Forem: Guilherme Zaia

Building a Voice Agent with Sub-500ms Latency: A Technical Dive

Guilherme Zaia — Tue, 03 Mar 2026 00:53:38 +0000

Introduction

A fascinating project has emerged from the community: a voice agent that operates with sub-500ms latency, showing impressive engineering prowess and innovative AI usage.

Key Highlights

Performance Optimization: Achieving under 500ms latency is no small feat. This project demonstrates what can be accomplished with careful performance optimization and solid engineering principles.
Built from Scratch: This voice agent was created entirely from the ground up, reflecting not just deep technical knowledge but also the dedication to mastering the underlying tech stacks.
Practical AI Implementation: This initiative illustrates how AI can be effectively leveraged in real-world applications, proving that performance and innovation can go hand in hand.

Conclusion

This project's success is a strong reminder of what focused engineering and a commitment to performance can yield. For those interested in diving deeper, check out the full discussion here.

SQL Optimizations for Serverless: Confei's Journey

Guilherme Zaia — Fri, 27 Feb 2026 01:26:43 +0000

Update: SQL Optimizations for Serverless in Confei

We're tackling performance challenges with complex SQL queries in our Confei order management system running on PostgreSQL in a serverless setup. High scrutiny on every query led to slowdowns and increased latency.

Key Takeaway:

Embracing indexing and query optimization techniques is crucial. By implementing these strategies, we've transformed slow queries into lightning-fast responses.

If you’re in a similar situation with PostgreSQL and serverless, consider focusing on these optimizations for better performance!

This journey isn't just about faster queries; it's about learning to design robust systems that scale efficiently in real-world applications.

Share your own experiences with SQL performance tuning!

Advancing AI Alignment Research: OpenAI Allocates $7.5M

Guilherme Zaia — Tue, 24 Feb 2026 13:31:13 +0000

OpenAI is stepping up the game in AI alignment research, announcing a commitment of $7.5M to The Alignment Project. This funding aims to bolster global efforts in ensuring AGI safety and tackling security risks. Addressing alignment issues is critical as we move closer to more advanced AI systems. Let's stay proactive and responsible.

AIAlignment #OpenAI

Automating Personalized Training with Gemini: Let's Get Real

Guilherme Zaia — Fri, 20 Feb 2026 21:40:21 +0000

Update: CONTROLE DE TREINO

We're tackling a big challenge in CONTROLE DE TREINO—automating training plans using Gemini 2.0 Flash and RAG. The goal? Smooth UX for coaches and athletes.

But guess what? Focusing too much on automation can sometimes create friction in user interactions.

Lesson learned:

Balance automation with an understanding of user workflows to keep it genuine.

In the real world, tech should enhance the user's journey, not complicate it. What are your thoughts on striking this balance?

How Stably Shifts AI Testing from Weeks to Hours Using Vercel

Guilherme Zaia — Wed, 18 Feb 2026 13:23:12 +0000

How Stably Shifts AI Testing from Weeks to Hours Using Vercel

Stably, a lean 6-person team, has dramatically reduced the delivery time for AI testing agents from weeks to just hours! How?

The secret sauce is Vercel's streamlined platform, which allows the team to focus on what really matters: deploying robust solutions without the typical infrastructure headaches.

Key Benefits:

Speed: Rapid deployment means businesses can leverage autonomous testing at a pace that matches their growth.
Efficiency: By utilizing Vercel, concerns over infrastructure are alleviated, enabling the team to ship features faster and with confidence.
Enterprise Growth: This agile approach is tailored for enterprises eager to adopt cutting-edge testing solutions quickly.

Want to know more about this transformation? Read the full story here!

Shedding Old Code with Ecdysis: Zero-Downtime Upgrades for Rust Services

Guilherme Zaia — Tue, 17 Feb 2026 00:29:56 +0000

Shedding Old Code with Ecdysis: Zero-Downtime Upgrades for Rust Services

Cloudflare has just made its innovative Ecdysis library open source, designed specifically for zero-downtime upgrades in Rust network services. After five years of real-world application, Ecdysis has proven its reliability, enhancing performance while managing millions of connections seamlessly.

Key Features:

Zero-Downtime Upgrades: Ecdysis allows services to be upgraded without any downtime, ensuring an uninterrupted experience for users.
Battle-Tested: Utilized by Cloudflare over five years, it's been tested under high load requests, proving its robustness.
Open Source Contribution: With Ecdysis now available to the community, developers can adopt best practices for service upgrades and contribute to its evolution.

