Available for Engineering Roles•Manila (UTC+8)

Building resilient web & mobile architectures.

Hi, I'm John Felix Lim — a Senior Software Engineer with 9+ years shipping production frontend and mobile products — React, Next.js, and React Native — with TypeScript adoption, N-layered architectures, and team mentoring. Also experienced with backend services (Node.js, NestJS, Express.js, Firebase, Supabase, Laravel) and DevOps tooling (AWS, Docker, CI/CD).

React NativeTypeScriptReact.jsNext.jsSupabase

Store-Ready Releases

N-Layer Architecture

End-to-End TypeScript

Explore Featured Work

Connect:Launch CLI Console →

01 // CAREER_TRAJECTORY

Work experience & leadership.

From early React Native migrations to senior engineering — 5 roles across mobile and web, with backend and DevOps experience along the way.

Education & Foundation

Bachelor of Science in Information Technology

Polytechnic University of the Philippines · 2017

Continuous Lifelong Learner

Senior

Senior Lead React Native Developer

Box + Dice (AU)Remote / Metro Manila

Jan 2021 – Oct 2026

Role Context

Leading React Native modernization — version upgrades, N-layered architecture, TypeScript migration, and store releases for a production CRM platform.

Quantifiable Achievements & Key Deliverables

Led the migration of the React Native application from a legacy version to the latest release, improving maintainability, stability, and compatibility with modern tooling.

Designed and implemented an N-layered architecture for the app, establishing clear separation of concerns and improving scalability, maintainability, and testability.

Replaced deprecated third-party libraries with supported alternatives, reducing technical debt and improving long-term stability.

Migrated the codebase from JavaScript to TypeScript, improving type safety, code quality, and developer productivity.

Introduced and expanded unit test coverage to improve reliability and reduce regression risk.

Defined and enforced React Native coding standards and architectural best practices across the codebase.

Managed builds, releases, and deployments to the Apple App Store and Google Play Store, resolving customer- and QA-reported issues along the way.

Technologies Utilized

React NativeReactJSTypeScriptRubyJestReact Native Testing LibraryApp StorePlay Store

02 // ABOUT_ENGINEER

Engineering with purpose & precision.

Frontend and mobile specialist — also experienced with backend services and DevOps tooling.

a Senior Software Engineer with 9+ years shipping production frontend and mobile products — React, Next.js, and React Native — with TypeScript adoption, N-layered architectures, and team mentoring. Also experienced with backend services (Node.js, NestJS, Express.js, Firebase, Supabase, Laravel) and DevOps tooling (AWS, Docker, CI/CD).

My engineering philosophy revolves around simplicity, performance, and developer velocity. I design maintainable abstractions, drive TypeScript adoption, and keep releases stable through testing and clear architectural boundaries.

When I am not shipping product features, you will find me refining frontend standards, mentoring teams, and building open playbook resources for production-grade mobile and web engineering.

LOCATIONManila, Philippines

EXPERIENCE9+ Years Production

AVAILABILITYRemote / Open

YEARS

Years Experience

APPS

10+

Apps Shipped

PLATFORMS

Platforms (iOS & Android)

YEARS

Years at Box + Dice

Frontend & Mobile

Web + iOS + Android

React, Next.js, and React Native from architecture through production — including store releases, version upgrades, and library migrations.

Craft & Leadership

Mentorship

TypeScript migrations, N-layered architecture, mentoring, and coding standards that keep teams shipping reliably.

Experienced with Backend

APIs & Data

Hands-on work building and integrating Node.js (Express.js, NestJS), Firebase, Supabase, and Laravel APIs with JWT/OAuth, GraphQL, and REST for mobile and web clients.

Experienced with DevOps

CI/CD

Practical exposure to AWS, Docker, GitHub Actions, environment configuration, and store / PM2 deployments — supporting delivery, not leading infra.

03 // SKILLS_MATRIX

Technical proficiencies & mastery.

Battle-tested technologies used in production systems shipping to App Store, Play Store, and web.

React Native

Mobile

Production iOS and Android apps, migrations, store releases, and native module integration.

TypeScript

Frontend

Strict typing, large-scale migrations, and end-to-end type safety across mobile codebases.

React.js

Frontend

Component systems, hooks, performance optimization, and reusable UI patterns.

Next.js

Frontend

App Router, SSR, portfolio and playbook sites with modern web best practices.

Expo

Mobile

Managed builds, OTA updates, and cross-platform delivery workflows.

04 // FEATURED_WORKS

Selected projects & architectures.

Personal products and professional delivery work — case studies engineered for reliability, performance, and maintainability.

