Juan Peláez — home Juan Peláez

Thursday, November 12, 2026 · Boulder, Colorado

Technical Deep Dives

The Technical Deep End

Hard-core technical content on distributed systems, architecture patterns, and engineering solutions that scale.

What I do

The work behind these essays.

Architecture Review & Optimization

A deep-dive technical assessment:

  • Architecture audit
  • Performance bottlenecks
  • Scalability and reliability improvements
  • A migration plan

About architecture reviews

AI Systems in Production

Building reliable AI systems in real life:

  • Model versioning and deployment pipelines
  • Monitoring model performance and drift
  • Scaling inference infrastructure

About AI strategy

Technical Due Diligence

For investors and acquirers:

  • Code quality
  • Architecture
  • Team and stack risk, in a comprehensive report

About due diligence

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AI

13 essays

Technical

Make your AI agents remember better with a Karpathy wiki

I have been using personal AI agents from Meta and X for the last couple of months, and yes, they do have memory. But I could not read that memory, check it, or keep it the same way in both agents.

October 26, 2026

Technical

Running AI Locally: What NotoNote Keeps on Your Machine

NotoNote captures, transcribes, and summarizes meetings on your own machine: Whisper.cpp transcription, a bundled Ollama runtime, and an embedded FluidMind LLM engine on the way. The cloud is for sync, not for listening in.

October 24, 2026

Technical

AI Maestro: a dashboard for a team of agents

Most AI agent demos are a video and a waitlist. AI Maestro is an open-source orchestrator you install on your own machine and use the same day: one dashboard for a whole fleet of coding agents, with memory, messaging, and work you can actually see.

October 23, 2026

Technical

Crabmail: email for agents

Agents need addresses, not just chat windows. Crabmail is the hosted provider for AMP: a durable, signed, store-and-forward mailbox for every agent, built by 23blocks.

October 23, 2026

Technical

Lola, and the Lolabots Factory

Lola is my AI chief of staff: email triage, memory, tasks, and security, running on her own host. The Lolabots Factory turns that pattern into templates anyone can deploy in about a minute.

October 23, 2026

Technical

Using ChatGPT in my daily Job as Software Developer.

For the last couple of weeks, I have been using ChatGPT (the Artificial Intelligence Text Generator) for some of my tasks as Software Developer on multiple projects. This article shows some conclusions on the good and bad results and some recommendations to fellow developers.

February 17, 2023

Cloud

6 essays

Cloud

AWS Amplify running Angular 17

Very quickly, if you are running Angular 17 on AWS Amplify you need to set up your build environment with these parameters:

January 31, 2024

Cloud

Year 1. About Infrastructure

At 23blocks, we are about to celebrate our first operational year in just a few days. It is a good time to share some reflections on what we learn and how our operational model has been useful for our clients and their users.

February 17, 2023

Cloud

AWS ALB Health Check for multiples app or services on NGINX

There are many reasons to deploy multiple apps or services on an NGINX AWS EC2 instance, from cost savings to redundancy. In our case, we have an Application Load Balancer handling all requests to a Target Group (or Server Farm).

February 9, 2022

Cloud

Angular Apps on AWS EC2 with NGINX

We have multiple options to deploy Angular apps, services like Netlify, AWS Amplify, and many others. however, there are cases when we still need to run our Angular apps on ECS instances. (Maybe a compliance requirement like Web Application Firewall - WAF -, or similar)

November 16, 2020

Cloud

Using LiveMesh for Remote Work at 3Metas

Back to Technical Cloud October 21, 2009 Using LiveMesh for Remote Work at 3Metas How 3Metas leveraged Microsoft LiveMesh to enable distributed team collaboration in 2009,…

October 21, 2009

WCF

5 essays

WCF

From WCF on-premise to Azure App Service. Part II

In Part I, we discussed the case of moving Windows Communication Foundation (WCF) services to Azure App Services. In Part II, we are discussing the particular requirement of integrating Azure Application Insights using Application settings for the Log Level and Instrumentation…

April 17, 2023

WCF

From WCF on-premise to Azure App Service. Part I

During the last few months, I have been working on migrating a Windows Communication Foundation Service to Azure App Service, this post series summarizes a few learning lessons and references for the case of moving legacy .Net 4 WCF Services to the cloud with Azure App Services.

