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SDRStephen James Del Rosario

Stephen James Del Rosario

Lead Mobile & Full-Stack Engineer · Founder, DEIO INC.

stephen@delrosario.dev sjamesdelrosario stephendelrosario.com deio.ph Philippines · Remote worldwide

Full-stack engineer shipping across mobile and web: native iOS and Android, React Native, and the backends and APIs behind them. Founded DEIO INC., led teams, and modernized legacy codebases.

8+years shipping
20+apps shipped
12+industries
2×5.0★ apps on the App Store

Experience

DEIO INC.FounderJun 2026 – Present
Founder · Philippines · deio.ph
  • Founded a software and design studio building web and mobile products end to end, from brand and UX to App Store and Google Play releases.
  • Lead a small team of engineers and designers; own architecture, client strategy and the hard technical calls.
OutsourcedInFreelanceDec 2025 – Jul 2026
Senior Full Stack Engineer · Australia · Remote
  • Built CalorieCart, a SwiftUI calorie tracker with its backend: AI nutritionist chat, food recommendations, Google Places nearby restaurants and FatSecret nutrition data. Now in beta testing.
Jollibee GroupContractNov 2025 – Jun 2026
Senior iOS Developer Consultant · United States · Remote
  • Consulted across the Jollibee and Smashburger ordering apps serving North American customers.
  • Led the Forter fraud prevention and FreedomPay payment integrations; shipped new UI flows and fixed long standing bugs.
Blue Water Capital ManagementFreelanceApr 2025 – Present
Lead Full Stack Mobile Engineer · Salt Lake City, Utah · Remote
  • Lead engineer on Fleetsmarts, a fleet management platform: redesigned the app from scratch in React Native.
  • Shipped map markers for truck stops, route creation, payment methods, user management, notifications, messaging and loads.
  • Improved the PHP web app and built new API endpoints; Node.js services and Google Maps; deployed to iOS and Android.
Globe Telecom Inc.Full TimeNov 2022 – Aug 2025
Expert Mobile App Developer · Taguig City, Philippines · Hybrid
  • Core mobile team on GlobeOne, Globe's telco superapp for load, payments and rewards.
  • Led development of Globe Benta, a React Native app for prepaid load and promo retailers.
  • Built AI features with Flowise: LLM powered chat and automation flows.

Experience

Member Retention SystemsFreelanceJun 2024 – Aug 2024
React Native Developer · Melbourne, Australia · Remote
  • Built the class booking apps First Class, In The Deep and The Swim Academy: schedules, bookings, memberships and payments.
Artep Media Development SRLFreelanceJul 2023 – Mar 2024
Lead Mobile Developer · Berlin, Germany · Remote
  • Built CityGuide, a tourist guide app, from scratch in SwiftUI; led mobile and set the code standards.
PGX GroupFreelanceJul 2022 – Sep 2022
Senior iOS Developer · Pasig City, Philippines · Remote
  • Globe vendor delivering new features and bug fixes, including seamless modem connectivity by injecting values into the modem admin's JavaScript.
Highly Succeed Inc.Full TimeNov 2021 – Oct 2022
Senior iOS Developer · Mandaluyong City, Philippines · Remote
  • Shipped client iOS apps across health, e-commerce and services; mentored junior developers through code review.
SwapooLabsFull TimeMay 2021 – Dec 2021
iOS Developer · Taguig City, Philippines
  • Built the Swapoo crypto wallet iOS app: the wallet, the KYC verification flow, UI improvements and dark mode.
Upup TechnologiesFreelanceDec 2020 – Aug 2021
iOS Developer · Ho Chi Minh City, Vietnam · Remote
  • Created Ogogo and theGcard Vendor, a rewards locator and its vendor companion app.
  • Built MoveOnPH, a ride hailing app, later discontinued when the company went bankrupt.
Xin QI TechnologiesFull TimeDec 2019 – May 2021
Senior iOS Developer · Pasay City, Philippines
  • Led feature work on lifestyle and social apps in Swift and Objective-C; integrated real time chat and media.
Yeojinet Outsourcing SolutionsContractSep 2019 – Dec 2019
iOS Developer · Pasay City, Philippines · On-site
  • Delivered pixel accurate UIKit screens and REST integrations for international clients.
UP NOAHContractFeb 2019 – Aug 2019
ICT Developer · Quezon City, Philippines
  • Designed the Project NOAH website and was part of the team that built it in React JS: the national disaster risk and hazard mapping platform.