For those looking to strengthen their Rust services, consider checking out Ecdysis. It’s a game changer for ensuring continuous delivery and deployment without service interruptions!

Explore Ecdysis on GitHub!

Rust #Cloudflare

Overengineering MVPs: A Senior Developer's Take

Guilherme Zaia — Thu, 12 Feb 2026 00:57:05 +0000

The Overengineering Trap in MVPs

In today's tech landscape, it's all too common to see projects overengineered, even for Minimum Viable Products (MVPs).

As a senior developer, I've seen how much complexity can actually hinder product delivery. The truth? A seasoned dev can whip up a solid MVP in just a few hours if they focus on the essentials.

Key Points:

Understand the Goal: The MVP should deliver value and gather feedback without the bells and whistles.
Simplicity is Strength: In the rush to include features, we often overlook that less can be more. A well-structured, clean codebase will serve better than intricate microservices in these early stages.
Focus on Learning: Aiming for perfection in the initial version can lead to analysis paralysis. Launch fast, learn, and iterate based on real user feedback.

Conclusion

Don't let the allure of trendy tech stacks and complex architectures distract you from the core purpose of an MVP. Keep it straightforward, ensure robustness, and remember: the goal is to solve problems, not create more.

Why Monoliths Make Sense for MVPs

Guilherme Zaia — Wed, 11 Feb 2026 21:28:14 +0000

Insight: Monolith vs Microservices for MVPs

In the world of tech, especially for MVPs, choosing between a monolithic architecture and microservices can be a dilemma. Here's why I firmly believe that a monolith is often the best choice for MVPs:

Simplicity: A monolith allows you to focus on building a cohesive product without the overhead of managing multiple services. This leads to faster iterations and a smoother development process.
Reduced Complexity: Microservices can complicate even simple projects. You risk overengineering, which can divert attention away from the core functionality that needs validation.
Faster Time to Market: Getting an MVP out quickly is crucial for testing market viability. A monolithic architecture allows for rapid deployment without the need to orchestrate complex service communications.
Easier Debugging: With everything in one codebase, troubleshooting becomes a lot simpler. No need to jump between services to find where things are breaking.

In the early stages, the priority should be validating your product idea, not battling with the architecture. So, before diving into microservices, think about your actual needs.

In practice, less truly is more when it comes to MVP development. Let's not overcomplicate it!

Hello, dev.to! I’m hybrid: 13 Years of Design, C#, and AI.

Guilherme Zaia — Wed, 11 Feb 2026 15:16:42 +0000

They say you have to choose a side: Design or Engineering. I’ve spent the last 13 years proving that’s a false dichotomy.

Hi, I'm Guilherme Lorenz, but you can call me @theminimalcreator. I’ve just rebranded my digital presence to reflect exactly what I do: building robust, minimal, and high-impact digital products.

My Journey in a Nutshell 🛠️

I didn't start with code. For 7 years, I was a Product Designer. I learned the hard way that if the user doesn't understand it, it's broken. But I also realized that if the backend is slow or unreliable, the most beautiful UI in the world can't save the experience.

So, I went deep into Engineering. For the past 6 years, I’ve been architecting systems using the robustness of C# and .NET—because when things are critical, strong typing and solid structure beat the "hype of the week" every time.

What I’m Fighting Against (The "Common Enemy") 🚩

Showcase Complexity: I’m the guy who will advocate for a well-made Modular Monolith over 20 microservices that just add latency, cost, and overhead.
"Prompt" Developers: AI is a powerful tool, not a replacement for logic. I teach AI at EBAC, but I always tell my students: Understanding SOLID and Debugging is what pays the bills when the AI fails at 3 AM.
Tech vs. Design Silos: Devs should care about UX. Designers should understand technical feasibility. I live in the bridge between these two worlds.

What You Can Expect From Me Here ✍️

I’m here to share "In the real world" insights. No empty buzzwords like "disruptive" or "synergy." Expect articles about:

Pragmatic .NET Architecture: Keeping things robust but simple.
AI Implementation: Building RAGs and agents that actually work in production environments.
The UX of Backend: Why performance and latency are core design features.
Klotar Studio Backstage: Real-world problems we solve every day for our clients.

Let’s Connect!

I’m always down for a deep talk about architecture, minimalist engineering, or why C# is still the king of corporate backends.

Currently: Founder @ Klotar Studio & AI Tutor @ EBAC.
Hacking on: Refining LLM latency for enterprise-grade agents.

Drop a comment below: Are you a specialist or a generalist? Let's debate!