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Sherwen Mortis

Full Stack Software Developer | Web Developer | AI-Assisted Development

Building and maintaining full-stack applications, business systems, responsive web experiences, backend services, databases, integrations, and deployment-ready solutions.

Open to: Full Stack Developer Web / Frontend Developer Backend / API Developer .NET / C# Developer Software Developer Junior QA / Software Tester IT / Technical Support Freelance & Remote
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About Me

Turning real business requirements into reliable and maintainable software

Sherwen Mortis - Full-Stack Developer

Full Stack Software Developer | Web Developer | AI-Assisted Development

I'm an Information Technology graduate and full-stack software developer focused on building and maintaining practical web applications, business systems, backend services, databases, and integrations. My experience spans POS solutions, inventory workflows, relational databases, REST APIs, real-time functionality, and modern frontend interfaces.

I design, build, and deploy full-stack software solutions tailored to real-world business and operational requirements—from retail cashier terminals and inventory ledger systems to municipal management platforms. I leverage an AI-assisted development workflow for efficient analysis, implementation, and refactoring while ensuring all code is thoroughly tested, validated, and production-ready.

  • Location: Pagadian City, Philippines
  • Phone: +63 963 131 0910
  • Email: mortis.sherwen@gmail.com
  • Education: BS Information Technology (Completed)
  • Freelance: Available for Hire
  • Focus: Full-Stack Systems, APIs & Databases
Let's Work Together
1 +

Year of Experience

3 +

Production Systems

5

Certifications

20 +

Technologies Used

Technical Skills

Core technologies, frameworks, databases, and development workflows

Frontend

Responsive web design, reusable UI components, and modern web interfaces

React JavaScript TypeScript HTML5 CSS Tailwind CSS Responsive Web Design

Backend & APIs

Robust server logic, RESTful services, WebSockets, and authentication

Node.js Express.js C# .NET PHP REST APIs API Integration WebSockets Authentication

Data & Database

Relational schema design, normalization, queries, and database integration

SQL MySQL PostgreSQL Supabase Database Integration

Tools & Workflow

Version control, QA and testing, systematic debugging, and deployment preparation

Git GitHub Debugging Manual Testing Test Cases Bug Reporting API Testing Regression Testing User Acceptance Testing Deployment Preparation System Maintenance

AI-Assisted Development

AI-assisted code analysis, implementation, debugging, refactoring, investigation, and review with manual validation of generated changes.

Antigravity ChatGPT OpenAI Codex Manus

Platforms & Additional Technologies

Deployment platforms, cross-platform development, and additional technologies used across projects.

Cloudflare Pages Cloudflare Workers GitHub Pages Vercel Render Flutter Dart Firebase MS Access

What I Do

Software and web engineering services for businesses, clients, and teams

Web Application Development

Building responsive, fast, and secure web applications using React, TypeScript, Vite, and modern CSS frameworks.

Mobile App Development

Creating cross-platform mobile applications with Flutter and Dart, connecting directly to cloud APIs and offline storage.

REST APIs & Real-Time Backends

Engineering server-side REST APIs, WebSockets for instant live data sync, and JWT-secured authentication flows using Node.js, C#, .NET, and PHP.

Database Design & Optimization

Architecting normalized relational schemas with MySQL and PostgreSQL, writing optimized queries and ensuring data integrity.

POS & Inventory Management

Delivering custom point-of-sale solutions with barcode integration, inventory tracking, sales reporting, and receipt export.

UI/UX & Visual Design

Designing user-centric layouts, wireframes, and branding assets with Figma to translate client requirements into clean software.

How I Build

From requirements to maintenance, with testing built into every stage

01

Requirements

Understand the real workflow with clients and staff, then define scope, roles, and expected outcomes.

02

Design

Plan the database schema, API structure, and interface layouts before writing production code.

03

Build

Develop frontend, backend, and database features in small increments, tracked with Git.

04

Testing & Quality Assurance

Every feature is verified before release, not only at the end of the project.

  • Functional testing: walk through real workflows such as checkout, stock updates, and reports.
  • API testing: verify endpoints, responses, authentication, and error handling.
  • Edge cases & validation: invalid input, duplicates, empty states, and permission checks.
  • Regression checks: re-test existing features after each change.
  • Cross-device checks: confirm responsive behavior on desktop, tablet, and mobile.
  • User acceptance: validate with real users in the actual environment.

Bugs are logged, fixed, and re-tested before the next stage.

