HARRY NGUYEN
I turn vision into motion
Frontend Engineer / Full-Stack Engineer with 7+ years building high-performance web apps, real-time map experiences, gamification platforms, ERP/CRM dashboards, and campaign systems. I turn complex product ideas into polished, data-connected interfaces and launch-ready workflows, using AI-assisted engineering across implementation, testing, and automation.
FutureTech
Jan 2021 — Present- —Developed and implemented internal and public-facing websites, CRM systems, dashboards, and interactive web applications from product and design requirements.
- —Translated business requirements into technical specs, release estimates, and production-ready features across frontend and backend boundaries.
- —Led frontend development for #HuntTheMouse, a large-scale O2O cash hunt in Singapore reaching ~1M users, across real-time map gameplay, live coin interactions, campaign operations, user flows, and dynamic content.
- —Designed and implemented reusable gamification system architecture covering game logic, user management, map layers, power-ups, and dynamic content across multi-brand campaigns.
- —Delivered branded web games and campaign experiences for DBS PayLah! (#HuntYourZodiac), Science Centre Singapore (#UNTAME), POSB (Smiley Town), Kris+ (#CouponMania), DBS (UltimateHawker), Magnum Pleasure Auction, and many other branded campaigns.
- —Built the #HuntTheMouse System, an internal operations platform that enabled teams to configure campaigns, control live gameplay, draw circular zones to place coin drops, manage merchants and prizes, adjust game pricing, publish notifications, and support players.
- —Extended frontend products into full-stack features by connecting user-facing experiences with APIs, server-side validation, automation, and AI-assisted delivery.
- —Maintained and optimized existing codebases, improving map rendering, live interactions, performance, scalability, and reusable patterns for high-traffic launches; also authored reusable MapLibre and frontend routing packages.
- —Collaborated closely with QA to investigate and resolve bugs, production issues, and change requests, verifying fixes before release.
GCE
Apr 2019 — Dec 2020- —Developed high-volume sports products handling thousands of concurrent users with real-time data updates using VueJS and NuxtJS.
- —Built data visualization dashboards and analytics interfaces using ChartJS, establishing reusable component systems across projects.
- —Implemented responsive, accessible UI components and optimized performance for complex data-heavy interfaces.
- —Maintained and refactored legacy codebases, collaborated with teams to integrate APIs, and troubleshot production issues.
Freelance
2019 — Present- —KK ERP - Keystone Corp: Built frontend workflows for a multi-company ERP spanning sales inquiries, orders, purchasing, warehouse and 3PL fulfilment, dispatch, credit, invoicing, settlement, customer and vendor records, stocktake, and driver operations using VueJS, Vuetify, TanStack Query, Pinia, and ChartJS.
- —HeyNaNa - Lotte Data Communication: Built Admin and Seller portals for a pet-care platform covering seller onboarding, service setup and approval, bookings, pet-care diaries, payments, settlements, reviews, and community moderation using React, NextJS, Mantine, Nx Monorepo, and Zustand.
- —Lotte Delivery - Lotte Mart Vietnam: Built the frontend control surface for omnichannel fulfilment, covering order splitting, pick-and-pack, substitution, driver and 3PL assignment, returns and refunds, COD, reconciliation, settlement, and store capacity using VueJS, Vuetify, TanStack Query, Pinia, and ChartJS.
- —Extended frontend products into full-stack features with NodeJS, Express, MongoDB, PostgreSQL, API integrations, and AI-assisted implementation.
HUTECH University
2015 — 2019Languages
- Vietnamese (native)
- English (intermediate)
Certifications
- Certificate of English Proficiency - General English Test, Intermediate Level (CEF B1)
Things I've built
#HuntTheMouse
Sqkii +Singapore's largest online-to-offline cash hunt — a location-based game where players hunt virtual coins across the real world in real time, chasing a golden-coin grand prize through a hint-driven treasure hunt. I led frontend development, from GPS map gameplay and live coin spawns to standout power-ups — metal detector, coin sonar, beacons, and rarity-tiered hints — plus merchant integrations and multi-brand campaigns, built on two open-source packages I authored.
#HuntTheMouse System
Sqkii +Operations platform for running #HuntTheMouse campaigns end to end: live game controls, coin and hint configuration, dynamic pricing, in-game communications, merchant onboarding, prize inventory, branded-coin approvals, and support tooling.
KK ERP
Keystone Corp +Multi-company ERP connecting business sites, customers, vendors, sales and purchasing, warehouse and 3PL operations, and financial controls in one role-aware platform.
HeyNaNa
Lotte Data Communication +Pet-care operations platform connecting administrators and service providers across seller onboarding, service setup, bookings, care diaries, payments, settlements, and community moderation.
Lotte DMS
Lotte Mart Vietnam +Omnichannel fulfilment platform orchestrating orders, pick-and-pack operations, internal and 3PL delivery, returns, payments, and store capacity across Lotte Mart Vietnam.
#HuntYourZodiac
DBS PayLah! +Two-season, island-wide Chinese New Year hunt turning DBS PayLah! transactions into game power-ups as players tracked 60 zodiac variants, won cash Angbaos, and raced in zodiac clans.
#UNTAME
Science Centre Singapore +Three-season hybrid STEM adventure blending virtual worlds, mini-games, video quizzes, and real-world missions with onsite experiences at Science Centre Singapore.
#Smiley Town
POSB +An open-ended financial literacy world where children explore, learn through games and stories, complete milestones, earn Smiley Acorns, and customise their character.
#UltimateHawker
DBS PayLah! +A nationwide celebration of Singapore hawker culture spanning community nominations, regional voting, and a location-based cooking game connected to real DBS PayLah! transactions.
#CouponMania
Kris+ +An idle merge game for Kris+ where automatically collected coupon pieces grew into higher-value deals, gift boxes, and nearly 50,000 digital and physical prizes.
#Magnum Experiences
Magnum +Two seasons of connected brand play: a real-time prize auction in 2022 and a classic-game remix arcade in 2023, both turning product purchases and digital engagement into rewards.
#Eevee Adventure Mission
Pokémon × Sentosa +An island-wide Pokémon adventure that turned Sentosa exploration into a 12-mission QR trail, combining character encounters, quizzes, verified spending, and onsite prize redemption.