April 11, 2023

WCF

Multicast Message Routing with WCF 3.5

Back to Technical WCF December 5, 2010 Multicast Message Routing with WCF 3.5 Implementing distributed architectures with multicast routing in Windows Communication Foundation 3.5.

December 5, 2010

WCF

Adding Custom SOAP Headers in WCF 3.5

Back to Technical WCF December 5, 2010 Adding Custom SOAP Headers in WCF 3.5 Programmatically adding custom headers to SOAP messages in Windows Communication Foundation enables…

December 5, 2010

WCF

Windows 7 and Mobile Device WCF Issues

Back to Technical Posts Windows Mobile WCF Windows 7 and Mobile Device WCF Issues September 14, 2009 Quick Fix: NetCFSvcUtil.exe has compatibility issues with Windows 7 when…

September 14, 2009

DevOps

4 essays

DevOps

Capistrano Deployment. Restart systemd and NGINX Services.

For the last few months, our team at 3Metas has been building a few SaaS solutions. Our engineering team delivers our APIs multiple times every day using Capistrano for our deployments, however, finding the right approach to restart the puma services registered with systemd (on…

October 26, 2020

DevOps

Configuring Remote TFS Access Credentials

Back to Technical DevOps February 28, 2010 Configuring Remote TFS Access Credentials How to Stop TFS from Asking for Your Password Every Time Working with cloud-hosted Team…

February 28, 2010

Database Security

1 essay

Database Security

Hacking SQL Server 2008 (Kind of…)

Back to Technical Database Security September 23, 2012 Hacking SQL Server 2008 (Kind of…) During SQL Server 2008 installation, it's easy to skip the steps for properly…

September 23, 2012

Entity Framework

2 essays

Entity Framework

Using Raw SQL with Entity Framework

Back to Technical Entity Framework April 23, 2012 Using Raw SQL with Entity Framework When using Entity Framework with Code First, LINQ is generally used to have the DBContext…

April 23, 2012

Mobile OS

1 essay

Mobile OS

Windows Phone Mango: First Impressions

Back to Technical Mobile OS October 3, 2011 Windows Phone Mango: First Impressions My HTC HD7 just updated to the latest version of Windows Phone 7 (Mango), perfectly timed with…

October 3, 2011

Speaking

4 essays

Speaking

Publicar - Social Media 101

During the innovation workshops run by the Publicar S.A. team, we received the invitation to deliver our Introduction to Social Media talk.

August 21, 2011

Speaking

Legis - Social Media 101

Legis's innovation committee invited us to present our vision of social media and its impact on different industries.

August 19, 2011

Speaking

SIIGO - Social Media 101

During the SIIGO Community project we ran the Social Media 101 workshop, a great opportunity for a company with more than 50,000 clients.

March 21, 2011

Speaking

Test Management Event with Visual Studio 2008

Back to Technical Posts Testing Speaking Test Management Event with Visual Studio 2008 December 1, 2008 On November 30, 2008, I presented a session on test management using…

December 1, 2008

Silverlight

1 essay

Silverlight

SplendidCRM with Silverlight 2.0 and Hosting Tricks

Back to Technical Silverlight April 20, 2011 SplendidCRM with Silverlight 2.0 and Hosting Tricks Working with SplendidCRM version 2.1.3074.33397, a powerful .NET-based CRM…

April 20, 2011

Conference

1 essay

Conference

Building for PDC 2008

Back to Technical Conference April 20, 2011 Building for PDC 2008 PDC 2008 was coming, and though I couldn't attend in person, I found another way to participate: by building a…

April 20, 2011

CMS

1 essay

ASP.NET

2 essays

ASP.NET

GridView Breaking Change in .NET Framework 4.0

Back to Technical ASP.NET November 19, 2010 GridView Breaking Change in .NET Framework 4.0 Migrating ASP.NET applications from Framework 3.5 to 4.0 revealed a breaking change in…

November 19, 2010

IIS

1 essay

IIS

IIS7 with WCF Using Non-HTTP Bindings

Back to Technical IIS March 1, 2010 IIS7 with WCF Using Non-HTTP Bindings One of IIS7's most powerful features is support for hosting WCF services with non-HTTP protocols like net.