05

Deployment

Release to Cloudflare Pages/Workers, Vercel, Render, or GitHub Pages, followed by a smoke test on the live site.

06

Maintenance

Fix issues, apply improvements, and update features based on user feedback after launch.

Experience & Credentials

Full Stack Software Developer | Web Developer | AI-Assisted Development

Building and maintaining full-stack applications, business systems, responsive web experiences, backend services, databases, integrations, and deployment-ready solutions.

Professional Experience

Independent Full Stack Software Developer

Jul 2026 – Present

Independent Projects

Design, develop, maintain, and improve full-stack software and web applications for business and operational use across frontend interfaces, backend APIs, databases, authentication, testing, deployment preparation, and system maintenance.

  • Build and maintain full-stack web and software applications.
  • Develop responsive frontend interfaces and reusable UI components.
  • Build and integrate backend APIs and database-driven workflows.
  • Implement authentication, validation, real-time functionality, and business logic.
  • Develop inventory, sales, barcode, receipt, customer credit/ledger, dashboard, and reporting workflows.
  • Perform debugging, testing, refactoring, maintenance, and deployment preparation.
  • Use AI-assisted development tools for codebase analysis, implementation, debugging, review, and refinement while manually validating changes against project requirements.
React TypeScript JavaScript C# .NET PHP Node.js Express.js MySQL PostgreSQL Supabase REST APIs WebSockets Tailwind CSS Git

Software Developer / Programmer

Jun 2025 – May 2026

CENRO (Community Environment & Natural Resources Office)

Developed and maintained web and mobile applications supporting the digitalization of environmental management and public-service operations.

  • Worked on frontend and backend application features.
  • Integrated databases and APIs.
  • Developed and maintained user-facing functionality.
  • Debugged application and workflow issues.
  • Supported system maintenance and improvements.
  • Improved existing operational and administrative workflows.
  • Helped develop digital tools used for environmental and public-service operations.
React JavaScript Flutter Dart Node.js Express.js SQL PostgreSQL REST APIs Git

IT Support Intern / Junior IT Support Specialist

Feb 2026 – May 2026

EMCOR

Provided first-level technical support for hardware, software, network, workstation, and user-related issues during a four-month OJT.

  • Computer/workstation setup
  • Hardware troubleshooting
  • Software installation
  • System maintenance
  • Basic network/connectivity troubleshooting
  • User technical support
  • Diagnosis of workstation issues
Hardware Troubleshooting Workstation Setup Network Diagnostics User Technical Support

Education

Bachelor of Science in Information Technology

Completed

Josefina H. Cerilles State College

Core coursework: Software Engineering, Database Systems, Web & Mobile Development, Data Structures & Algorithms, Network Administration.

Certifications

Introduction to SQL

2025

Sololearn

Relational database querying, aggregation, filtering, table joins, and database design principles.

Python Developer

2025

Sololearn

Core Python programming, data structures, functional paradigms, OOP, and modular code development.

Introduction to Android Studio: A Hands-On Project for Game Logic

2025

JHCSC

Component lifecycles, event listeners, state handling, UI rendering, and interactive Android logic.

User Experience Design: Discovering Thinking Framework

2025

JHCSC

Frameworks for user research, design thinking, information architecture, wireframing, and interface usability.

Pixel Perfect: A Beginner's Journey to Graphic Design

2025

JHCSC

Visual hierarchy, color harmony, typography, layout balance, and professional asset preparation.

Additional Strengths

Problem Solving Adaptability Teamwork Time Management Willingness to Learn Technical Support

Languages

English Filipino

Selected Core Projects

Production and business systems aligned with current full-stack development activities

View Project Showcase
Independent Full Stack Project
ISRA Hardware POS System

Browser-based POS and inventory system for hardware-store operations with sales workflows, barcode and receipt handling, customer credit/ledger features, approval workflows, and real-time notifications.

React TypeScript Node.js Express.js MySQL REST APIs WebSockets Tailwind CSS Git
Full Stack Web Application
Bantay Kolekta / Waste Collection Management System

Management system supporting waste-collection and environmental operations through authentication, dashboards, reports, database-driven workflows, schedules, routes, and operational monitoring.

React JavaScript / TypeScript Node.js Express.js SQL / PostgreSQL REST APIs Git / GitHub
Full Stack Web Platform
Business Website
ISRA Hardware Trading Website

Responsive hardware-store website with reusable UI components, product browsing and inquiry functionality, and cloud/database integration.

