Available for hire
Full Stack & Mobile Developer

Jovelyn
Comaingking

Full Stack Developer · Social Media Manager · UI/UX Designer

I design and develop end-to-end applications from Flutter apps on Google Play to enterprise systems on .NET and Azure. I care about clean code, real user experience, and shipping things that last.

See my work → Get in touch Download CV ↓
8+
Years building apps
85+
Production APIs
2+
Years social media
6+
Projects shipped
Jovelyn Comaingking
Selected work

Projects I've built

wandr.
01
wandr.
DIY Philippine travel planner — AI itinerary, expense splitting, visa checker.
Flutter Firebase Claude AI
Dental Clinic System
02
Dental Clinic System
Patient records, appointments, billing — mobile & web.
Flutter ASP.NET SQL Server
Rent-a-Car Platform
03
Rent-a-Car Platform
Real-time booking, driver assignment, fleet management.
Flutter Web API .NET
Travel Website
04
Travel Website
Destination guides, tour packages, itinerary planning.
ASP.NET C# JavaScript
Kiosk / POS System
05
Kiosk / POS System
Self-service ordering, inventory, sales reporting.
.NET C# Oracle
CropCraft
06
Management System
Enterprise ops, employee records, Azure DevOps CI/CD.
Azure ASP.NET PostgreSQL
Live websites
Built with HTML, CSS & JavaScript · Hosted on GitHub Pages
Real Estate
Cebuana Broker
Broker & appraiser site for Metro Cebu — property listings, services, and free consultation booking.
Visit site ↗
Engineering
ALLIED-PROS Engineering
Mechanical, electrical, civil & automation services in Cebu — disciplines, projects, and quote requests.
Visit site ↗
Internet Provider
YS Fiber
Fiber internet provider site — plans, coverage, live network status, and online sign-up.
Visit site ↗
Beyond code

Social Media Management

Aside from development, I also manage social media accounts across TikTok, Facebook, and Instagram — handling content planning, copywriting, visual design, and community engagement for brands and projects.

TikTok

Viral short-form campaigns, trend-driven creativity, hook writing, and editing. Proven experience creating scroll-stopping content that drives organic reach and community growth.

Video editing Hook writing Trend research Caption copy
Facebook

Brand page management for clients including Timmerman Industries — post scheduling, community engagement, lead-generating ad strategies, and measurable growth campaigns.

Page management Post scheduling Community mgmt Ad campaigns
Instagram

Feed curation, Reels, Stories, and branded graphics that balance creativity with performance. Visual-first approach with cohesive brand identity across every post.

Feed curation Reels & Stories Hashtag strategy Brand aesthetics
Featured campaign
wandr. app launch

End-to-end launch content for my own travel app — concept, copywriting (English & Taglish), design, and video editing, sized natively for TikTok, Instagram, and Facebook.

5Promo videos
9Static posts
3Platforms
Video ads & Reels
Feed posts, stories & carousel
What I offer
✍️
Content Writing
Captions, hooks, CTAs, and copy tailored to each platform's tone and audience
📅
Content Planning
Monthly content calendars, posting schedules, and campaign planning
🎨
Visual Design
Branded graphics, post templates, and consistent visual identity across platforms
💬
Community Engagement
Comment replies, DMs, community building, and audience interaction
📊
Analytics & Reporting
Monthly performance reports — reach, engagement, follower growth, and insights
📢
Paid Ads
Facebook and Instagram ad setup, targeting, and budget management
Sample work
Design & Prototyping

UI / UX Design

🎨
Figma

UI design, component libraries, design systems, interactive prototypes, and developer handoff — from wireframe to pixel-perfect screens.

WireframingPrototypingDesign systemsComponents
🖌️
Adobe XD

High-fidelity mockups, user flow diagrams, and interactive prototypes. Used for client presentations and stakeholder reviews.

High-fidelity UIUser flowsMockupsPresentations
🧠
UX Research

User journey mapping, usability testing, information architecture, and translating user needs into clean, intuitive interfaces.

