Saul Calderon

Product Engineer

Build Ambassador @ SpaceXSI Community

🔜

[Saul Calderon @saulcal14]

300+ people at DevDay Exchange San Salvador 🔥

Co-hosted with @wmoralesdev and @irenehl__ (thanks for the opportunity), and gave a talk on building dynamic websites with Codex and Higgsfield.

Demo: https://t.co/60BreBjdkH

#DevDayCommunity

[Rubén del Campo @rdelcampog]

Brutal el memo interno (mandado a su equipo de ingeniería) que ha publicado la gente de Proton.

“Your job has fundamentally changed. It is no longer to write code, […]. Your job is to help the LLM write better code faster.”

Mini-turra con ideas que comparto:

Ahora somos managers (sad news). Tus direct reports son tus agentes. Un equipo que para cuando el lead está en una reunión no es un equipo. Si tu agente necesita que estés encima suyo para hacer su trabajo, no tienes un agente, tienes un becario premium.

Cada problema o fallo que se repite es un bug del sistema (no del modelo). No se le corrige al agente y se sigue, pues volverá a fallar. Le escribes un fichero de contexto en el repo, le haces una skill, una regla, o lo que se te ocurra, pero lo que aprende un agente lo debe aprovechar el equipo entero.

Cada vez que quites un cuello de botella, aparecerá otro. Escribir código siempre fue lo más lento, ya no. Ahora lo que tienes reventando es la CI, las specs, las aprobaciones o la code review. Usar la IA para ir más rápido solo en una fase del proceso te va a sepultar.

El modelo es rápido, tú eres lento pero tienes el criterio y tú eres quien responde cuando algo falla. Picar teclas como profesión se acabó. Toca ser ingeniero.

[Saul Calderon @saulcal14]

@abrilzucchi Great write-up! Just realized the trade-offs involved in taking ownership of our lives to achieve the goals we want.

[Blake Burge @blakeaburge]

Major cheat code for life: Assume good things are still ahead. You are not behind. You are not too late. You are not disqualified by your past. One new season can change the entire story. Keep showing up with belief. The best chapters are often written after the hardest ones.

[Walter Morales @wmoralesdev]

Full house today in San Salvador for #DevDayCommunity 😍

And our future Codex ambassador too (hopefully) @irenehl__

[Burak @xburak]

Successful iOS apps with low churn usually have one thing in common: they give users a real reason to open the app again tomorrow.

The three retention loops I see working most often:

- Weekly/monthly recaps that show progress over time
- Streaks that reward daily consistency
- Reminders that bring users back at the right moment

If your app doesn't have any of these, subscriptions tend to quietly die off within a few weeks.

What other retention loops have you seen work well?

[Gergely Orosz @GergelyOrosz]

Like it or not, modern sw engineering is no longer done without LLMs (AI) and will no longer be done without.

Whoever doesn’t want to use AI, no problem: but you won’t be hired at 99.9% of startups+Big Tech+ambitious companies, even today

It’s as part of sw dev as the keyboard

[Saul Calderon @saulcal14]

Productive last month with @WisprFlow 🚀

[Saul Calderon @saulcal14]

@yul_magdaleno The dream

[Saul Calderon @saulcal14]

@fher_eduardo Tienen algo que lo atrae a uno. No tengo un Nismo pero no me quejo 🫣

[Walter Morales @wmoralesdev]

@spacexai, el salvador knows the only way is up 🚀

that’s why 200 people joined us for our first grok @bot meetup – our biggest event so far. thanks to everyone who made it happen!

[Pablo @pfernan95dev]

The free tiers I'm actually using right now:

• Clerk — 50k users
• Supabase — 50k MAU
• PostHog — 1M events
• Cloudflare Workers — 100k req/day
• Resend — 3k emails (but really 100/day)
• Sentry — 5k errors
• RevenueCat — free until $2.5k MRR

What are yours?

[Cory House @housecor]

Roles are collapsing.

If you're a "Software Engineer" today, you may be a "Product Engineer" soon - with many more responsibilities.

So:
- Learn design/UX/QA/PM skills.
- Focus more on the user, and less on the syntax.

Image via Gartner.

[Saul Calderon @saulcal14]

Oh boy. I got the Z!

[Sebastián Ceciliano 🔜 Devcon 🇮🇳 @Cbiux_04]

A huge thank you to @wmoralesdev , @irenehl__ , @alonsowr , @BeatrizDelPinal , and @saulcal14 for traveling to Costa Rica and sharing their knowledge with everyone.

You made this event truly special.

[Saul Calderon @saulcal14]

@wmoralesdev @irenehl__ @cursor_ai https://t.co/YdwU4G4Fe5

[Saul Calderon @saulcal14]

Bloopers from recording a demo of our solution just a few minutes before submission closes.

Cursor Buildathon in San Salvador!

@wmoralesdev @irenehl__ @cursor_ai

#Cursor
#Buildathon

[Saul Calderon @saulcal14]

@benln It sounds like a job for @wmoralesdev!

[Miguel Avoleván  @avolevan81]

#LoÚltimo Pan Lido renueva el nombre de uno de sus productos más emblemáticos.

[Saul Calderon @saulcal14]

Wall of stickers: 2025 - June 2026