Work projects

Mobile & Cross-Platform

FEATURED

Box + Dice Mobile Platform

Enterprise real-estate CRM on React Native

Led React Native version migration, N-layered architecture, TypeScript adoption, and App Store / Play Store releases for a production CRM used by Australian real-estate teams.

iOS + AndroidPlatforms

5+ YearsTenure

N-LayerArchitecture

React NativeTypeScriptN-Layered ArchitectureJest+2

Deep Dive Case Study

Mobile & Cross-Platform

FEATURED

Metrobank Mobile App

Yondu Inc. — capability lead on a flagship banking React Native app

Frontend capability lead at Yondu for Metrobank's mobile app — reusable components, Gitflow workflows, code review practices, and React Native mentoring for the delivery team.

Capability LeadRole

MetrobankClient

Yondu Inc.Company

YonduReact NativeComponent LibraryGitflow+2

Deep Dive Case Study

Frontend Architecture

FEATURED

Yondu Client Platforms

React.js & React Native foundations across multiple client apps

At Yondu Inc., initiated web and mobile projects — Bus Information System, Project Dave, Makati Parking App, and AEM POD Portal — leading front-end architecture, coding standards, and production deployments.

4+ PlatformsApps

Web + MobileStack

2018 – 2019Tenure

YonduReact.jsReact NativeStyled Components+2

Deep Dive Case Study

Full Stack

FEATURED

Samsung Product Web Apps

React.js apps for a global engineering organization

Built and maintained React.js applications for Samsung — reusable components, international collaboration at HQ in Korea, and performance-focused refactors across multiple products.

5 New + 6 MaintainedApps

GlobalMarkets

Samsung KoreaHQ Collab

React.jsComponent SystemsPerformanceInternational Teams

Deep Dive Case Study

Personal projects

Mobile & Cross-Platform

PERSONALFEATURED

Pet Flex (Owner App)

Personal — Expo veterinary care platform for pet owners

Mobile owner app for pet health, reminders, nutrition, clinic booking, and records — Expo SDK 57, React Native, and TypeScript, built as a personal product with agent-assisted delivery.

Expo 57Stack

iOS + AndroidClients

PersonalType

ExpoReact NativeTypeScriptExpo Router+6

Deep Dive Case Study

More projects

05 // PLAYBOOK

The standards I hold teams to.

32 hand-written topics and a catalog of 300 curated agent skills. Every topic ships as a skill file you can copy into Claude, Cursor, or Copilot — not a one-off prompt.

Read the Playbook

06 // REFERENCES

Character references.

Contacts who can speak to my work and character.

Owen Moony

Technical Lead

Box + Dice (AU)
Australia

View on LinkedIn

Jose IV Santos

Senior React Consultant

SYSGEN RPO
Metro Manila, Philippines

View on LinkedIn

07 // GET_IN_TOUCH

Let's build something great.

Open to senior software engineering roles focused on frontend and mobile — with hands-on backend and DevOps experience.

Direct contact channels

Prefer email for opportunities. LinkedIn and GitHub for collaboration and open-source.

Response SLA

Typically replies within 1–2 business days for role and project inquiries.

Work Preference

Remote-first, UTC+8 based, open to global teams with flexible overlap.

Building resilient web & mobile architectures.

Work experience & leadership.

Senior Lead React Native Developer

Frontend Capability Lead (React Native)

Frontend Developer (ReactJS)

Frontend Developer (ReactJS & React Native)

Frontend Developer (React Native)

Bachelor of Science in Information Technology

Senior Lead React Native Developer

Role Context

Quantifiable Achievements & Key Deliverables

Technologies Utilized

Engineering with purpose & precision.

Frontend & Mobile

Craft & Leadership

Experienced with Backend

Experienced with DevOps

Technical proficiencies & mastery.

React Native

TypeScript

React.js

Next.js

Expo

Selected projects & architectures.

Work projects

Box + Dice Mobile Platform

Metrobank Mobile App

Yondu Client Platforms

Samsung Product Web Apps

Personal projects

Pet Flex (Owner App)

More projects

The standards I hold teams to.

Character references.

Owen Moony

Jose IV Santos

Let's build something great.

Direct contact channels

Work experience & leadership.

Senior Lead React Native Developer

Frontend Capability Lead (React Native)

Frontend Developer (ReactJS)

Frontend Developer (ReactJS & React Native)

Frontend Developer (React Native)

Bachelor of Science in Information Technology

Senior Lead React Native Developer

Role Context

Quantifiable Achievements & Key Deliverables

Technologies Utilized

Engineering with purpose & precision.

Frontend & Mobile

Craft & Leadership

Experienced with Backend

Experienced with DevOps

Technical proficiencies & mastery.

React Native

TypeScript

React.js

Next.js

Expo

Selected projects & architectures.

Work projects

Box + Dice Mobile Platform

Metrobank Mobile App

Yondu Client Platforms

Samsung Product Web Apps

Personal projects

Pet Flex (Owner App)

More projects

The standards I hold teams to.

Character references.

Owen Moony

Jose IV Santos

Let's build something great.

Direct contact channels