Loh Tong Hong
Senior Fullstack Engineer
Explore my work, projects, and skills via my interactive portfolio — http://lohtonghong.com/?token=thudh
(link expires on 12 Apr 2026)
Professional Summary
Senior Fullstack Engineer with 9+ years of experience building web applications, animation tools, payment systems, and AI-powered products. Currently at LottieFiles leading key features from payment gateway migrations to animation editors. Proven track record across multiple companies from game studios to SaaS platforms, complemented by a growing expertise in AI engineering including LLM integration, RAG systems, and vector embeddings. Passionate about shipping great products with clean, scalable code.
Work Experience
Fullstack Engineer → Senior Fullstack Engineer· 4 yrs
Mar 2022 - Present- •Built the LottieFiles homepage and marketplace homepage from the ground up
- •Led Stripe payment migration — billing UI, entitlement system, and local Docker setup
- •Upgraded framework from Next.js 12→14, React 17→18, and Tailwind 2→3 across multiple apps
- •Architected unified workspace — consolidated workspace types, auth flows, and join policies
- •Built premium animation marketplace with A/B testing, pack search, and multi-asset support
- •Built nested folder system and rebuilt the file location picker with tree navigation
- •Shipped multi-animation .lottie support end-to-end — carousel UI, upload flow, and backend pipeline
- •Built advanced animation optimizer with customizable quality settings on relottie v2 pipeline
- •Led complete sidebar redesign with onboarding modules and vanilla-extract adoption
- •Shipped enterprise audit logging with CSV export and workspace-level event tracking
- •Built AI reverse image search — vectorized images and text into embeddings via AI, enabling similarity-based animation discovery across the platform
- •Championed AI-augmented development — authored team-wide AI coding skills, configured MCP servers, and wrote Cursor rules to maximize developer efficiency and code quality
Academy Web Developer → Frontend JavaScript Developer· 5 yrs 9 mos
Jun 2016 - Mar 2022- •Touched every corner of the infographic editor — the core of the entire product and where most of the user value lives
- •Revamped Piktostory dashboard — redesigned settings UI/UX for the video creation tool
- •Built payment system from scratch — payment interfaces and gateway integration
- •Developed font loading module — custom font family management for the design editor
- •Built rich text editor for the Piktochart infographic design canvas
- •Optimized data transfer layer — refined HTTP calls to fetch only necessary data with caching, stale data management, and request deduplication
- •Built onboarding feature — guided new users through product features with step-by-step visual walkthroughs and contextual tooltips
- •Wrote comprehensive test suites — unit tests and E2E tests across core features
- •Built internal Kudos platform — fullstack employee reward and recognition tool
Game Developer· 1 yr 1 mo
Apr 2015 - May 2016- •Prototyped core game mechanics — R&D on gameplay features and systems for AAA game titles
- •Built AI behavior systems — foundation for game entity behaviors and NPC decision-making
- •Integrated 3D assets into game environments using Unity and Unreal Engine 4
Freelance & Contract Work
Fullstack Web Developer (Part Time)· 6 yrs 2 mos
2020 - Present- •Rebuilt OMS v2 with major platform enhancements and modernized architecture
- •Built vehicle live tracking — real-time GPS tracking similar to ride-hailing apps
- •Integrated insurance provider APIs — Allianz, Berjaya Sompo, Mazda, and more
- •Pioneered digital towing management — one of the first fully digitised onsite towing systems in Malaysia
- •Provided long-term maintenance & support — ongoing bug fixes, feature enhancements, and infrastructure upkeep
Frontend JavaScript Developer (Part Time)· 8 mos
Feb 2018 - Oct 2018- •Pioneered IQI Atlas — built the first iteration of what became one of Malaysia's largest property agent platforms
- •Built frontend web app from scratch — fully responsive SPA for real estate agent management
- •Defined coding standards — established conventions, methodology standards, and best practices for the team
- •Set up Webpack build system — configuration, optimization, and ongoing maintenance
- •Automated deployment workflows — deploy scripts for production and staging environments
Fullstack Web Developer (Part Time)· 2 yrs 2 mos
2017 - Mar 2019- •Built OMS and OMS v2 from scratch — full onsite towing management system for roadside assistance operations
- •Implemented real-time data sync across the platform using Firebase
- •Shipped push notification system via Firebase Cloud Messaging for live operational updates
- •Architected serverless backend — scalable cloud-based architecture on GCP
- •Automated deployment pipeline — custom scripts for consistent and reliable releases
Technical Skills
Education
Bachelor's Degree in Interactive Software Technology
2013 - 2015
TAR University College
- •**Deepened expertise** in system design, databases, and interactive software architecture
Diploma in Computer Science
2012 - 2013
TAR University College
Secondary Education (SPM)
2007 - 2012
SMJK Chung Ling
Primary Education
2000 - 2006
SJK(C) Perempuan China
Languages
Awards & Achievements
Penang i4.0 Seed Fund Recipient (Awarded by Chief Minister of Penang)
2022InvestPenang
1st Place — LottieFiles Hackathon
2023LottieFiles
2nd Place — LottieFiles Hackathon
2022LottieFiles
2nd Runner Up — GameJam
2013TAR University College
Chairperson, Student Welfare Committee
2012TAR University College — Faculty of Science and Computing
Course Representative
2012 - 2015TAR University College
Soft Skill Certification
2013TAR University College