March 1, 2010

Open Source

1 essay

Open Source

Splendid CRM Version 2.1 Source Code Archive

Back to Technical Posts CRM Open Source Splendid CRM Version 2.1 Source Code Archive June 16, 2009 The team at SplendidCRM released version 3.0, which included a workflow engine…

June 16, 2009

MacBook

1 essay

Distributed Systems

1 essay

SOA

1 essay

Layered Design

1 essay

QA

1 essay

Tutorial

1 essay

Tutorial

jQuery Day 01: Getting Started with DOM Manipulation

Back to Technical Posts JavaScript Tutorial jQuery Day 01: Getting Started with DOM Manipulation November 25, 2008 Starting a new project for Microsoft Colombia and the Health…

November 25, 2008

Training

1 essay

Training

Silverlight Partner Training: Metro Program

Back to Technical Posts Silverlight Training Silverlight Partner Training: Metro Program November 11, 2008 On November 5-6, 2008, I conducted an 8-hour Silverlight training for…

November 11, 2008

Workflow

1 essay

Workflow

SharePoint Workflow: Dynamic Task Assignment

Back to Technical Posts SharePoint Workflow SharePoint Workflow: Dynamic Task Assignment February 22, 2008 First in a series on solving common SharePoint Designer workflow…

February 22, 2008

Troubleshooting

1 essay

Troubleshooting

SharePoint Workflow: Fixing Task Permission Errors

Back to Technical Posts SharePoint Troubleshooting SharePoint Workflow: Fixing Task Permission Errors February 21, 2008 Troubleshooting a frustrating SharePoint Designer workflow…

February 21, 2008

Configuration

1 essay

Visual Studio

1 essay

Debugging

1 essay

Web Forms

1 essay

Web Forms

Master Pages in ASP.NET: Consistent Layout Made Easy

Back to Technical Posts ASP.NET Web Forms Master Pages in ASP.NET: Consistent Layout Made Easy October 29, 2007 ASP.NET Master Pages revolutionized web application development by…

October 29, 2007

Technical

25 essays

Technical

Windows Phone Day 2013

Thanks to the invitation from the Avanet community, I was with Miguel Mendoza and Andres Fontan at the Windows Phone Community Day in Medellin,…

October 5, 2013

DevOps

Setting Up Test Machines with Hyper-V

One of the things that a software developer spends the most time on is testing components, installing patches, platforms, and a thousand other things,

September 17, 2012

Technical

Using LiveMesh in Work Environments.

One of the paradigms that 3Metas (www.3metas.com) is trying to break has to do with physical offices. Most of the people who…

October 21, 2009

Technical

Where Do I Work?

Reading about how to build companies of the future, today I came across this phrase: “In an enlightened company, one that thinks about the future, managers…

April 12, 2009

Technical

My Friends on FaceBook…using PopFly

Today I had a tremendous day (spectacular), thanks in large part to a couple of good friends who made my day, my week and probably my…

December 5, 2008

Technical

JQuery Day 01

I have started a new project for Microsoft Colombia and the Secretary of Health that is at the same time a proof of concept of a migration of a…

November 25, 2008

Technical

Microsoft Developer Evangelist Day 1

Today is my first day as Services Developer Evangelist at Microsoft Colombia, everything has been very orderly, as soon as I arrived they had a folder of…

August 19, 2008

Technical

New Developer Evangelist

On Tuesday, August 18 at 8:30 am I start a new professional challenge as a Developer Evangelist for Microsoft Colombia.

August 16, 2008

Technical

Windows Live API Course in Mexico City

I am in Mexico City to participate in a Windows Live API training. I hope to be able to blog interesting things about it; the last time I…

June 13, 2008

Technical

Using Content Distribution Networks.

For some months now I have been participating in a Big Project for Dunkin Donuts in the United States, basically the construction of the site…

May 16, 2008

Technical

Recognitions.

Selected as Expeditionary in the Windows Vista Odyssey Adventure program, developer of one of the 500 applications that have contributed…

January 3, 2008

Technical

Publications.

Author of the Blog “www.JuanPelaez.com” technical topics related to new technologies on the Microsoft platform, invited to publish in the…

January 3, 2008

Technical

Speaker

I have participated as a speaker at different events for Microsoft Architects, Developers and Business Partners in the Andean Region,…

January 3, 2008

Technical

Certificaciones.

