Arvin Mondano

AI & Machine Learning Engineer

Full-stack Engineer

Backend Engineer

Cebu City, Central Visayas, PH

SQLite

Javascript

REST

Docker

JavaScript

Claude

DigitalOcean

Airtable

Zapier

SQL

Node.js

Webhooks

Next.js

React

TypeScript

Python

Available for hire fromNegotiable

Buy back 10-20 hrs/week | Voice Agents · Cold Outreach Pipelines · Sales Automation · Full-Stack | Remote Worldwide

Buy back 10 to 20 hours of your week. That's what happens when the back-office work running your business stops being your work. I design and ship voice agents, end-to-end automations, and full-stack applications for SMB founders across the US, UK, Canada, Australia, and the Philippines. Every build follows the same shape: → Starts with a baseline of your current hours and cost — so the ROI is measurable from day one → Ships fast, documented clean → Handed over so your team owns it after launch — no permanent dependency on me Specialties: Voice Booking Agents (lead → booked in 60 sec), Cold Email Drafters (100+ personalized in 10 min), 24/7 Sales Pipelines, document processing, inbox triage, and multi-branch retail operating systems. Common stack: n8n · GoHighLevel · Claude · Vapi · ElevenLabs · Next.js · TypeScript · Python.

Projects

Voice Booking Agent — Lead to Booked in 60 Seconds

A growing service business loses 60% of inbound leads in the first hour — every minute that passes after a form submission cuts conversion in half. I built an outbound voice agent that closes that gap: → Inbound form submission triggers an automated call within 60 seconds → A 90-second qualifying conversation captures 7 structured fields (timeline, budget, location, intent, decision-maker, urgency, contact preference) → Qualified leads are booked directly into the owner's calendar — no human in the loop → Disqualified leads get a polite follow-up SMS Live results from the reference build: ✓ Form submission to booked call: under 60 seconds end-to-end ✓ ~$0.35 per call (telephony + STT + LLM + TTS combined) ✓ Zero missed calls, zero phone-tag, zero "we'll get back to you" friction Stack: Vapi · GPT-4o · ElevenLabs Flash v2.5 · Deepgram Nova-3 · n8n · GoHighLevel · Twilio Shipped with a 90-second walkthrough Loom and full configuration documentation. Handed over so the client's team operates it without me.See More

24/7 Outbound Sales Pipeline — Cold Lead to Booked Discovery Call

A B2B founder spends 2-3 hours per day prospecting, writing personalized outreach, chasing follow-ups, and trying to book discovery calls — and still has gaps because manual outbound doesn't sleep, but founders do. I built an end-to-end Sales Pipeline that runs the whole motion: → Hub-and-spoke architecture: a parent orchestrator routes each lead through specialized sub-workflows (hook writer · evaluator · sender · responder · booker) → Cold lead enters the funnel via Airtable or scrape → AI generates a personalized outreach message — scored by a separate evaluator agent before send, which catches 8/9 quality violations a single-agent setup would miss → Multi-channel: cold email, IG/FB DM, and follow-up sequences — same orchestrator, different sender modules → When a lead engages, the responder qualifies in conversation and books straight into the calendar via CRM integration → Opportunity stage advances automatically: New Lead → Qualified → Booked → Showed → Closed Production state: ✓ Phase 7 shipped end-to-end ✓ 5 specialized sub-workflows + test harness, all live ✓ E2E test verification: 3/3 passing ✓ Tagged outputs: tier-fit, timeline-urgency, channel-source ✓ ~5× main-agent token reduction vs. monolithic single-agent setup Stack: n8n · GoHighLevel · Claude · Airtable · Gmail/Meta APIs Production-grade architecture, documented handover, designed for non-technical operators to run day-to-day.See More

Cold Email Drafter — Outreach at Scale

A manual cold-email run for a small B2B agency: 100+ prospects researched individually, subject lines written from scratch, bodies tailored to the recipient's company and role. Total time: 6-8 hours of senior-level work. Total cost in fully-loaded labor: $200-400 per batch. I replaced that with an automation pipeline: → Prospect list flows from Airtable into a structured prompt → The model generates subject line, body, and signature — each grounded in the prospect's role, vertical, and a peer-voice rather than corporate-voice tone → Output writes back to Airtable and creates a Gmail draft, linked back to the source record for one-click human review → Sender reviews and sends — no auto-blast, so deliverability and reply quality stay protected Live results from the production run: ✓ 114 personalized drafts produced in one batch ✓ Total runtime: ~10 minutes ✓ Total inference cost: $0.17 Stack: n8n · Airtable · Claude · Gmail API Replaces a full senior-level day of work for the cost of a vending machine snack — same personalization quality, 50× throughput.See More

Multi-Branch Retail Operating System — Live, Zero Downtime

A multi-branch retail client needed to run inventory, sales, and back-office from a single screen — across staff with different access levels, from devices with patchy internet, with a clean audit trail and one-tap digital payments at checkout. I designed and shipped the full platform: → Inventory management with stock-level alerts, batch import, and barcode-driven entry → Role-based access control: cashier · supervisor · branch manager · owner — each surface scoped to what they're allowed to see and do → Offline mode that queues every transaction locally and syncs the moment connectivity returns → Audit trail on every action — full traceability for end-of-day reconciliation → One-tap digital payment integration with a local payment provider → Owner dashboard surfaces revenue, top SKUs, and stock-out alerts across all branches in one view 35+ features shipped. Live since launch with zero downtime. The owner now runs the entire back office from one screen. Stack: Next.js · TypeScript · Node.js · SQLite · Tailwind Built as a production system with documented handover — operated daily by non-technical staff across multiple branches.See More

Work History

Independent Automation Consultant

Self-employedFreelancerDesign and ship voice agents, end-to-end automations, and full-stack applications for SMB clients across the US, UK, Canada, Australia, and the Philippines. Every build follows the same shape: → Starts with a baseline of the client's current hours and cost — so the ROI is measurable from day one → Ships fast, documented clean → Handed over so the client's team operates it after launch — no permanent dependency on me Specialties: cold outreach pipelines, inbound lead qualification, inbox triage, document processing, CRM automation, and multi-branch retail operating systems. Stack: n8n · GoHighLevel · Claude · Vapi · Next.js · TypeScript · Python · Airtable.

Education

Silliman University

Bachelor of Computer Science, Bachelor of Computer Science2021 - 2025

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