Juan Cruz Martinez (@bajcmartinez) 's Twitter Profile
Juan Cruz Martinez

@bajcmartinez

I stream, blog, and make youtube videos about tech stuff. I love coding, I love React, and I love building stuff!

ID: 10251182

linkhttps://linktr.ee/bajcmartinez calendar_today14-11-2007 16:51:19

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Feedback isn’t about being nice or harsh. It’s about being *clear*. Here’s the structure I use: 1. **Observation** — “In the last demo, you…” 2. **Impact** — “…it caused some confusion for the audience.” 3. **Next step** — “Next time, let’s try rehearsing together first.”

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You’ve probably seen the headlines: “AI now writes 30% of the code at company X.” Sounds impressive, right? But here’s the problem: more code ≠ more value. In fact, if AI helps us ship *faster but messier*, developer experience gets worse: • More code to maintain • More bugs

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AI often hallucinates code. Instead of asking “write me X,” ask: “Suggest the structure of X, but don’t fill in the details.” Then *you* fill in the real logic. You avoid hallucinations, keep control, and still save time. Have you tried this way of prompting?

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Most standups are weather reports. Try this: 1) Decision needed today? 2) New constraint discovered? 3) One blocker the team can remove right now? Skip the play-by-play. Move decisions, surface constraints, kill blockers. If your standup doesn’t change the day, it’s just

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ChatGPT can now securely access any HTTP based MCP Server. This is fantastic news! ChatGPT just became a lot more powerful. x.com/openaidevs/sta…

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The best engineers I’ve worked with aren’t faster because they type faster. They’re faster because they: •Say “no” to distractions •Automate repetitive work •Protect focus like their life depends on it Deep work > fast fingers. What’s your #1 focus hack?

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💡 Not Everything Needs AI I came across a story: a team was burning **$1,200/month on GPT-4**… to extract phone numbers, reformat JSON, even uppercase text. Their solution? Switch to a smaller, cheaper model. It cut costs — but the real issue remained: why use AI at all? In

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If your team spends more time in meetings than in flow, you don’t have a productivity problem. You have a prioritization problem. Cancel half your recurring calls. See what happens.

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Your career grows in three phases: 1.Be reliable (deliver code) 2.Be visible (share, mentor, document) 3.Be influential (set direction) Too many devs get stuck at phase 1. Which phase are you in?

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Most developers prompt AI like *users*: “Write me some code for X.” I used to do the same — and 90% of the time, I got junk back. Then I realized: AI is just another system. And like any system, garbage in = garbage out. So I started prompting like an *engineer*: - Define the

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🚨 The npm attack — lessons for every engineer & leader On September 8th, one of the largest npm supply chain attacks in history happened. Here’s what went down: * A trusted maintainer received a phishing email that looked like it came from NPM support. * The fake site tricked

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Every interruption costs more than just a few seconds. Research by Gloria Mark (UC Irvine) found it takes an average of **23 minutes** to get back on task after an interruption. 3 pings per hour = your whole day is gone. Protect your calendar like you protect production. Focus

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Could AI broaden the gap between developed and developing nations? AI is an amplifier. It makes strong systems stronger. Which means it could also make weak systems weaker. Here’s why the gap might widen: * Infrastructure: advanced AI requires massive compute, stable internet,

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🧠 The Advocate’s Second Brain Developer advocacy is a constant stream of information: * Conversations at conferences * Questions in Discord and Slack * Feedback on docs * Side chats with product and engineering If you don’t capture it, it disappears. If you *do* capture it,

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Code reviews aren’t just about catching bugs. They’re about learning. When I was an engineer, every review taught me something new: * A better way to name variables * A pattern I hadn’t seen before * A subtle security concern I would’ve missed Yes, reviews improve the code. But