Angelo Castro
I build the quiet machinery behind busy businesses: AI agents that pick up the phone, n8n workflows that never forget a follow-up, and GoHighLevel systems a team can actually run.
Right now I'm at TaskBlockingAi, teaching the work that piles up every Monday to file itself. Between builds, I study computer science at the University of Makati.
TaskBlockingAi
GHL automation
Duloft Residences
AI automation
University of Makati
BS Computer Science
experience
linkedin (opens in a new tab)2026GoHighLevel Automation Specialist and AI Content Generation SpecialistTaskBlockingAiTaskBlockingAi
Full-time · Remote · Jul 2026 - Present
GoHighLevel SaaS and CRM architecture, voice AI and the marketing automation stack for an AI agency.
- Built and launched the agency's GoHighLevel SaaS setup: sub-account provisioning, snapshots, and A2P 10DLC brand and campaign registration.
- Connected Retell AI voice agents to GoHighLevel dashboards with Custom Objects, syncing call logs, transcripts and agent performance into client records.
- Designed multi-step n8n workflows, API endpoints and webhook routing that keep data in sync across platforms.
- Built the full marketing automation stack: multi-channel lead capture, pipeline routing, scheduling and client onboarding.
- GoHighLevel
- n8n
- Retell AI
- Webhooks
- A2P 10DLC
2026GoHighLevel and AI Automation SpecialistDuloft ResidencesDuloft Residences
Part-time · Jan 2026 - Present
GoHighLevel operations and AI messaging for a residential property portfolio.
- Set up GoHighLevel operations for a residential property portfolio, tightening the data loops that keep vacancies low.
- Designed property websites synced with GoHighLevel lead capture, pipelines and automated scheduling.
- Built multi-channel AI messaging for guest inquiries, lead nurturing and viewings, cutting manual tenant messages.
- GoHighLevel
- AI messaging
- Websites
2026Front-End Developer and Automation SpecialistHeronsHubHeronsHub
Gig · Mar 2026 - Jul 2026
SEO-focused Next.js landing pages and admin automations.
- Hand-coded fast, SEO-focused landing pages in Next.js.
- Added real-time data syncing and automated notifications that cut manual admin work.
- Next.js
- Technical SEO
- Automations
2025Advanced n8n and Backend Automation SpecialistHarris AutomationsHarris Automations
Contract · Nov 2025 - Jan 2026
Production n8n backends for AI agencies.
- Built production n8n backends with multi-branched workflows that scale client fulfillment for AI agencies.
- Integrated custom APIs and webhooks that connect client CRMs to AI agents and cloud databases.
- n8n
- APIs
- Webhooks
2024BS Computer ScienceUniversity of MakatiUniversity of Makati
Education · Makati · Aug 2024 - Present
Bachelor of Science in Computer Science.
projects
all projects- read case study: Employee QR Code Review Tracking and Reward System
GoHighLevel
Employee QR Code Review Tracking and Reward System
A gamified GoHighLevel reputation engine that tracks employee-specific Google reviews over time, automatically increments their individual tallies, and displays a live company leaderboard directly inside the GHL dashboard to drive friendly team competition.
50 reviews / month total Review Volume
read case study
- read case study: AI Chatbot (FB, Chat Widget) Appointment Setter With Live Database connection (Google Sheets)
AI agent
AI Chatbot (FB, Chat Widget) Appointment Setter With Live Database connection (Google Sheets)
This automated system acts as an inventory-intelligent booking agent, seamlessly linking **GoHighLevel** with a live **Google Sheets** database to query real-time unit availability during active customer conversations. As prospects interact, the system dynamically shifts their CRM pipeline stages based on their intent, guiding them smoothly toward automated appointment booking. Once a slot is secured, it instantly updates the Google Sheet to reserve the unit—preventing double-bookings—and triggers a multi-channel reminder sequence to guarantee high show-up rates on complete autopilot.
98% lead Response Time
read case study
- read case study: Database Reactivation With Coupon Code Generation & Tracking
GoHighLevel
Database Reactivation With Coupon Code Generation & Tracking
A smart GoHighLevel automation that safely revives cold leads by filtering out unhappy past customers, dynamically generating unique, single-use discount codes, and tracking conversions to maximize hands-free revenue.
+232% increase database Reactivation Rate
read case study
certifications
n8n
‹ verify › n8n (opens in a new tab)JavaScript
‹ verify › JavaScript (opens in a new tab)Claude
‹ verify › Claude (opens in a new tab)Python
‹ verify › Python (opens in a new tab)SEO On-Page Optimization
recommendations
Honestly, I was skeptical about how much AI could actually do for a hands-on business like property rentals, but AJ proved me completely wrong. He didn't just set up GoHighLevel; he custom-built a system tailored perfectly to my workflow. The website looks incredible, and the automated AI responses are so natural that my tenants don't even realize they're talking to a system initially. AJ made the whole transition seamless and stress-free. Truly top-tier work!
Jorge CastroOwner, Duloft Residences What I liked most about working with AJ was his systematic approach. He didn't just build a custom landing page; he ensured it followed technical SEO best practices for performance and then engineered the entire n8n automation ecosystem behind it to handle our admin processes. He accounted for edge cases, set up clean data loops, and delivered a highly stable system.
John Christopher DiazLead Developer, Herons' Hub If you need someone who actually understands n8n architecture, data mapping, and working with complex JSON structures, [Your Name] is excellent. They helped us re-engineer a messy internal pipeline into a collection of clean, modular sub-workflows. The logic is easy to follow, it runs efficiently, and their documentation was thorough. I’d absolutely hire them again for backend work.
Finn HarrisCEO, Harris Automations