Zairus Opinion builds things that actually run.
2nd-year CS student at BatStateU who builds AI-assisted software — full-stack apps wired with Claude and Gemini, plus agentic n8n workflows that automate the work businesses still do by hand. Open to freelance development and automation builds.
Web & App Development
Full-stack apps, dashboards, and internal tools.
AI Integration
Wiring Claude, Gemini, and OpenAI into real products.
Workflow Automation
n8n systems replacing manual business processes.
API & Systems Integration
Connecting tools, data, and services together.
Project Estimator
Get a rough cost range — configure your project below and the estimate updates live.
Estimated Range
—
Configure options to see your estimate.
Rough estimate only — not a final quote. Student commission work may be priced differently from business or automation builds. Final pricing confirmed after an initial call.
Inquiry sent!
Book a Call
Pick a time that works, fill in your details, and I'll confirm by email. This is a request — not an instant booking.
Availability (PH time · GMT+8)
Request sent! I'll confirm by email.
What to expect
A 20–30 min call to discuss your project, timeline, and requirements. I'll send a confirmation email once I've checked availability.
Times are in Philippine Standard Time (GMT+8). I can propose an equivalent in your timezone if needed.
Selected shipped projects
React · Python · Firebase · n8n
TechWize — Digital Literacy & Cybersecurity Site
Multi-page educational site covering cyber threats, digital safety, and online practices. Not deployed yet — GitHub only for now.
HTML, CSS
Nailong — Period Tracker App
GitHub link coming soonBuilt for a client who needed a personal health tracking tool. Cycle and symptom logging, predictions, and history view.
Expo, React Native
Telemetry Companion App
In ProgressiRacing 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
More client work coming — check back as projects wrap up.
DM Lead-Response Automation
Built for an NZ-based import business. Gemini 2.5 Flash generates contextual responses to Instagram and Facebook DMs, routed through ManyChat Dynamic Content blocks, with a Firestore product catalog as the backend.
n8n, Gemini API, ManyChat, Firestore
Market Intelligence Reporting
Same anonymous client. Automated competitor and market research pipeline — SerpAPI queries assembled and formatted into a Google Docs report via n8n on a recurring schedule.
n8n, SerpAPI, Google Docs API
More automation case studies will be added as builds are completed.
Testimonials
Testimonials are on their way — coming as client projects wrap up.
Education
Batangas State University
BS Computer Science · 2025–Present · Dean's Lister
Laguna College
Senior High School, STEM · 2024–2025 · Top 20 of Grade 12
Rizal Standard Academy
Junior High School · 2022–2023 · With High Honors
Skills
Languages
JavaScript, Python, C++, HTML, CSS
Frameworks
React, Vite, Tailwind CSS
Libraries
Zustand, Recharts, Framer Motion, Capacitor
Databases
Firebase Firestore, Supabase, SQLite
APIs & Services
Finnhub, Gemini, Anthropic, Stripe, Resend, Upstash
AI Tools
Claude, Claude Code, Gemini, Cursor
Tools
Git, GitHub, VS Code, n8n, Vercel, Cloudflare, Firebase Hosting
Concepts
REST APIs, Serverless, PWA, RLS, OOP, Webhook Automation, OAuth2, Agentic Workflows
Open to part-time remote roles.
Available for freelance work — full-stack apps, AI-integrated products, and automation systems that replace manual busywork.