User journeysUsability testingIAAccessibility
Design process
01
Research
Understand users, goals, and pain points
→
02
Wireframe
Low-fidelity layouts and user flows
→
03
Design
High-fidelity UI with design system
→
04
Prototype
Interactive prototype for testing
→
05
Handoff
Dev-ready specs and assets
Sample work
Photography App — Story Screen
wandr. — DIY Travel App
Mobile UI · Dark Theme
Developer Portfolio — Contact
Dental Application — Contact
Web UI · Green Theme
Instagram Redesign — Feed
CropCraft Application
Mobile UI · Dark Theme
Developer Portfolio — Skills
Car Rental — Rent-A-Car
Web UI · Green Theme
Instagram Redesign — Profile
Instagram Redesign — Profile
Mobile UI · Dark Theme
Developer Portfolio — Resume
Developer Portfolio — Resume
Web UI · Figma Design
What I work with

Skills & Technologies

📱
Mobile
Flutter & Dart
Android
Google Play Billing
Firebase
⚙️
Backend
.NET / C#
ASP.NET
Web API / REST
Microservices
🗄️
Database
SQL Server
Oracle
PostgreSQL
Firebase / Firestore
☁️
Cloud & DevOps
Azure DevOps
CI/CD Pipelines
Firebase Hosting
Git
🤖
AI & APIs
Claude AI / Anthropic
Vision API
Google APIs
REST Integration
🎨
Frontend
HTML / CSS
JavaScript
Responsive Design
UI/UX
✏️
UI / UX Design
Figma
Adobe XD
Wireframing
Prototyping
📣
Social Media Marketing
Content Strategy & Calendars
Short-form Video (TikTok / Reels)
Copywriting & Captions
Meta Ads & Analytics
Where I've worked

Experience & Credentials

  1. Jun 2026 — Present Current
    Senior Software Engineer
    ROMTech · Remote (US company)
    • Own back-end development for core systems, focused on the SQL Server database layer.
    • Build CRM integrations and maintain the master Python integration service that connects the company's platforms.
  2. Jul 2023 — 2026
    Senior Software Engineer (Sr. App Development Analyst)
    Accenture · Cebu City
    • Delivered well-tested features for new and existing software across several technologies.
    • Helped establish Agile practices and a structured SDLC that shortened development cycles.
  3. Sep 2022 — Jun 2023
    Software Engineer
    Cebu Mitsumi (Japanese manufacturer) · Cebu City
    • Designed web APIs for production traceability, secured with OAuth.
    • Built shared code libraries and automation scripts that cut repetitive manual work.
  4. Jul 2019 — Sep 2022
    Software Developer
    RD Pawnshop Inc. · Cebu City
    • Built APIs for web, mobile, purchasing and e-wallet systems.
    • Set up CI/CD that took deployments from days to hours, plus monitoring and secure authentication.
  5. 2018 — Present
    Freelance Full-Stack & Mobile Developer
    Remote
    • Deliver web, mobile and API projects end to end, from Figma UI/UX to deployment.
The case for working with me

Why hire me?

I don't just build things — I build things that work, look great, and grow your business. Here's what sets me apart.

Let's work together →
🚀
8 Years of Real Experience
Not just theory — 8 years of building production-grade applications used by real people, across mobile, web, and enterprise platforms.
🎯
Full Stack + Creative
Rare combination of developer, UI/UX designer, and social media strategist. I handle everything from backend code to brand visuals.
📱
Published App on Play Store
wandr. is live on Google Play — a real product I built end-to-end, from design to billing integration and production deployment.
📊
Data-Driven Content
My social media work is backed by analytics — not guesswork. Campaigns are built to maximize reach, engagement, and conversion.
⚡
Fast, Reliable Delivery
5 years of freelancing taught me how to deliver on time, communicate clearly, and adapt quickly to client needs and feedback.
🇵🇭
Local Insight, Global Standard
Based in Cebu, Philippines — I understand local markets while delivering work that meets international quality standards.
Who I am

About me

I'm a Full Stack and Mobile Developer with hands-on experience building production-grade applications across mobile, web, and enterprise platforms. From Flutter apps live on Google Play to .NET systems running in enterprise environments — I build things end-to-end.

My approach is straightforward: understand the problem, choose the right tools, and build something that actually works for real users. I've shipped apps used by real people, integrated AI into mobile workflows, and managed deployments through Azure DevOps pipelines.

I'm comfortable across the full stack — from designing a Firestore schema to building a REST API, styling a responsive web interface, or publishing an app on the Play Store. I enjoy working on products that solve real problems.

Role
Senior Software Engineer · Full Stack · Mobile
Platforms
Android · Web · Desktop · Enterprise
Currently
Senior Software Engineer at ROMTech (remote) · wandr. live on Google Play
Location
Philippines 🇵🇭
Email
netdev98@gmail.com
Let's build
something great.

Open to freelance projects, collaborations, and full-time opportunities.

netdev98@gmail.com
Download my CV ↓
📍 Cebu, Philippines
📞 +639224244309
🌐 www.jovelyncomaingking.net
📱 @comaingkingjc