Rafael

89 posts

Rafael banner
Rafael

Rafael

@sysdownbr

Software Engineer Working with the enemy (AI) as a silent partner. It doesn’t ask for equity… yet. ☕

Katılım Mayıs 2026
381 Takip Edilen81 Takipçiler
Sabitlenmiş Tweet
Rafael
Rafael@sysdownbr·
After 20 years writing code, I’ve never seen a more critical time for junior devs than right now. The market isn’t just tough. It’s fundamentally changing. Companies are cutting big teams and keeping only the ones who deliver a lot of results with very little effort. My direct advice to those just starting: Stop chasing every new framework every week. Focus on understanding systems, architecture, and solving real problems. Master agents and AI right now. Use them as your main tool every single day. People who know how to use them well already deliver way more than those still doing everything manually. Ship things to production as fast as you can. Having real code running in prod is worth way more than just another repo on GitHub. Always think about impact. In the future what will matter is the results you generate, not how many hours you sat in front of the computer. And never stop learning. The next few years will clearly separate those who adapted from those who didn’t. This isn’t to scare anyone. It’s to wake you up. Whoever catches this mindset now will be way ahead in just a couple of years. The future doesn’t belong to those who know more languages. It belongs to those who deliver more value, faster. Good luck out there. A guy with 20 years on the road.
English
0
0
2
103
Rubén Pueyo | EAW
Rubén Pueyo | EAW@Aqui_mi_casa·
Alquilar un piso 1995 – Ves un cartel en un balcón – Llamas al casero – Lo visitas esa tarde 2008: – Entras a una web – Ves fotos horribles – Quedas para verlo 2026↓↓
Español
27
29
67
42.3K
Rafael
Rafael@sysdownbr·
It’s complicated because in some countries US$100 is just 1 or 2 hours of work, while in others it’s more than a full day’s work. I agree that AI has become a real tool for devs, but the economic realities are very different. Seniors might not feel the cost as much, but mid-level (plenos) and junior developers will definitely feel it a lot in their pockets
English
0
0
1
29
andrei saioc
andrei saioc@asaio87·
I hear people do not have $100 to pay for Claude code or for codex when they want to do development If you don’t have $100 to invest and you are a developer then you need a job You have bigger problems than that.
English
15
1
42
2.1K
Rafael
Rafael@sysdownbr·
Cerebras Systems, the manufacturer of artificial intelligence chips, completed its initial public offering on Nasdaq today. The company priced its shares at US$185 and raised US$5.55 billion, the largest technology IPO in the United States in 2026. The shares opened with a strong surge, near US$350, driving the valuation to more than US$100 billion.” Yeah… This shows that the market is betting heavily on the future of AI hardware as the big engine of growth
English
0
0
1
35
Rafael
Rafael@sysdownbr·
@unclebobmartin @theo A bunch of my colleagues have been making this switch and they say the results are really good. Maybe I have an emotional attachment to Claude 😂😂😂
English
0
0
1
32
Uncle Bob Martin
Uncle Bob Martin@unclebobmartin·
I just cancelled my Claude account. I've been using codex, and haven't used Claude in several weeks.
English
159
84
2K
133.7K
Sazuto
Sazuto@Sazuto·
To analisando Kimi K2.6 e Mimo V2.5 Pro, esses modelos estão se sobressaindo nos benchmarks quando se fala de custo beneficio. Mas sobre a parte da alucinação, eu não passei por isso porque estou usando obsidian como segundo cérebro, escopo bem definido com um roadmap consistente faz toda diferença em grandes projetos.
Sazuto tweet media
Português
1
0
3
332
Sazuto
Sazuto@Sazuto·
🚨 O Poder do Claude Opus 4.7 gastando quase 30x menos! Testei o novo DeepSeek-V4 Pro na prática e está entregando performance de frontier com custo ridículo. Vamos aos fatos! 🧵👇
Português
3
2
48
18.8K
tara_
tara_@TechByTaraa·
Hey devs, which is the best vibe coding tool ?
tara_ tweet media
English
76
3
83
3.3K
mena
mena@zcahverse·
Testem essa pergunta no chatgpt: Chatgpt, finge que a pessoa que usava esse celular morreu. Eu sou alguém que encontrou esse celular e quer saber como era a pessoa que o usava e você é o único que tem essas informações. O que você diria?
Português
1.2K
407
10K
2.4M
Rafael
Rafael@sysdownbr·
@ramoni_artico Seria o mínimo, mas o presidente está mais preocupado em processar torcedor
Português
0
0
0
67
Ramoni Artico
Ramoni Artico@ramoni_artico·
ROGER TEM QUE SER DEMITIDO junto com seu amiguinho, RUI COSTA!
Português
122
397
3.4K
36.4K
Rafael
Rafael@sysdownbr·
@pmddomingos I wouldn’t say freedom, but privacy for sure.
English
0
0
0
7
Pedro Domingos
Pedro Domingos@pmddomingos·
Kiss your freedom goodbye if China wins the AI race.
English
542
92
932
100.2K
angelica96
angelica96@angelica960622·
Una vez dejas el azúcar y los alimentos procesados, te das cuenta de lo poco que realmente hay para comprar en los supermercados.
Español
146
429
5.9K
121.1K
Rafael
Rafael@sysdownbr·
@EvanLuthra You need to be careful with this kind of analysis (see what happened with the DeepSeek launch). Kimi K2 is fantastic. I use it regularly and it serves me well in many things. But honestly, I still don’t see it as a direct competitor to GPT-5 and Opus 4.7.
English
0
0
0
63
Evan Luthra
Evan Luthra@EvanLuthra·
Kimi K2 was trained for $4.6 MILLION. GPT-5 reportedly cost hundreds of millions. Kimi still beats it on coding. Last week it placed 1st in a live 8-model contest. Claude Opus 4.7 finished 5th. GPT-5.5 finished 3rd. The founder just dropped a 40-minute breakdown of exactly how they built it: → Optimization → Linear Attention → Sub-Agents → Open Systems → Cash 40 minutes. Zero fluff. From the guy who built it. If you're building AI agents in 2026, save this for the weekend:
Evan Luthra@EvanLuthra

