Software Architect / Engineering Manager

Hi, I’m

Jeffry Isaac Cascante Vargas.

Senior Software Engineering Manager & Software Architect

15+ years in software development and technical leadership. I design .NET architectures, modernize enterprise systems and integrate artificial intelligence into software solutions.

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Professional photo of Jeffry Cascante
  • 15+. years in software development and technical leadership
  • .NET C#, ASP.NET Core and Clean Architecture
  • AI. LLM, RAG, embeddings and MCP
01 / About

Engineering with an architect’s mindset

I’m a software engineer with 15+ years of experience building systems and leading technical teams. My work combines software architecture, backend development with C# and .NET, and engineering team leadership.

I focus on modernizing enterprise applications and systems, on security and identity with Keycloak, OAuth2 and OpenID Connect, and on applying artificial intelligence —LLM, RAG, embeddings and MCP— in real-world software solutions.

Role
Senior Software Engineering Manager
Architecture
Software Architect · Clean Architecture
Experience
15+ years
Focus
.NET · Data · Identity · AI
02 / Experience

Areas of expertise

  1. 01

    Team leadership

    Technical direction and leadership of software engineering teams.

  2. 02

    Software architecture

    Solution design with Clean Architecture for enterprise systems.

  3. 03

    Application modernization

    Evolving enterprise systems toward modern platforms with .NET and ASP.NET Core.

  4. 04

    Identity & security

    Authentication integrations with Keycloak, OAuth2 and OpenID Connect.

  5. 05

    Artificial intelligence

    Solutions with LLM, RAG, embeddings and MCP, including multitenant architectures.

  6. 06

    Integration & delivery

    APIs, integrations, automation and CI/CD on Docker and Linux.

03 / Skills

Stack & expertise

Platform

  • C#
  • .NET
  • ASP.NET Core

Architecture

  • Software architecture
  • Clean Architecture
  • Enterprise systems
  • Modernization

Data

  • PostgreSQL
  • Oracle
  • SQL Server

Identity

  • Keycloak
  • OAuth2
  • OpenID Connect

Artificial intelligence

  • LLM
  • RAG
  • Embeddings
  • MCP
  • Claude
  • Codex
  • Ollama
  • LM Studio
  • Pinecone
  • LLM APIs

Infrastructure & delivery

  • Docker
  • Linux
  • CI/CD
  • APIs
  • Integrations
  • Automation
04 / Projects

Featured projects

Artificial intelligence · Open source

BuildingWithClaudeAPI

C# / .NET version of Anthropic’s Building with the Claude API course: the course exercises ported to .NET with Anthropic’s official NuGet package.

  • C#
  • .NET 10
  • Claude API
  • LLM
View on GitHub ↗

Security

VulnMatter

Vulnerability and dependency prioritization.

  • Vulnerabilities
  • Dependencies
  • Prioritization

Enterprise platforms

FASI

Development of FASI enterprise platforms.

  • Enterprise systems
  • Architecture

Identity

Keycloak integrations

Authentication integrations with Keycloak.

  • Keycloak
  • OAuth2
  • OpenID Connect

Artificial intelligence

Multitenant AI & RAG

Artificial intelligence and multitenant RAG solutions.

  • LLM
  • RAG
  • Embeddings
  • Multitenant
05 / Certifications

Certifications

Anthropic

Claude Code in Action

· Verify ↗

Anthropic

Claude Code 101

Anthropic

Claude 101

Anthropic

Introduction to Claude Cowork

Anthropic

AI Fluency: Framework & Foundations

Udemy

Team@Work SSDLC: Curso para Jefes de Proyectos

· 1 h · Verify ↗

Udemy

Team@Work SSDLC: Jefes de Programación, Complementario

· 41 min · Verify ↗

Udemy

Team@Work SSDLC: Curso de Arquitectura

· 1 h · Verify ↗

Udemy

Team@Work SSDLC: Seguridad Técnica

· 1 h · Verify ↗

Udemy

Team@Work SSDLC: Privacidad y Datos Personales

· 27 min · Verify ↗

Udemy

SSDLC para Jefe de Programación y Programadores

· 38 min · Verify ↗

Udemy

Curso Base Team@Work SSDLC In Motion

· 38 min · Verify ↗

Udemy

ASP.NET Core Clean Architecture y Domain Driven Design (DDD)

· 13.5 h · Verify ↗

Udemy

ASP.NET Core Clean Architecture 2 | Specification | GraphQL

· 8 h · Verify ↗

Udemy

Iniciando con Containers en Docker

· 2.5 h · Verify ↗

Tecnológico de Costa Rica

Conceptos básicos de inteligencia artificial

· 12 h

Universidad Fidélitas

Especialización en Ciberseguridad

· 80 h

Universidad Fidélitas

Criptografía

· 20 h

Universidad Fidélitas

Informática Forense

· 20 h

Universidad Fidélitas

Ethical Hacking

· 20 h

Universidad Fidélitas

Principios de Ciberseguridad

· 20 h

INA

Operador(a) de Tecnologías de Información y Comunicación

· 260 h

Cisco Networking Academy

Cybersecurity Essentials

MICITT · Cisco Networking Academy · UTN

Introducción a la Ciberseguridad

· 40 h

Cisco Networking Academy

Introducción a la Seguridad Cibernética

Cisco Networking Academy · OpenEDG Python Institute

PCAP: Programming Essentials in Python

06 / Beyond the code

Security & community

  • CTF

    Capture The Flag on Hack The Box

    Solving CTF challenges and labs on Hack The Box to keep offensive and defensive skills sharp.

    • Hack The Box
    View my Hack The Box profile ↗

  • Open source

    Open source at UCR

    Participation in open source initiatives of the University of Costa Rica (UCR).

    • UCR

  • Research

    Code security research

    Secure code review, vulnerability analysis and ethical hacking.

    • Ethical hacking

  • Reversing

    Reverse engineering

    Analyzing binaries and systems to understand how they really work.

    • Binaries

  • Home lab

    Home automation

    Smart home projects and automation of everyday tasks.

    • Automation

  • Community

    Hacker community

    Active member of the hacker and security community: sharing, learning and collaborating.

    • Security

  • Off-screen

    Gardening

    Taking care of my garden: a hobby away from the keyboard that also takes patience and iteration.

07 / Articles

Articles

No articles published yet.

08 / Contact

Let’s talk

Working on an architecture, modernization or artificial intelligence project? Get in touch.

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