*Worked mainly for Starrific Trading Pty Ltd (www.babycastle.com.au) as a self-employed freelancer on a personal contract.*Developed a CRM system for managing quotes, fulfillments and orders with Shopify and Auspost integrations using Python and Django. Deployed on Google Cloud Platform Compute Engine instances.*Developed an accounting system using Python, Beancount and Fava. * with Shopify front end design and changes using Liquid. *Setup CI/CD pipelines for deployment of the above systems.*Assisted with DNS Records maintenance and NGINX setup.

*Medical appointment mobile application development.*Backend development using PHP-Laravel and MySQL.*Exposure to cloud computing with AWS EC2, S3 and Lambda for hosting, storage and handling financial transactions.*Developed and maintained APIs and integrations with other systems and back-office infrastructure.*Adopted Agile methodologies facilitated with Jira.

*Designed, built and shipped an IOS mobile game - AndroidCore (IOS: https://apps.apple.com/my/app/androidcore/id6449585300) *Designed, built and shipped a multiplayer game - https://chenglin- fan.itch.io/ice-breaker*Used Unity game engine, Photon Networking Framework and developed in C#.*Conceptualized and designed game mechanics leveraging on tools like Photoshop for artwork and Blender for 3D modelling.*Prototyped various other game ideas encompassing a diverse range of genres such as deck-building, puzzles, casual and action RPGs.

*Food Delivery PaaS (Google Play: https://play.google.com/store /apps/details?id=com.qookashop&hl=en_AU)*Used php-laravel and MySQL for backend development; React-Native, Redux and Firebase for the front end.*As the earliest developer to join the team, designed and built foundation work ground-up by myself and provided onboarding assistance and guidance to new development team members.*Worked closely with stakeholders including project managers, designers and business analysts to convert designs and business requirements to functional requirements.*Designed and implemented CI/CD pipelines to facilitate development work.

*Australia based slot machines gaming software company.*Utilized a tech stack including PHP, Laravel for backend development, JavaScript, React, Redux, jQuery, HTML for frontend development, and MySQL for database management.*Integrated third-party slot games and payment systems into the company's IT infrastructure.*Provided business services to sub-agents, involving game services and financial transactions within the slot machine industry.*Developed website templates for sub-agents and offered personalized front-end website design services.*Built a robust back-office infrastructure enabling managers at different authority levels to oversee various business operations.*Developed reporting systems for generating daily and monthly reports for business analysis.