Chris Liang

A manager class designed to manage mock data. This class was necessary because the back-end infrastructure was not yet available, and it was required to make the application functional for a presentation.

To simulate the back-end functionality, the manager class loads PLIST files from an app bundle and utilizes them. It should be noted that this manager class is intended to be replaced by actual managers that communicate with the back end once it becomes available.

• Created rich animations using UIkit and Core Animation. • Developed an offline mode.
• Enabled geofencing using Core Location and Google Maps SDK.
• Implemented a payment integration using PayPal.

• Implemented a Shopify Client SDK and a Google Maps SDK.
• Added Apple WatchKit.
• Created a beacon using Estimote SDK.
• Added a payment integration using Apple Pay.
• Implemented a 3D touch feature.

• Built a location-based service using Core Location and Google Maps SDK.
• Created a push notification-based messaging service.
• Developed VoIP call using PJSIP library.
• Created UI and unit testing using XCTest.
• Developed an offline mode using Core Data.

• Provided the business logic needed for point of sales.
• Developed an offline mode using Core Data.
• Created a payment integration using Braintree.
• Enabled a credit card validation feature using Card.io.
• Implemented Apple Pay.
• Used WatchKit and OpenGL.

• Developed real-time messaging using QuickBlox.
• Implemented geofencing using Google Maps SDK and Core Location.
• Integrated an in-app payment using Stripe, ApplePay, and PayPal.
• Created UI animations using Core Animation.
• Developed an offline mode using CoreData and Realm.
• Implemented push notification using OneSignal.
• Developed unit testing and UI testing.

• Used Parse for the back end.
• Developed an offline mode using local storage.
• Helped to develop the business requirements.
• Developed push notifications using APNs.

• Updated the non-structured code base to MVC architecture
• Integrated HealthKit and GoogleFit for getting user details such as number of steps, weight, blood pressure, etc.
• Integrated Apple Pay and Google Pay for in app purchase feature
• Pixel perfect implementation of the new UI given by the client
• Used React.js(Redux-saga) for front end, Pure Javacript(ES5), and Node.js(ExpressJS) for backend
• Implemented Sketch design to pure HTML/CSS

The purpose of this project was to provide real-time coaching to clients via a mobile app helmed by actual coaches.

Role: Senior Full-stack Developer

I built both desktop web app and mobile app in React (Apollo GraphQL) and React Native.

This project used Apollo GraphQL with a serverless framework for the desktop app. It was already on air and I needed to write a lot of migration scripts and seeding every time, I wrote a new function or add a new feature based on Knex.

I also built a dashboard to manage the coaches' apps (CRUD operation) and clients' iOS & Android mobile apps. I also wrote customized webhooks for Twilio messaging between clients and coaches and cron jobs to send notifications to coaches based on the SMSs received from the clients.

I was able to fix several bugs and add more than five new features of the app in less than two months.

The CRM application tracks client contacts and relationships with project managers and helps plan client events and similar tasks around managing marketing activities for clients. The application has been in production for six years.

Updates included adding multiple new features, bug fixes, and reducing some technical debt. There was a detailed, prioritized backlog in Jira outlining all tasks.

In this role, I maintained and enhanced an internal CRM application built with Angular 7, NgRx, Node.js/Express, GraphQL, and MongoDB. I focused on bug fixes, performance optimizations, and new feature development, improving the user experience and application stability. My notable accomplishments include reducing load times by 25%, optimizing API performance by 40%, and resolving 50+ critical issues. I worked closely with a product manager to prioritize tasks, mentored junior developers, and streamlined integrations with third-party tools to improve client event management. My work helped improve both platform performance and overall team efficiency.