01
NOW
Senior Software Engineer · GenAI
I design AI-powered products and multi-agent systems with deterministic validation, traceability, and human decisions at the highest-impact points.
OPEN TO CONVERSATIONS
CARTAGO, COSTA RICA · 9.8642°N / 83.9199°W
FabiánFernández
Senior Full-Stack Engineer
& GenAI Builder
I turn ambiguous problems into clear products: full-stack web platforms, enterprise systems, and AI systems that keep people in control. This is my corner of the internet.
01 / EXPERIENCE
02
PRODUCT ENGINEERING
Full-Stack Engineering
I build across the stack: React/Next.js/TypeScript front-ends and C#/.NET backends, from architecture through delivery and observability.
03
PLATFORM
Cloud & Modernization
I've modernized legacy systems and migrated on-premise platforms to Azure, connecting product, automation, and engineering practices into reliable, operable software.
02 / FEATURED PROJECT
2026HUMAN-IN-THE-LOOP · AGENTIC AI
Software built with agents. Decisions that remain human.
dev-setup is my Claude Code plugin marketplace. Its sprint-runner plugin turns a product epic into shipped, reviewed pull requests through a five-agent pipeline that advances one human-approved step at a time.
VIEW THE PLUGIN ↗INSTALL
# Add the marketplace once per machine.claude plugin marketplace add FabianFdz/dev-setup
# Install the plugin in any project.claude plugin install sprint-runner@fabian-dev-setup
SKILLS
/epic-creatorChallenges a rough idea, then drafts the epic it earns./sprintRuns that epic through the five roles below, pausing for approval at every handoff.
1PLANNER
2ARCHITECT
3CODER
4REVIEWER
5DOCS
03 / WHAT I DO
I design useful, resilient systems that are easy to understand.
AI ProductsAgentic WorkflowsFull-Stack PlatformsArchitectureLegacy ModernizationCloud Delivery
04 / STACK