Hector Alfaro

👋 Hi! I'm Hector.

I build stellar software and create unique learning experiences.

I'm a former GitHub engineer who worked on AI-assisted code reviews. I have deep experience in teaching and learning, and launched GitHub's global certification program.

View LinkedIn ↗ Resume Say hello

Skills

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Go TypeScript Ruby Node.js JavaScript Code review AI-assisted tooling Developer docs Root-cause debugging Mentoring Instructional design Training & certification English / Español

Selected Work

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A Copilot code review comment on a pull request, flagging a typo and a scoring bug, with a suggested fix and an Apply suggestion button

PR Reviews with Copilot

I worked on the Copilot Code Review pipeline in Go/Ruby and its surfaces in TypeScript. Copilot Code Reviews are LLM-enabled code reviews of code pushed to GitHub Pull Requests.

docs.github.com ↗

The GitHub Learning Lab course builder, showing a course's config.yml and a form for editing a step's title, description, and trigger

GitHub Learning Lab

Took GitHub Learning Lab from discovery through delivery. Built the product and its content. Today, it's evolved into GitHub Learn.

learn.github.com ↗

Four GitHub certification badges: GitHub Foundations, GitHub Actions, GitHub Advanced Security, and GitHub Admin

GitHub Credentials

I founded GitHub's global certification program: defined the vision, owned the curriculum and assessment development processes, and spun up products to support learners' journeys. It's now a part of GitHub Learn.

learn.github.com/credentials ↗

The GitHub Docs logo and wordmark

docs.github.com

I was a core engineer on the Docs team. I worked with teams of product managers, engineers, and technical writers to ship documentation that helps millions of users daily.

docs.github.com ↗

glo.bar rider list screen, showing six riders with onboard times and signal status
glo.bar rider detail card for a rider named Marcus, with a signal-back action

glo.bar

Personal project. Social networking app that's proximity-based, built with React + Vite + TypeScript, and backed by Supabase.

Experience

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2022 — 2025
Software Engineer III · GitHub

AI-assisted PR code review deployed across 8M+ pull requests, built in Go, Ruby, TypeScript; developer docs.

2018 — 2022
Senior Program Architect · GitHub

Founded GitHub's certification program; built the training catalog from onboarding research.

2008 — 2018
Associate Professor & Instructional Designer · Valencia College

Taught 50+ sections to 1,200+ students; ran the LMS for 72,000+ people.

Contact

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