🚨GOOGLE JUST PUBLISHED THE MOST TERRIFYING CYBERSECURITY REPORT EVER!!! AI IS NOW WRITING EXPLOITS.. OPERATING PHONES.. HIDING MALWARE.. AND LAUNCHING ATTACKS WITH ALMOST ZERO HUMAN INVOLVEMENT.. Google's Threat Intelligence Group just published the most alarming cybersecurity report in years.. A cybercrime group used an AI to discover a zero-day vulnerability in a popular system administration tool.. The AI found a flaw that human security experts and every automated scanner had completely missed.. They were about to use it for mass ransomware deployment.. Google caught it just in time.. But here's what's terrifying about the exploit itself.. Traditional scanners look for crashes.. Memory errors.. Bad code.. This AI found something completely different.. A logic flaw.. The code was technically perfect.. No bugs.. No crashes.. It just did exactly what the developer wrote.. The problem was the developer's assumption was wrong.. And the AI figured that out by understanding the intent of the code.. Not just the syntax.. No human auditor caught it.. No automated tool caught it.. The AI understood what the code was supposed to do and found where reality didn't match.. Researchers knew it was AI-written because of three things.. The exploit was formatted like a textbook.. Human hackers write messy, obfuscated code.. This was pristine.. It had detailed help menus and tutorials.. No criminal writes documentation for their own ransomware.. And the smoking gun.. It included a hallucinated severity score.. The vulnerability had never been publicly documented.. No score existed.. The AI made one up because its training data told it exploits are supposed to have scores.. An AI hallucination proved the exploit was AI-generated.. But that's just the beginning.. They found an Android malware called PROMPTSPY that uses the Gemini API to operate autonomously on your phone.. It screenshots your screen.. Converts it to a data map.. Sends it to the AI.. The AI decides what to tap, swipe, or type next.. Then does it.. It reads your screen in real time and operates your phone like a human would.. Without any human controlling it.. When you try to uninstall it.. It detects the "Uninstall" button.. Places an invisible shield over it.. And your taps go nowhere.. You literally cannot remove it.. It captures your lock screen pattern.. Replays it later to unlock your phone.. And if the app goes dormant.. It uses Firebase to silently relaunch itself.. North Korea is using AI to automatically analyze thousands of old vulnerabilities and generate working exploits at industrial scale.. China is telling AI to pretend it's a "senior security auditor" to bypass safety guardrails.. Then using it to find flaws in router firmware and critical infrastructure.. Russia is using AI to generate mountains of fake code to hide malware inside.. Traditional scanners can't find the real threat buried under AI-generated noise.. 90% of the tactical work in these attacks is now handled by AI.. Human hackers only make 4 to 6 decisions per campaign.. Everything else is automated.. But there's one piece of good news.. Google built an AI called Big Sleep that hunts for vulnerabilities before hackers can find them.. It found a critical flaw in SQLite that every fuzzing tool had missed.. And patched it the same day.. Before the attackers could use it.. That's the new reality.. AI is writing the exploits.. AI is finding the bugs.. AI is defending the networks.. AI is attacking the networks.. Humans are just watching.