Microsoft Certified Technical Specialist (MCTS) Distributed Applications. Sitecore 5.3.1 Certified Level 2…

January 3, 2008

Technical

Blend 2 December Preview.

The Blend 2 December Preview has been published. To download it you can go to this link. In a quick review to prepare a demo for…

December 12, 2007

Technical

Now Juan Peláez also at Geeks.ms

Thanks to the kind invitation of Rodrigo Corral I will now publish some content at Geeks.ms one of the most active communities in the world…

December 12, 2007

Technical

Lost Performance Explorer Window.

During the Visual Studio Team System presentation in Medellín, I had the opportunity to discuss with Freddy Angarita a problem that occurred in…

July 14, 2007

Database

16 essays

Database

Using PGVector with a multitenant Ruby on Rails App.

This is a short one. When using the pgvector extension to enable vector searches on Ruby On Rail Applications, if the application is also multi-tenant (using Apartment or other similar gem) the normal path to add the extension to the database will be very problematic, and…

January 7, 2024

Database

Geographic Data Worldwide. Part 1

For various reasons, in several client projects we have had to create a list of countries, cities, languages. Now that we are working…

May 22, 2012

Database

Entity Framework Connection Strings

In recent months we have developed at 3Metas several projects using Entity Framework as a data access model, especially I…

April 19, 2012

Database

Running Windows 7 on MacBookPro

Some time ago I bought a MacBookPro computer, and I installed a triple partition system on it, the experience was good but there were days when…

June 7, 2009

Database

Update: Running PHP on IIS 7

A Year ago I wrote some posts about PHP running on a Windows Machine using FastCGI (In fact, PHP running on a Windows Vista or a Windows Server 2008…

October 30, 2008

Database

Alternatives to MySQL

Many times during events and presentations the attendees ask me how they can start developing data-based applications with…

August 26, 2008

Database

Microsoft Activities 2007

Below is the list of the activities I carried out with Microsoft Latam in 2007. Thanks to Sandra Marín, Jorge Oblitas, Ivanov Cepeda, José…

February 22, 2008

Database

Work Experience

Gattaca S.A Operations Manager – Principal Architect (CTO). 2003 – 2007 Responsibilities as Principal Architect (CTO) Design of the…

January 3, 2008

Database

Connecting to Microsoft##SSEE

During the execution of a project, (an eLearning Portal in SharePoint about which more posts will come…), I had some problems with the virtual machine…

November 27, 2007

Database

ISV Strategy Day

During November 2007, and thanks to an invitation from Sandra Marin of Microsoft Andino, I had the opportunity to present, together with Juan Diego Velasco…

November 21, 2007

Database

MIIS What?.

A couple of days ago Miguel Mendoza (The Miguel Mendoza) MVP and one of the DevSynergy guys called me to offer me a little problem with MIIS…

October 29, 2007

Database

Connection to SQL2005 with Java

Ivanov Cepeda from Microsoft Colombia asks me how to connect a Java application to SQL Server 2005. With the help of some of the guys from the…

September 19, 2007

Database

PHP on Windows Vista with FastCGI

With the launch of Windows 2008 Beta 3 (for which Gattaca is an Early Adopter thanks to an invitation from Microsoft Colombia) we have begun the final phase…

August 16, 2007

.NET Development

16 essays

.NET Development

Speeding Up Debugging of the Compact Framework in VS2008

Yes, I know everyone develops on WP7 using VS2011, but for those who have to do a project in VS2008 with Compact Framework 6.5, and there will still be some, either because they reinstalled…

May 28, 2012

iOS Development

Consuming REST Services from iOS 5

Lately I have collaborated on the development of several applications for iOS (versions 4 and 5); these applications consume REST services that…

May 13, 2012

.NET Development

Two new sites

This year (2008) I joined studiocom team delivering 2 sites for McCormick. It is really awesome when you finally see those things go-Live. If you…

April 20, 2011

.NET Development

Vive Windows Vista

Thanks to the kind invitation of Microsoft, the IT-Pros DC community and Bogota DotNet, on Saturday, February 9, I had the opportunity to participate as…

February 5, 2008

.NET Development

.Net Framework Sources

All the sources of the .net framework have been published a few minutes ago, they are available in a good example of software + services using…

January 17, 2008

.NET Development

Microsoft Andean RoadShow 2007

Thanks to the very kind invitation from the Microsoft Andean Platform and Development people, in the coming weeks I will be in Ecuador,…

November 21, 2007

.NET Development

About Juan Peláez

Hello, sometimes it is necessary to write a profile for different things, so here is mine:   “Juan Carlos Peláez is an Architect…

November 21, 2007

.NET Development

Blend – September 2007 Version

Microsoft has published a new version of the Blend version 2 product. The September preview, in this version some new ones have been implemented…

September 24, 2007

.NET Development

New AJAX Toolkit Released

Version 1.0.10920.0 of the AJAX toolkit has been published on CodePlex, a set of controls that, together with the AJAX extensions for ASP.

