Open to remote senior roles · HK / Canada timezone overlap
Michael Lim
Production systems for payments, POS, and the web. Passionate senior full stack engineer with 11+ years of experience creating scalable web and mobile applications. I love turning complex problems into simple, beautiful, and intuitive solutions.
Proof
Outcomes from platforms used by real operators and customers every day.
2,000+
Restaurants on CaPOS
Cloud POS, payments, and kitchen flow in live Canadian venues
11+
Years shipping
Web, mobile, payments, and Web3 systems across four countries
~30%
Performance gains
Measured lifts from code-splitting, caching, and query work
0
Setup-fee POS stack
Payments, printing queues, and offline-ready restaurant flows
Work
Selected platforms with deep-dive case studies — problem, architecture, and results.
Canada's cloud restaurant POS platform unifying front of house, kitchen display, online ordering, payments, inventory, and reporting. Built the Ionic Cordova POS app, Node/Express APIs with MongoDB, Moneris and Global Payments integrations, and a printing server for kitchen ticket queues.
A luxury villa/house booking order system in Croatia built with PHP/Laravel, featuring real-time updates via WebSockets, Airbnb integration for listings/reservations, and robust availability management.
A crypto application built with React and Next.js, using NestJS for the backend with Web3 integration and Wagmi for wallet connectivity.
A React Native template (Expo) tailored for building mobile apps, including a job posting platform similar to Freelancer/Upwork.
Method
A senior delivery loop focused on clarity, reliability, and measurable outcomes.
Map operators, edge cases, and failure modes before writing code.
Shape APIs, data models, and UX flows that stay maintainable under load.
Deliver in slices with observability, device integrations, and rollback paths.
Track latency, error rates, and business metrics — then iterate.
Path
From internship foundations to leading production POS and Web3 platforms.
2013
Internship foundations in C++, C#, PHP, and data tooling.
2015
Built Java/Spring and React/Angular/Vue products with AWS deployments.
2019
Financial apps, team mentorship, and ~30% performance improvements.
2020
Wallets, smart contracts, The Graph, and multi-chain frontends.
2022
VeChain checkout, shipping automation, and Node/React migrations.
2024
CaPOS app, payment devices, APIs, and kitchen printing reliability.
Roles
Detailed roles across POS, Web3, finance, and full-stack product teams.
Designed the POS product Ionic Cordova app
Integrated payments with Moneris and Global Payments devices
Developed backend using Node/Express and MongoDB
Designed Node.js APIs and integrated with Ionic frontends
Built a printing server to resolve printing command queue issues.
Integrated Web3.js and Ethers.js into Next.js and web applications
Developed a crypto e‑commerce storefront with VeChain USD‑locked checkout and automated shipping APIs
Designed Node.js APIs and integrated them with React frontends
Migrated legacy Python apps to modern Node.js/React stacks.
Integrated Web3.js and Ethers.js into React, Next.js and Vue.js web applications
Implemented multiple wallet support using RainbowKit and Wagmi
Developed smart contracts with Hardhat and integrated with OpenSea
Built The Graph backend for tracking events and storing statistics
Maintained and updated projects per business requirements.
Developed enterprise‑scale financial applications with React/TypeScript and Java Spring Boot
Created modular frontend component libraries with Material UI
Improved app performance by ~30% via code‑splitting, caching, and database query optimization
Led a team of 4 developers, conducting code reviews, mentorship, and sprint planning.
Designed backend with Java Spring Boot and Grails, integrated AWS S3 storage and built a security module
Implemented UI/UX with React, Angular, and Vue.js
Developed REST APIs with Python and integrated them into front‑end applications
Designed data structures and managed MongoDB
Continuously updated UI/UX and integrated APIs
Deployed to AWS Lightsail and maintained infrastructure
Worked in Agile teams
Developed hybrid mobile apps using React Native and Ionic Cordova.
Contributed to web and desktop application development in C++, C#, and PHP with gradual transition into full‑stack web work
Built internal tools for data processing and reporting using JavaScript and MySQL
Assisted in migration of legacy codebases to modern JavaScript frameworks.
Toolkit
Depth across frontend, backend, mobile, payments, and cloud delivery.
Foundation
Academic grounding in computer science and engineering fundamentals.
Bachelor's Degree of Computer Science
Bachelor's degree with focus on computer science and engineering fundamentals.
Credentials
Cloud and platform certifications backing production delivery work.
2023
Amazon Web Services
AWS-SAA-2023
2022
Google Cloud
GCP-PD-2022
2021
Cloud Native Computing Foundation
CKA-2021
Contact
Ready to talk about POS, payments, Web3, or full-stack product work? I usually reply within 24 hours.
Open to remote senior roles · HK / Canada timezone overlap
Location
Hong Kong