Marcos F. Lobo 🇺🇦💙💛 @[email protected]

👋🏼 Marcos here and I love these topics: ✳️ Software Engineering ✳️ Technical Leadership ✳️ Technical Growth I help you to be better on those topics here down 👇 newsletter.optimistengineer.com All with a bit of optimism 🌱 #softwareengineering #leadership #growth #optimistengineer

If you need to understand the difference between different LLM models, this is a must-read 👇🏻 open.substack.com/pub/alexewerlo…

🚨 📣 Estoy muy feliz de contáros que ya que está disponible la entretenida entrevista que me hizo Hernán Díaz Rodríguez, dentro del marco de la Microcredencial en Inteligencia Artificial en la @uniovi_info

Si te gusta la navidad y te apetece disfrutarla en #asturias esto te interesa 👇🏽 open.substack.com/pub/ruralprene…

@simyo_es ¿Alguna previsión de cuándo se va a restaurar la línea de internet en las zonas afectadas? En mi caso, llevo sin internet desde las 13:35 de hoy , más o menos. Gracias.

An incremental architecture is an architecture designed to grow. And why this is something you should care of? 👇🏽 newsletter.optimistengineer.com/p/incremental-…

This is a fact 👇🏽 newsletter.optimistengineer.com/p/incremental-… #softwareengineering #architecture

Cross-functional teams deliver faster than layered organizations because each team owns a domain end-to-end. No waiting for “the backend team” or “the frontend team” to free up a sprint. newsletter.optimistengineer.com/p/incremental-…

People leave companies because: 🟢 Money 🟢 Stability 🟢 Work respect Fruits, candies, retro-game machine, and apéros after work are just smoke bombs. newsletter.optimistengineer.com/p/how-can-you-…

Folks, I've just published another learning about how make software Architectures Incremental. I would love to hear your thoughts about it 👇🏽 newsletter.optimistengineer.com/p/incremental-… #software #architecture #TechLead

In this email, I just wanted to make a heads-up about Crossplane, a technology that solves a real and important problem that the majority of us suffer from every day: 👉🏼 Not owning our infrastructure. newsletter.optimistengineer.com/p/enabling-dev… #crossplane #kubernetes

Are you into some certification? 🟢 Is it worth it? 🔴 Or better to pass? I read you in the comments 👇🏽 newsletter.optimistengineer.com/p/are-certific…

If you want, I can share a checklist and commands to spin up the POC in 10 minutes with Promptfoo. You can run it today and present results in your next sprint demo. Interested? ainativecompass.substack.com/p/from-chaos-t…

You can now own your infrastructure without opening a ticket. newsletter.optimistengineer.com/p/enabling-dev…

Practical idea: define 5 representative prompts, run them with 2 models and 2 data domains. Measure accuracy, format correctness, and tokens. If just one combination performs clearly better, you’ve already saved time and money.

Useful tools to kick off your POC: Promptfoo for CI testing, LangSmith for traceability, and OpenAI Evals for programmable cases. Start with one tool and measure. Then decide if building something internal makes sense.

If your org needs governance or traceability, manual prompt testing won’t cut it. Integrate prompt tests into CI: fail the pipeline if a prompt breaks coverage or format. You’ll avoid regressions and production surprises.

Not all prompts work equally across models. Evaluate them by model and by data domain. That’s how you know when to use Gemini, Claude, or whichever model gives you the best quality-to-cost ratio. ainativecompass.substack.com/p/from-chaos-t…