Callistus Tan - Software Engineer at Google

Callistus Tan

Software Engineer at Google

Sydney, New South Wales, Australia

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Summary

👤

Senior

🎓

Top School

Callistus Tan is a Software Engineer based in Sydney with a decade of experience building full-stack web and mobile applications, currently at Google. He holds a High Distinction Bachelor of Software Engineering from Monash and brings strong React/React Native, Node.js, GraphQL and MongoDB skills alongside data-analysis expertise in SQL, Python and Tableau. A competitive problem solver and multi-hackathon winner, he pairs algorithmic rigor with practical product delivery—examples include a UI enhancement contribution to GoogleChromeLabs' text-app and a reusable CRUD superclass that dramatically sped endpoint development at Monash. At Origin Energy he combined ETL, reporting and automation to streamline stakeholder reporting and supported an AWS cloud migration, demonstrating impact beyond his official remit. Comfortable across frontend, backend and data pipelines, he’s actively expanding into AI/ML while maintaining a hands-on approach to code, collaboration and usability.

10 years of coding experience

1 year of employment as a software developer

Bachelor of Software Engineering, Computer Software Engineering, High Distinction, Bachelor of Software Engineering, Computer Software Engineering, High Distinction at Monash University

English, Chinese

Github Skills (5)

html10

css10

javascript10

user-interface10

chromeos9

Programming languages (3)

JavaC++JavaScript

Github contributions (5)

GoogleChromeLabs/text-app

Nov 2022 - Jan 2023

A text editor for ChromeOS and Chrome

Role in this project:

Front-end Developer

Contributions:1 review, 7 commits, 3 PRs in 2 months

Contributions summary:Callistus primarily focused on enhancing the user interface and functionality of the text editor application. They added a Help section with a Shortcuts button, linking to a ChromeOS support article. Additionally, the user modified hotkey behavior by incorporating shift key detection for case-sensitive actions. The user addressed comments from a PR reviewer, indicating a collaborative development approach. Furthermore, the user made modifications to the CSS files to adjust appearance of the UI elements.

javascriptchromeoschromeeditortext-editor

callistusystan/Algorithms-and-Data-Structures

Dec 2017 - Mar 2019

Contributions:82 commits, 67 pushes, 1 branch in 1 year 3 months

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