Zairus Opinion bridges the gap — from ideas to production.

Built for a client who needed a personal health tracking tool. Cycle and symptom logging, predictions, and history view.

Expo, React Native

iRacing telemetry and coaching app built for a sim racer. Real-time delta-to-PB HUD, post-session AI coaching via Gemini, tyre temperature advisor, and automatic setup file installation.

Python / FastAPI backend, React dashboard, PyQt6 HUD overlay

Built for an NZ-based import business

A multi-workflow automation system handling AI-powered DM replies across Instagram and Facebook. Customer messages hit a ManyChat Dynamic Content block, which POSTs to n8n where Gemini 2.5 Flash generates a contextual response from a live Firestore product catalog. The system includes conversation state management (active → handoff → resolved), a Gemini error-retry sub-workflow, a post-sale thank-you trigger, and a React dashboard for the business owner to monitor conversations and manually resume the bot after handoff. Newer additions route complaints and video requests straight to the owner instead of attempting an AI reply, each firing an instant email alert so nothing falls through the cracks.

n8n, Gemini 2.5 Flash, ManyChat, Firebase Firestore, Cloudinary, React, DigitalOcean

Sub-workflows: Gemini Retry Handler (error retries with exponential backoff) · Thank You Trigger (post-sale message on resolution) · Conversation Status Automation (bot-active ↔ human-handoff transitions)

Same NZ-based import business

An automated research pipeline that runs competitor and market analysis for a product-import business. Pulls Google Trends data, competitor shopping listings, and market news via SerpAPI, then hands the combined signals to Gemini 2.5 Flash to write the actual analysis. The finished report is created as a Google Doc and filed straight into the business's Drive folder — no manual copy-paste, no manual filing. Runs on demand via webhook so the owner can pull fresh intelligence whenever they need it, rather than waiting on a fixed schedule.

n8n, SerpAPI, Gemini 2.5 Flash, Google Docs API, Google Drive API, Google OAuth2

Built for a food business owner

The business owner was manually reconstructing a month of sales data by hand — reading daily totals off the POS dashboard and retyping them into Excel, once a month, for every product across every day. This automation pulls sales data directly from the Loyverse POS API with paginated, crash-resilient requests, aggregates it by product and day (handling timezone conversion and month-boundary edge cases that naive approaches get wrong), and writes the results into the business's existing Excel report template — preserving all original formulas, formatting, and branding — before delivering the finished file to Google Drive fully unattended. Verified against the POS system's own official monthly export, it matched 100% of tracked products exactly, and in the process caught a systematic undercount in the manual process worth thousands of pesos in unrecorded sales.

n8n, Loyverse API, Firebase Firestore, Python (openpyxl), Google Drive API, Cron

Built for this site

Powers the Estimate, Book a Call, and Hire Me forms on this page. A single webhook receives the submission, validates and normalizes the payload, logs it as a lead record in Notion, then fires parallel Slack and email notifications — so new inquiries show up in real time instead of me polling an inbox.

n8n, Notion API, Slack API, Gmail API

Built as a portfolio demo

Targets a gap that kept coming up in job applications — clients wanting VAPI and voice agent experience. It deploys a real inbound phone number where callers speak to an AI voice agent named Alex (GPT-4.1 for reasoning, ElevenLabs for voice synthesis, Soniox for speech-to-text). Alex collects appointment details through natural conversation — service type, name, preferred date and time — then invokes a live n8n webhook that validates the booking, writes it to Firestore, and posts a Slack notification, all within 575ms. Alex then relays the actual confirmation back to the caller verbatim, proving the full tool round-trip works in a real phone call, not a simulated one.

VAPI, ElevenLabs, GPT-4.1, Soniox STT, n8n, Firebase Firestore, Slack

Call +1 (943) 202-1520 to try it live.

Built for my own job search

Manually scanning OnlineJobs.ph every day for relevant postings was slow, and most listings didn't match my actual stack. This n8n workflow automates the triage: an Apify scraper pulls fresh postings daily, each one is scored for fit against my candidate profile using Gemini in an AI-agent-style scoring pattern (with prompt-injection-resistant framing, since job postings are untrusted scraped content), qualifying matches get written into an Airtable pipeline tracker, and a Slack digest notifies me of anything worth a look. It runs unattended every day, triages roughly 30 postings per run, and only surfaces matches scoring 7 or higher — turning a daily manual scan into a two-minute Slack check.

n8n, Apify, Google Gemini API, Airtable, Slack API