React TypeScript Tailwind CSS Supabase Git / GitHub
Live Website

Featured Projects

Selected full-stack applications and production projects

Flagship Project Production

ISRA Hardware POS System

Browser-based POS and inventory system for hardware-store operations with sales workflows, barcode and receipt handling, customer credit/ledger features, approval workflows, and real-time notifications.

React TypeScript Node.js Express MySQL WebSockets JWT
  • Keyboard-first cashier checkout workflow
  • Real-time inventory & stock ledger
  • Hardware barcode scanner integration
  • Customer credit / Utang tracking
View Screenshots (4 Screens)
Station TERM-01 — POS Cashier Terminal
Online
Hardware Store POS Cashier Terminal Interface
Click to enlarge screenshot (1 of 4)
Screenshots: Cashier Terminal Executive Dashboard Inventory Terminal External Processing
Full-Stack Business Website Live Website

Isra Hardware Trading Website

Responsive full-stack business website with interactive customer quotation chat, catalog browsing, search, and store information.

React TypeScript Cloudflare Workers Supabase Tailwind CSS Vite PostgreSQL
  • Modern storefront & categorized inventory catalog
  • Interactive customer chat assistant for quotes & stock inquiry
  • Admin customer helpdesk & quotation desk with stock verification
  • Embedded Google Maps store locator & counter pickup
Live Website View Screenshots (3 Screens)
store.israhardware.workers.dev
Live
Isra Hardware Trading Storefront Landing Page
Click to enlarge screenshot (1 of 3)
Screenshots: Landing Page Customer Chat Box Admin Helpdesk
Web & Mobile Live Platform

CENRO Waste Tracker System

Municipal solid waste tracking, collection route visibility, and public citizen reporting system developed for CENRO.

React.js Flutter Dart PostgreSQL Firebase REST APIs Vercel Render
  • Triple-role portal (Admin, Driver, Citizen)
  • Interactive collection route dispatch mapping
  • Mobile collection driver app (Flutter / Dart)
  • Citizen reporting for missed collections & waste hotspots
Live Website View Screenshots (4 Screens) Flutter App
cenrotracker.vercel.app
Live
CENRO Waste Tracker Admin Terminal Dashboard
Click to enlarge screenshot (1 of 4)
Screenshots: Admin Terminal Route Mapping Driver Map Citizen Map
Desktop Software Completed

Karenderya Inventory & Billing System

Native desktop billing and inventory tracking system built to eliminate order errors and ingredient waste in local canteen operations.

C# .NET MS Access SQL Desktop App
  • Counter billing with instant change calculation
  • Automatic raw stock ingredient deduction
  • Menu, recipes, and category CRUD management
  • End-of-day sales auditing & revenue reports
View Screenshots (3 Screens) Client Deployed
Karenderya POS.exe — Local Client Terminal
Native Desktop
Karenderya Inventory and Billing System Desktop Interface
Click to enlarge screenshot (1 of 3)
Screenshots: Billing Terminal Stock Ledger Menu & Reports

Certificates & Credentials

Official certifications, specialized technical workshops, and professional development seminars.

4 Verified Credentials JHCSC School of Computing Studies Hands-On Technical Workshops
Certificate of Participation - User Experience Design: Discovering Design Thinking Framework
View Certificate
UI/UX & Design Thinking November 15–16, 2025

User Experience Design: Discovering Design Thinking Framework

In-depth seminar exploring user-centered design methodologies, customer journey mapping, empathy-driven ideation, interactive prototyping, and usability validation.

JHCSC Pagadian — Campus Library
Speaker: Mark Lester P. Catungal, MIT
Design Thinking User Experience Wireframing Usability Testing
Certificate of Participation - Pixel Perfect: A Beginner’s Journey to Graphic Design
View Certificate
Graphic & Visual Design October 25–26, 2025

Pixel Perfect: A Beginner’s Journey to Graphic Design

Foundational workshop focused on visual hierarchy, color psychology, modern typography principles, digital layout composition, and branding materials.

JHCSC Pagadian — IT Building Conference Room
Speaker: Christian Frix J. Dechavez
Visual Hierarchy Typography Brand Identity Digital Composition

Get in Touch

Have a software project, business system, website, mobile app, or promotional media project in mind? I'm available for freelance work, collaborations, and full-time opportunities.

Location

Pagadian City, Philippines

Phone / WhatsApp

+63 963 131 0910