September 24, 2007

.NET Development

FastCGI in IIS7. (Continued)

This post is a continuation of the previous one about FastCGI and IIS7, in Windows 2008 Beta 3 and Windows Vista, FastCGI is included as native support,…

August 21, 2007

Web Services

14 essays

Web Services

Multicast with WCF 3.5

For Distributed Architecture scenarios with Multicast using WCF 3.5, one possible option is the following: [ServiceContract(Namespace =…

December 5, 2010

Web Services

Adding Headers to SOAP Messages

For different effects (routing for example) it is necessary to add to the SOAP messages managed by WCF services a header…

December 5, 2010

Web Services

Windows 7 and Mobile Devices

Something quick, at @3Metas we have worked a lot in the last few months on the development of applications for mobile devices that run Windows Mobile.

September 14, 2009

Web Services

Layered Architecture.

Taken from The Architecture Guide Version 2.0a from Microsoft's Patterns and Practices group. For those of us who like it in the language of Cervantes:

May 26, 2009

Web Services

PDC 2008 and Me.

PDC 2008 is approaching, the Microsoft conference for professional developers, where all the news of the platform will be shown like…

October 21, 2008

Web Services

Me at PDC2008… in some way

PDC 2008 is coming, I can’t get in, but this time I will send something to represent me and to speak for me: One piece of software made with WPF,…

October 21, 2008

Web Services

Consuming Web Services with Digital Certificates

Back to Technical Posts Security Web Services Consuming Web Services with Digital Certificates August 20, 2008 A common question: How do you call web services secured with…

August 20, 2008

Web Services

Professional Profile.

Software Solutions Architect with extensive experience in supporting organizations' strategic objectives through the design,…

January 3, 2008

Web Services

Silverlight vs Flash

Taken from the Blog of Jesse Ezell, who has had extensive experience in development of tools, projects and solutions using flash. …

September 24, 2007

Web Services

Real Project in Blend

Hello everyone, in the last few weeks we have been developing with the Gattaca design team a Game for one of our clients and we have…

August 14, 2007

Web Services

Visual Studio 2008 Beta 2

Microsoft's development group has released beta 2 of visual studio 2008 as well as the framework update (version 3.5),…

August 6, 2007

Frontend

10 essays

Frontend

As there is a new version of react-navigation (4.0)

As there is a new version of react-navigation (4.0) with some important changes, we thought it would be nice to integrate those in a project created with Ignite (Bowser). So we did it. https://github.com/3MetasOS/React-Native-App .

November 2, 2020

Frontend

New Challenges and many changes.

It is October 20, 2008, it is 9 in the morning. I just received a call confirming a purchase order for 7 thousand dollars. It is the trigger…

October 21, 2008

Frontend

Thank You Studiocom

Today August 15, 2008 is my last day at Studiocom.com. Inc. as an employee of the company (I hope to be able to build other types of relationships in the…

August 15, 2008

Frontend

Courses.

LOCAL DESIGN CHAMPION TRANING, Technical training course on Microsoft tools for developing Interfaces that improve the…

January 3, 2008

Frontend

Moonlight 1.0 no longer needs Mono

One of the characteristics that will make Silverlight really successful is its implementation on different platforms, it is already known that Novell has…

September 24, 2007

Frontend

Silverlight 1.0

Microsoft has announced the release of the final version (1.0) of Silverlight, a plugin for the different internet browsers that allows…

September 10, 2007

Cloud & Infrastructure

1 essay

Logging

Log4Net New Version Release

Instrumentation is a key element in real software application development. When we face an application error in production, on a server or…

September 25, 2013

Mobile Development

1 essay

Security

1 essay

Enterprise

3 essays