Senior Full Stack & Mobile Engineer with 7+ years of experience designing, building, and scaling production systems used by over 1 million users. I operate across the full engineering stack — architecting backend APIs and data models, owning cloud infrastructure and DevOps pipelines, shipping React Native mobile apps for iOS and Android, and delivering polished, scalable web frontends.
A rare engineer who brings genuine depth across all three layers: backend systems, mobile, and web — making distributed teams faster, products more resilient, and technical decisions more sound.
🚀 Led 7-person engineering teams · Shipped apps to App Store & Play Store · Built systems handling 1M+ concurrent users · Reduced infrastructure costs by 15% · Achieved 99.9% uptime
| 🏗️ System Architecture & Design | ⚙️ API Design & Backend Engineering | ☁️ Cloud Infrastructure (AWS) |
| 📱 React Native Mobile Engineering | 🍎 iOS & Android App Delivery | 🚀 App Store & Play Store Deployment |
| 🗄️ Database Design & Optimization | 🔁 CI/CD & DevOps | 🔐 Security & Auth Implementation |
| 🌐 Full Stack SaaS Development | ⚡ Performance Engineering | 👥 Technical Leadership & Mentoring |
Backend
Mobile
Frontend
Databases & Caching
Cloud & DevOps
🏢 Senior Full Stack & Mobile Engineer — Costo AI, USA (Remote) · Apr 2024 – Nov 2025
- 🏗️ Owned end-to-end architecture for a fintech SaaS platform — API design, PostgreSQL schema modeling, cloud infrastructure, and frontend delivery — scaling to 1M+ active users
- 📱 Engineered a cross-platform React Native mobile app (iOS & Android) with deep linking, push notifications (FCM/APNs), offline-first data sync, and biometric authentication
- 💰 Built Django REST Framework financial modules with strict validation and test coverage, cutting calculation errors by 25%
- ☁️ Architected AWS production infrastructure (EC2 auto-scaling, ALB, CloudFront, S3), reducing hosting costs by 15%
- 🗄️ Led backend data model refactoring that improved API throughput by 20% and eliminated concurrency bottlenecks
- ⚙️ Established engineering best practices (PR templates, CI gates, architecture reviews) that lifted team velocity by 18%
🏢 Principal Engineer & Engineering Manager — DazzleLabs (Remote) · Sep 2022 – Dec 2023
- 👥 Led and mentored a 7-engineer cross-functional team with 100% on-time sprint delivery
- 📱 Architected and shipped a React Native mobile app serving 1M+ users — navigation architecture, Redux Toolkit state management, real-time WebSocket sync, and push notifications
- ⚡ Designed a distributed Redis caching architecture enabling 3x traffic growth with zero additional infrastructure spend
- 🌐 Architected multi-environment AWS + Heroku infrastructure with blue-green deployments and automated rollback pipelines
- 🔗 Built the core RESTful API layer in Node.js + MongoDB — data contracts, auth flows, and API versioning adopted org-wide
- 🛒 Engineered e-commerce transaction flows (cart, inventory locking, payments, order lifecycle) increasing checkout speed by 22%
🏢 Full Stack & Mobile Engineer — PXN Phantom Network (Remote) · Mar 2019 – Jul 2022
- 📦 Delivered 30+ production features using Next.js, Django, and AWS — zero critical post-release incidents
- 📱 Designed and launched a React Native mobile app — full lifecycle from architecture and API integration to App Store & Play Store submission
- 🔄 Led full-stack migration from legacy PHP monolith to React + Django REST API, improving maintainability by 40%
- 📊 Next.js SSR/SSG strategies improved Core Web Vitals and contributed directly to a 10% revenue uplift
- 🎨 Built a real-time Three.js / WebGL 3D experience for a global campaign across 12 markets
🏢 Full Stack Developer — Node Audio Ltd · Jun 2018 – Dec 2018
- 🔍 Resolved critical MongoDB performance regressions — redesigned indexes and aggregation pipelines, reducing P95 query time by 35%
- ✅ Architected AWS CI/CD pipeline achieving and sustaining 99.9% uptime
- 🔐 Implemented JWT auth system with refresh token rotation and RBAC
- 📱 Built performant React interfaces resulting in 28% improvement in user engagement metrics
🏢 Full Stack Developer — Fleamint · Feb 2015 – Apr 2017
- 💳 Built payment processing system with idempotent retry logic and webhook handling, reducing transaction failures by 18%
- 🛒 Delivered scalable marketplace modules (catalog, cart, orders, seller dashboards) increasing checkout speed by 22%
- 🔧 Collaborated with product leadership to define MVP scope and phased engineering roadmap
| 👥 1M+ Users Served | ⚡ 30% Performance Gain | 📱 3 Mobile Apps Shipped |
|---|---|---|
| ☁️ 15% Cost Reduction | 🗄️ 35% Query Time Reduction | ✅ 99.9% Uptime |
| 👨💻 7 Engineers Led | 🎯 100% On-Time Delivery | 📦 30+ Production Features |
✦ Full-stack depth across backend, mobile, and web — I own systems end-to-end ✦ Mobile-native: shipped React Native apps to App Store & Play Store (not just tutorials) ✦ Proven at scale: solved real concurrency, caching & infrastructure problems in production ✦ Engineering leader: manage teams AND stay deeply technical simultaneously ✦ Remote-native: 5+ years async across US, Canada & European timezones 🎓 Bachelor of Science, Computer Science — National University of Singapore
