Co-Founder at Alphnology | Vaadin Champion | JUG Leader (Java Dominicana) | JConf Dominicana Staff | Java Expert | Speaker | Lecturer | Tech Consultant
Santiago, Dominican Republic
Joined May 2012
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Get to know a little about me. 😄😄😄
Caribbean contributors: Freddy Peña’s journey into Java and open source.
From a curious 13-year-old in Monte Cristi watching a neighbour code in Visual Basic… to a leading Java expert, educator, and community builder, Freddy Peña’s story is a testament to how curiosity, resilience, and open source can transform lives.
💬 His message? “Different opinions create better solutions.”
Discover how Freddy is amplifying open source opportunities across the Caribbean and inspiring the next generation: hubs.la/Q03WsGDW0
#GlobalVoicesOSS #CodeFromTheSouth #Java #opensource
Fred Peña retweeted
Peak-hour callers don't want a menu. They want a person who says 'we're on it' fast. Automation can triage after hours, but every missed call still needs a human callback with a time promised and kept. climacall.com/human-follow-u… #HVACBusiness
Fred Peña retweeted
Migrating a 53-screen JSF 2 app to Vaadin 25 with 7 AI agents in parallel.
Best lesson: tests were green while 13 forms rendered blank. Now no view closes until someone clicks through it in a browser.
vaadin.com/blog/jsf-2-to-vaa…
ALT Blog cover: Building a pipeline that migrates a JSF 2 application to Vaadin 25
Fred Peña retweeted
Picking an AI coding tool for a Java team? We compared 8 (Claude Code, Cursor, GitHub Copilot, Junie, Codex, Antigravity, Kiro, Moderne) on codebase context, IDE fit, MCP support, enterprise readiness and price.
vaadin.com/blog/the-best-ai-…
ALT Workflow diagram: an AI agent uses the Vaadin MCP server and Agent Skills to write Java code, which the compiler and tests check before shipping, looping back to fix failures.
Fred Peña retweeted
Flat fee, tiered, per-system — most shops copy a competitor's pricing and wonder why churn is high. Structure your agreements on purpose, not by accident. climacall.com/understanding-… #HVAC
Fred Peña retweeted
1/10 🧵 ¿Qué cambió en la @LIDOMRD en las últimas 5 temporadas? Más carreras, abridores más cortos y un Escogido bicampeón que se transforma en el RR.
Un hilo con datos de MLB (2021-22 a 2025-26) 👇
Muestras pequeñas: esto mide lo que pasó, no la calidad del equipo o jugador.
Fred Peña retweeted
Scalability. Resilience. Performance. Maintainability. ⚖️
How do you balance them?
The #Devnexus2027 System Design track gets into the practical trade-offs, from distributed systems & microservices to cloud-native architecture and AI integration.
→ devnexus.com
Fred Peña retweeted
Port a Swing app to Vaadin by swapping imports: javax.swing.* → vaadinx.swing.*
In a 65-file inventory app, 97.3% of lines stayed byte-identical. 40+ Swing components, blocking modal dialogs included.
vaadin.com/blog/swingbridge-…
ALT Blog cover: SwingBridge Emulators, Swing to Vaadin by swapping imports
Fred Peña retweeted
Did your coding agent's change actually reach the running app?
Vaadin 25.3's Dev Loop CLI (preview) tells it: is the app running, hot-swap or restart, and is each change live.
Try the tutorial:
vaadin.com/docs/latest/build…
ALT Video thumbnail: Vaadin 25.3, faster, more autonomous coding agents for Java UIs
Fred Peña retweeted
That quote didn't lose to a competitor. It lost to silence. Ghosted estimates are half-won jobs bleeding revenue — fix the follow-up, stop the leak. climacall.com/lost-leads-and… #HVAC
Fred Peña retweeted
Comparto vídeo de una charla sobre el tema que impartí un año en @JavaDominicano
Hablando de basura: Garbage Collector, ¿Qué es? ¿Cómo funciona? ¿Cuál de... youtube.com/live/Y67pGMzGD6Q… via @YouTube
Fred Peña retweeted
Aún estás a tiempo para registrarte. Nos vamos mañana miércoles 30 de septiembre.
Nuestra próxima actividad: Evento Virtual
Construyendo Asistentes Empresariales con RAG y Spring AI: IA Generativa real en Java
Registro: eventbrite.com/e/construyend…
#java #springai #jugevents #latamjugs
Fred Peña retweeted
Your LSA cost per lead isn't random — it's a mirror of how badly you're tracking close rates. Fix lead tracking before blaming Google for leads that never book. climacall.com/google-local-s… #HVAC
Fred Peña retweeted
Vaadin 25.3 improves the AI dev loop 🤖
🧠 MCP, skills & agent tools give coding agents up-to-date Vaadin context
⚡ Browserless tests let agents self-verify changes in milliseconds
🎨 Dev Loop makes UI tweaks visible instantly
vaadin.com/docs/latest/build…
🤖 Made with AI
Fred Peña retweeted
Missed calls aren't a phone problem - they're a follow-up problem. Small HVAC shops lose real revenue when nobody owns the callback. Fix the routine, not the headcount. climacall.com/the-missed-cal… #HVAC
Fred Peña retweeted
Nuestra próxima actividad: Evento Virtual
Construyendo Asistentes Empresariales con RAG y Spring AI: IA Generativa real en Java
Registro: eventbrite.com/e/construyend…
#java #springai #jugevents #latamjugs
Fred Peña retweeted
Most field software is designed by people who have never stood in a mechanical room, and your crew feels it on every job. What to check before you commit the whole team to a platform: climacall.com/frustration-wi… #HVAC
Fred Peña retweeted
Six months of Floci, the free local cloud emulator.
2.6M Docker pulls. Floci 2.0, with twenty new AWS services. The image got about 40% smaller. 894 PRs merged in thirty days.
Including the part where three emulators are too slow.
linkedin.com/pulse/state-flo…
Fred Peña retweeted
A canceled slot doesn't cost you one job — it costs you the route you already built around it. Most HVAC shops can't backfill same-day because dispatch isn't clustering by location. That's fixable. climacall.com/scheduling-hea… #HVAC
Fred Peña retweeted
HVAC techs are still asking Reddit what software handles quoting, inventory, and dispatch without crashing. Answer: nothing dominant yet. tinyurl.com/2427kpyg #HVAC
