Difan Chen

Responsibilities

• Built advanced backend features, designed solutions and systems using modern tools and cloud platforms.
• Developed key platform features from mobile end to backend systems.
• Set up automated pipelines and processes for app delivery.
• Production issue monitoring, analyzing, and supporting
• Coaching engineers

Projects

• Authentication System: Created a secure passwordless login system for web, admin, and mobile platforms using Auth0.
• Mobile app(Android) : Built a flexible Android app using modern design patterns and frameworks like MVI, and Jetpack Compose. Delivered key features like monthly statements and notifications, ensuring smooth integration across mobile and backend systems.
• Backend: Built and developed features in micro-services like bff-service, notification-service, identity-service using Kotlin/SpringBoot, Typescript/Node.js with AWS services.

Skills

• Backend: Kotlin, Spring Boot, Typescript, NodeJS, Docker, AWS.
• Mobile: Kotlin, MVI Architecture, Jetpack Compose, Coroutine/Flow.
• Front-End: React, NextJS.
• Authentication: Auth0, Passwordless Login.
• DevOps: CI/CD pipeline

Responsibilities

• Led efforts to break down a monolithic Android app into a modular system with infrastructure and feature modules.
• Upgraded the app architecture for better performance and maintainability.
• Improved deployment efficiency by building and optimizing CI/CD pipelines.
• Setup app release process and coordinate release process between multi product teams
• Compose guidelines and practices for mobile engineers across product teams

Projects

• Android Modularization: Transformed a monolithic application into a modular structure with separate infrastructure and feature modules.
• Architecture Migration: Migrated the app to a modern architecture, incorporating Compose, Coroutine, RxJava, and MVI for improved performance and scalability.

Skills

• Android Development: Modularization, Jetpack Compose, Coroutine, RxJava, MVI.
• DevOps: CI/CD Pipelines
• System Design: Modular and Scalable App Architecture.

Responsibilities:

• Feature implementation and optimization.
• App Stability monitoring and Delivery Management
• Architecture Improvement and Refactoring
• Coaching engineers

Projects:

• Zip Android App: Designed and developed key features of the app. Ensured feature delivery with quality, stability, and accuracy.
• Zip Android SDK: Enabled merchants' app to provide a better payment experience with ZipPay.
• Zip App Design System: Streamlined user interface development by creating a centralised UI library for Zip global rebranding.

Skills:

• Android Development: Modularization, Anko, Coroutine, RxJava, MVVM.
• DevOps: CI/CD Pipelines

Responsibilities

• Designed and implemented scalable RESTful APIs to enhance back-end functionality and ensure data security.
• Developed Android applications using MVVM architecture, Kotlin, and tools like Anko to deliver high-performance and user-friendly experiences.
• BAU and Customer tech support

Projects

• Pocketbook Bank Syncing Service: Developed logic for syncing bank transaction and account information from different banks.
• Pocketbook Android App: Developed Android applications using MVVM architecture, Kotlin, and tools like Anko to deliver high-performance and user-friendly experiences.
• Open Banking: Integrated Open Banking APIs to make transactions syncing more smoothly and speedup.
• Pocketbook website: Developed new features and maintained existing functionality.
• Credit Check Report: Pump credit check data into a pre-defined html template with modern design to generate reports for customers. In addition, built and provided credit check API for external usage.

Skills

• Backend: Java, Spring Boot, Web Scraping, Selenium, Typescript/Javascript, NodeJS, AWS.
• Mobile: Kotlin, MVVM Architecture, RxJava, Anko, Jetpack Components.
• Front-End: Angular, Html, Javascript, CSS.
• Authentication: OAuth.
• DevOps: CI/CD pipeline.