Jeffrey Quemuel
“No API? I build one. No workflow? I automate it. No prompt? I engineer it.”
Production-grade automation for multi-market e-commerce.
3.4M+ orders synced across Shopee, Lazada, and BigQuery.
Hello, I’m
Jeffrey Quemuel
AI Systems Engineer · Remote from the Philippines
I'm an AI Systems Engineer based in the Philippines. I split my work across three lanes. The first is e-commerce automation across Shopee, Lazada, and TikTok Shop, where I sync millions of orders and track thousands of SKUs every day without anyone needing to babysit it. The second is full-stack apps and CRM tooling, including a live multi-tenant SaaS at AutomaQue CRM and HubSpot enrichment pipelines for music PR clients. The third is AI-system design, where I build named, structured agent teams instead of writing one-off prompts.
What I actually like is the hard part most engineers skip. Reverse-engineering undocumented APIs by reading the network traffic. Writing the request-signing and OAuth refresh logic by hand when there is no SDK. Building retry systems that survive when a vendor API goes down and pick up exactly where they left off. Wrapping command-line tools in small web services when my workflow tool cannot reach them on its own. Designing AI agents that hold their character across long sessions because the memory and prompts are architected, not improvised.
My team is QoreX. Five Claude-based agents I built and work with daily. Storm brainstorms with me. Rune writes the technical specs. Forge ships the code. Echo keeps the memory honest. Hiru drafts every word I send out. I ran the whole team today to ship the page you're on. The AI Agents tab has the longer story.
Last updated: May 2026
Services
Multi-Agent AI Systems
Custom multi-agent Claude pipelines with shared memory and structured handoffs. Brainstormer, prompt architect, builder, archivist, outward voice; each agent has a defined role and reads from one append-only brain. The QoreX five-agent system runs my daily work and shipped the page you're reading.
Get a Quote →n8n Workflow Automation
Self-hosted n8n deployments, custom JavaScript Code nodes, polling state machines, retry logic with exponential backoff, webhook pipelines. From messy ops to hands-off automation.
Get a Quote →Marketplace API Integration
Shopee Open API, Lazada Open API, TikTok Shop. HMAC/SHA256 signing, OAuth2 refresh flows, paginated order sync, rate-limit handling. Multi-market, production-ready from day one.
Get a Quote →Data Pipelines & BigQuery
BigQuery aggregation, Google Sheets sync, real-time SKU dashboards. Turn raw marketplace data into live business intelligence that stakeholders actually use.
Get a Quote →Full-Stack SaaS Development
Multi-tenant Next.js applications deployed on Vercel. NextAuth authentication, BigQuery and Google Sheets data layers, n8n-driven background jobs, AI chat tabs that replace dashboard queries for non-technical teams. AutomaQue CRM is live at automaque-crm.vercel.app and serving real users today.
Get a Quote →Prompt Engineering & AI Agents
Custom Claude and GPT agents with defined roles, voice, and memory. Each agent reads from a shared brain so context never disappears between sessions, with anti-contamination guards and prompt caching for cost control. The QoreX five-agent team is my proof of concept; your team is your business.
Get a Quote →Custom Desktop Tools
Floating widgets, system-tray utilities, and overlay apps for daily-driver workflows. Electron and PyQt6 builds with offline mode, multi-timezone clocks, embedded webviews, and integrations to ClickUp, Gmail, and Calendar. Tasq Tab is in production with around 10 daily users; QolAssist runs as a Windows speech-to-AI overlay.
Get a Quote →Recent Projects
Automations and products running in production today. Tap any card to read the full story.
Experience
Software Developer | AI Automation Engineer | Data Expert
Current- ▸Architecting n8n workflow for HubSpot artist-contact enrichment: deep web search + AI extraction auto-populates each artist's music label into the Company Name field, replacing manual research of hundreds of contacts
- ▸HubSpot Private App integration: contacts.read + contacts.write scopes, anti-contamination checks, 'None' fallback when no label is found
- ▸Workflow architecture finalized (v2); prompt-engineering and rollout in progress
AI Systems Engineer
- ▸Reverse-engineered undocumented export API; eliminated manual reporting for 5,461+ SKUs
- ▸Architected multi-market Historical Sales Dashboard (3.4M+ orders, 15,946 SKUs across SG/MY/TH)
- ▸Built production Shopee/Lazada workflows: HMAC/SHA256 signing, OAuth2 refresh, paginated sync, daily revenue aggregation
- ▸Integrated AI-powered natural-language query layer over live sales data
- ▸Designed fault-tolerant patterns: exponential backoff, idempotent execution, cross-iteration state persistence, dev/prod separation
- ▸Diagnosed and resolved 10+ production-blocking n8n issues
Freelance AI Automation Specialist
- ▸Delivered custom n8n workflows for e-commerce clients: order mgmt, inventory sync, CS triggers, multi-platform aggregation
- ▸Built Shopee/Lazada integrations from scratch for clients without in-house tech teams
- ▸Developed BigQuery → Google Sheets pipelines replacing manual spreadsheet updates
- ▸End-to-end consulting: scoping, architecture, custom JS Code nodes, Docker self-hosted deploy, handoff documentation
Android App Developer
- ▸Custom Android app development for clients - from concept through Play Store delivery
From Discovery Call to Live Production
The five stops every project moves through. No surprises, no consultant theater.
30-minute scope chat. We pinpoint the bleeding workflow.
I map angles, score paths, then carve a tight build spec.
Vertical slices, real tests, honest logs every step.
Ship to production with monitoring and a rollback plan.
Tune, extend, and keep the workflow healthy as scale grows.
30-minute scope chat. We pinpoint the bleeding workflow.
I map angles, score paths, then carve a tight build spec.
Vertical slices, real tests, honest logs every step.
Ship to production with monitoring and a rollback plan.
Tune, extend, and keep the workflow healthy as scale grows.
Powered by QoreX. Meet the team →
Let’s Build Something That Runs Itself
Tell me what’s breaking, bleeding hours, or just needs to work without anyone touching it.
Book a Discovery Call
Pick a time that works for you. We’ll scope the bleeding workflow and map next steps — no commitment.
Book a Call →30-minute discovery call. We discuss your automation needs, timeline, and next steps - no commitment.