads sometimes, the controller would then solve all the more complex crossing that involved either some lose-lose choice or a pre-defined business decision.<p>The train controllers are amazing at their jobs, it's super stressful and a single mistake can kill people or make the whole thing stop for weeks, with the software running it made it a lot less risky, one dude could control an area that needed 7 or more people without it, with minor interventions.</p>
]]></description><pubDate>Thu, 21 Apr 2022 13:05:29 +0000</pubDate><link>https://news.ycombinator.com/item?id=31108839</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=31108839</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=31108839</guid></item><item><title><![CDATA[New comment by cfontes in "South Africa is running out of Marmite"]]></title><description><![CDATA[
<p>In NZ and AUS it's pretty common to see that happening on Hostels, because there is always at least one leftover jar of Vegemite in the pantry (Aus version of this) and the product looks somewhat like an off brand Nutella and doesn't smell as bad as it tastes...<p>I saw it happen numerous times while living there it has indeed hilarious specially because I did it too :D</p>
]]></description><pubDate>Wed, 20 Apr 2022 18:41:50 +0000</pubDate><link>https://news.ycombinator.com/item?id=31101166</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=31101166</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=31101166</guid></item><item><title><![CDATA[New comment by cfontes in "Ask HN: Anyone have stock option horror stories?"]]></title><description><![CDATA[
<p>Oh man, that hurts. 
As much as when I rejected an early position and at least 1% of a company that is now worth $1 B, because they demanded me to shut down a website I had at the time that was remotely related to their business and doing well ( I was super proud of it, we where getting some news coverage locally and even offers to sell) I would probably have joined if it was not for that demand, I think.<p>The most expensive thought of my life was "those fuckers will not tell me what to do".<p>I don't regret it, since it led me to the best part of my life after that site was eventually shut down 3 years later, but man... Sometimes late at night, alone over a drink, it comes back and bites.</p>
]]></description><pubDate>Thu, 17 Mar 2022 10:21:07 +0000</pubDate><link>https://news.ycombinator.com/item?id=30709508</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=30709508</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=30709508</guid></item><item><title><![CDATA[New comment by cfontes in "Cloudpilot, a PalmOS Emulator for the Web"]]></title><description><![CDATA[
<p> Space Trader was a time sink, I played it so much on My Palm Vx and that Blue Palm Zire 71.<p>Loved both, both were stolen unfortunately otherwise I would have them.</p>
]]></description><pubDate>Wed, 09 Feb 2022 16:42:02 +0000</pubDate><link>https://news.ycombinator.com/item?id=30274744</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=30274744</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=30274744</guid></item><item><title><![CDATA[Pypilot is an open source marine autopilot]]></title><description><![CDATA[
<p>Article URL: <a href="https://pypilot.org/">https://pypilot.org/</a></p>
<p>Comments URL: <a href="https://news.ycombinator.com/item?id=30146811">https://news.ycombinator.com/item?id=30146811</a></p>
<p>Points: 2</p>
<p># Comments: 0</p>
]]></description><pubDate>Mon, 31 Jan 2022 11:17:27 +0000</pubDate><link>https://pypilot.org/</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=30146811</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=30146811</guid></item><item><title><![CDATA[New comment by cfontes in "Ask HN: Companies of one, what is your tech stack?"]]></title><description><![CDATA[
<p>I am buiding a Purchasing system for construction comapanies ( I own one and it's test subject atm).<p>The sofware focus on automating tasks other systems don't, document decisions and an extremelly tight link between the budget and the real and projected expenses.<p>Construction is a very local dependent business so good systems from other countries didn't adapt really well here. Hence the effort to make our own. I am the solo dev.<p>Stack is<p>* Backend: Quarkus.io , Lombok and Java<p>* Frontend: React, Ant Design and Typescript<p>* Persistentency: Postgres<p>* Automatic Backup: S3 and custom Postgres container<p>* Platform: Civo and K3s for PROO<p>* Security: Keycloak<p>* CI/CD: Github actions and Cloudflare pages<p>* Local Env:  Docker for local.<p>* Ide:IntelliJ<p>Why did I Chose it: 
* Java and Quarkus: because I have 20 years of experience with Java, it's rock solid, performance is great and I am fast with it.<p>* Civo and K3s: Because I love k8s but it's too expensive to run for my operation.<p>* Postgres: It's just great.<p>* React and Ant Design: I like React approach, I have used Angular and Backbone before and react is awy better. Ant Design is just awesome, great looking components and they work 99% of the time, documentation is also very good.<p>* Keycloack: because makes me faster, implementing security by your self is always a bad idea unless you are a pro, which I am not. Keycloak let's me focus on the business.<p>* Github actions: Simple, powerful, free!<p>* Cloudflare pages: Simple, powerful, free!<p>Do you think your choices had any impact on your success?<p>Not there yet, let's talk in 3 years.
But we are using the system at my company already and locally it's been a great sucess, improved our work by a mile, people are happy using it even with some bugs, we are already saving money and identifying places where we didn't have a good budget to improve next time.
We also are not afraid of people leaving anymore, since with the system their replacements can pickup where they left and continue to work on Day  1 and buy stuff maintaining the time requirements, that was the best part.</p>
]]></description><pubDate>Wed, 25 Aug 2021 10:05:19 +0000</pubDate><link>https://news.ycombinator.com/item?id=28299691</link><dc:creator>cfontes</dc:creator><comments>https://news.ycombinator.com/item?id=28299691</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=28299691</guid></item></channel></rss>