Jennifer Cerio

Professional Summary

Full Stack Developer building production-ready web applications, POS systems, booking platforms, dashboards, and operational tools using React, Next.js, TypeScript, PostgreSQL, MongoDB, Supabase, and related technologies.

Brings 12+ years of business operations and client coordination experience, with a strong understanding of real-world workflows, users, documentation, and operational requirements.

Technical Skills

• Frontend: React, Next.js, React Native, TypeScript, JavaScript, Tailwind CSS, Radix UI, Responsive UI, Accessibility
• Backend & APIs: Node.js, Next.js Route Handlers, REST APIs, Serverless Functions, Domain Services
• Databases & Data: PostgreSQL, MongoDB, Mongoose, Supabase, Firebase, Firestore, SQL, IndexedDB
• Authentication & Security: NextAuth.js, Google OAuth, Supabase Auth, RBAC, Row Level Security, bcrypt, Security Headers
• Cloud & Services: Vercel, Firebase, Supabase Storage, Cloudinary, Resend, Google APIs
• Engineering: Git, GitHub, GitHub Actions, CI/CD, Jest, Zod, Linting, Production Deployments
• Specialized: PWA, Offline Sync, Realtime Systems, Web Bluetooth, ESC/POS Printing, Web Push, PDF Generation, Meta Conversions API

Professional Experience

• Freelance Full Stack Developer

  2023 – Present

  • Design and build production web applications including booking systems, POS platforms, dashboards, mobile applications, and business automation tools.
  • Develop full-stack features across frontend interfaces, APIs, authentication, databases, realtime workflows, and deployment.
  • Translate business workflows into system requirements, user flows, roles, permissions, data structures, and application logic.
  • Build responsive interfaces and operational tools using React, Next.js, TypeScript, Supabase, PostgreSQL, MongoDB, Firebase, and related technologies.
  • Implement offline workflows, authentication, realtime updates, reporting, integrations, and production deployments.

• Business Operations Specialist

  2018 – 2025

  Cosmos International Placement Agency Inc.

  • Managed day-to-day operational workflows, documentation, client coordination, and recruitment processing.
  • Coordinated records, requirements, and internal processes across multiple stakeholders.
  • Supported internal systems and workflow improvements.
  • Maintained operational accuracy across client, applicant, and documentation processes.

• Liaison Officer

  2012 – 2017

  Kougen International Promotions

  • Coordinated client requirements, documentation, and operational workflows.
  • Managed document processing and communication between internal teams and external stakeholders.
  • Supported day-to-day administrative and operational requirements.

Selected Projects

• Glammed Nails By Jhen · www.glammednailsbyjhen.com

  Full Stack Booking & Business Management Platform

  Designed and developed a production booking and business-management platform that centralizes scheduling, customers, payments, staff, finance, analytics, and communication.

  Next.js 16, TypeScript, React, MongoDB Atlas, Mongoose, NextAuth.js, Tailwind CSS, Vercel

• Spudtan POS · spudtan.vercel.app

  Progressive Web POS & Operations System

  Built an installable POS system connecting checkout, kitchen operations, inventory, sales, expenses, thermal printing, offline order capture, and synchronization.

  React 19, TypeScript, Vite 8, Supabase, PostgreSQL, Zustand, PWA

• TalaTalk

  Mobile School Communication Platform

  Mapúa Malayan Digital College capstone group project designed to centralize announcements, events, and classroom updates for teachers, parents, and school staff.

  React Native, React, Firebase, Expo

• Additional Web Projects

  Built responsive business websites, ecommerce experiences, dashboards, and lead-generation websites using React, Next.js, Firebase, and Tailwind CSS.

  Critter Craft Co. · LVS Marketing · Labransa Demolition · Business Dashboards & Websites

Education

Bachelor of Science in Information Technology

Major in Software Development

Mapúa Malayan Digital College · 2022 – 2026