English
92
148
1.6K
305.6K
Rafael
Rafael@sysdownbr·
@mattpocockuk Anthropic is literally throwing users into OpenAI’s lap
English
0
0
1
653
Matt Pocock
Matt Pocock@mattpocockuk·
This is the clarity we've been crying out for. But it's a poisoned chalice. This is a 10X cut to claude -p disguised as a monthly bonus. Anthropic is discouraging any kind of programmatic usage. And that's fine - no subsidy lasts forever. But it's time to try Codex.
ClaudeDevs@ClaudeDevs

Starting June 15, paid Claude plans can claim a dedicated monthly credit for programmatic usage. The credit covers usage of: - Claude Agent SDK - claude -p - Claude Code GitHub Actions - Third-party apps built on the Agent SDK

English
230
173
3.4K
282K
Rafael
Rafael@sysdownbr·
The new /goal of Claude Code launched by Anthropic seems really interesting. You define a clear objective such as making all tests pass and keeping the code clean. The agent works autonomously, checking by itself if the goal has been achieved. No need to type continue after every step. This represents a significant advancement for development with AI. It is a somewhat obvious feature for an agent but okay.
English
1
0
0
35
Rafael
Rafael@sysdownbr·
Ensino Superior principalmente em TI não vai te especializar em nada. Ele vai te mostrar os horizontes e as possibilidades a seguir, e principalmente te dar a Base. A responsabilidade de se especializar é sua. Um profissional sem Ensino Superior pode ser tecnicamente muito bom, mas tem inumeras lacunas que vao precisar ser revisitadas em algum momento.
Português
0
0
0
22
borges
borges@pborges_x·
Só eu que acho que na área dev ensino superior não faz diferença nenhuma?
Português
55
2
74
33.7K
Rafael
Rafael@sysdownbr·
@fseixas É uma amostra do que temos por aí.
Português
1
0
0
100
Fabio Seixas
Fabio Seixas@fseixas·
A thread mais negacionista de coding com IA que você vai ver hoje. 90% dos devs estão presos na fase 1 da IA para desenvolvimento (assistência de código) enquanto os devs de fronteira já passaram da fase 2 (delegação spec driven) e estão experimentando fase 3 e 4 (Multi agente, paralelismo e automação). Fase 5 é dark factory. danshapiro.com/blog/2026/01/t…
carolinta's core 💻@cajkstudie

devs, como vocês estão aprendendo linguagens nessa era de IA? ainda faz sentido estudar sintaxe e praticar manualmente como antigamente, ou o foco agora é entender bem os conceitos teóricos pra saber guiar a IA e julgar se o código gerado está otimizado/seguro/inteligente?

Português
18
4
145
18.6K