Bryan Tan — Penultimate @ NUS Industrial and Systems Engineering

GITHUB

Open Source Projects I'm involved in

Public repos I am actively building, maintaining, or extending.

Paperdesk

Open Source

Featured

Offline-first desktop PDF workspace for macOS and Windows.

2026 — Present • Open source

github.com/bryanneedsgit/PaperdeskOpen repo

Summary

Paperdesk is an offline-first desktop PDF workspace built with Tauri 2, React, TypeScript, PDF.js, and pdf-lib. It keeps files on-device while providing page-level workflows for merging, arranging, annotating, formatting, form filling, and export.

Key Highlights

Opens and merges local PDFs into one editable workspace without uploading or syncing files.
Supports page selection, deletion, drag-and-drop reordering, rotation, and undo/redo.
Exports headers, footers, watermarks, form edits, and text, highlight, shape, pen, and signature annotations into a new PDF.

license

MIT

targets

macOS + Windows

core stack

Tauri + PDF.js

Under the hood

PDF.js powers local rendering and thumbnails, while pdf-lib handles page-level output operations and final export.
Source PDF bytes stay unchanged; workspace edits are represented as page-level metadata until export.
The Tauri 2 desktop shell targets macOS and Windows with platform-specific bundle configuration and local autosave metadata recovery.

Skills Practiced

Tauri 2ReactTypeScriptPDF.jspdf-libOffline FirstOpen Source

Paintbox

Open Source

Featured

Open-source layer-based raster image editor for macOS.

2026 — Present • Open source

github.com/bryanneedsgit/paintboxOpen repo

Summary

Paintbox is a lightweight, layer-based raster image editor for macOS built with Tauri 2, React, TypeScript, and HTML Canvas. I am working on it as a practical exploration of precise canvas tooling, desktop app packaging, and the editor systems behind selections, layers, history, adjustments, and effects.

Key Highlights

Built around a single mutable editor store exposed to React through useSyncExternalStore.
Covers pixel-editing workflows across selections, brush, pencil, eraser, fill, gradient, text, shapes, pan, and zoom.
Includes layer operations, clipboard workflows, undo/redo, image transforms, adjustments, effects, and self-test coverage for the editor engine.

license

MIT

target

macOS

core stack

Tauri + Canvas

Under the hood

The renderer keeps document-resolution layers on offscreen canvases, with the visible canvas compositing layers, checkerboards, overlays, and interaction feedback.
Selection work spans rectangle, ellipse, lasso, magic wand tolerance, mask combination, outline tracing, and selection-clipped edits.
The architecture separates editor state, selection math, pixel operations, transforms, and canvas interaction so features can be added without turning the UI into the source of truth.

Skills Practiced

Tauri 2ReactTypeScriptHTML CanvasRustImage EditingOpen Source

Paperdesk

Open Source

Featured

Offline-first desktop PDF workspace for macOS and Windows.

2026 — Present • Open source

github.com/bryanneedsgit/PaperdeskOpen repo

Summary

Key Highlights

Opens and merges local PDFs into one editable workspace without uploading or syncing files.
Supports page selection, deletion, drag-and-drop reordering, rotation, and undo/redo.
Exports headers, footers, watermarks, form edits, and text, highlight, shape, pen, and signature annotations into a new PDF.

license

MIT

targets

macOS + Windows

core stack

Tauri + PDF.js

Under the hood

PDF.js powers local rendering and thumbnails, while pdf-lib handles page-level output operations and final export.
Source PDF bytes stay unchanged; workspace edits are represented as page-level metadata until export.
The Tauri 2 desktop shell targets macOS and Windows with platform-specific bundle configuration and local autosave metadata recovery.

Skills Practiced

Tauri 2ReactTypeScriptPDF.jspdf-libOffline FirstOpen Source

Paintbox

Open Source

Featured

Open-source layer-based raster image editor for macOS.

2026 — Present • Open source

github.com/bryanneedsgit/paintboxOpen repo

Summary

Key Highlights

Built around a single mutable editor store exposed to React through useSyncExternalStore.
Covers pixel-editing workflows across selections, brush, pencil, eraser, fill, gradient, text, shapes, pan, and zoom.
Includes layer operations, clipboard workflows, undo/redo, image transforms, adjustments, effects, and self-test coverage for the editor engine.

license

MIT

target

macOS

core stack

Tauri + Canvas

Under the hood

The renderer keeps document-resolution layers on offscreen canvases, with the visible canvas compositing layers, checkerboards, overlays, and interaction feedback.
Selection work spans rectangle, ellipse, lasso, magic wand tolerance, mask combination, outline tracing, and selection-clipped edits.
The architecture separates editor state, selection math, pixel operations, transforms, and canvas interaction so features can be added without turning the UI into the source of truth.

Skills Practiced

Tauri 2ReactTypeScriptHTML CanvasRustImage EditingOpen Source

PROJECTS

Other stuff I have worked on 🤓☝️

Here are some of the projects and hackathons I have been involved in so far.

Hack for Good 2025

Web-based voucher system + online store + task system.

Jan 2025

Summary

Created the web-based Muhammadiyah Welfare Hub (voucher system + online store + task system) and supported website UI and materials; selected as a finalist among 350+ participants.

Key Highlights

Built the Muhammadiyah Welfare Hub for Muhammadiyah Welfare Home's residents and staff.
Aided development with 2 teammates (data population w/ Postman, website UI, README.md).
Developed using Clerk, MongoDB, Vercel and Springboot; deployed on Vercel.

finalist among

350+ participants

Skills Practiced

ClerkMongoDBVercelSpringbootPostman

Hydrogen Production and Transportation Within the US

Cost optimization with environmental regulatory standards.

Mar 2024 — Apr 2024

Summary

Optimised hydrogen production methods (SMR, Carbon Capture) for cost while meeting environmental regulatory standards, and evaluated transportation options in the US.

Key Highlights

Minimised transportation costs across US options (pipelines and trucking) using Transportation Simplex Method.
Produced overall analysis and improvement outlook across production and transportation methods, including future policy and long-run cost considerations.

Skills Practiced

SMRCarbon CaptureLinear ProgrammingSimplex MethodTransportation Simplex Method

Sacred Ecologies and Natural Resource Politics

Discussion of natural resource politics through TEK.

Mar 2024 — Apr 2024

Summary

Conducted extensive research and presented on Traditional Ecological Knowledge (TEK).

Key Highlights

Discussed current issues with natural resource politics.
Considered 3 points of view relating to TEK, including indigenous knowledge adaptation, TEK’s role in climate policies, and implications for modern resource policy approaches.

Skills Practiced

Traditional/indigenous Ecological Knowledge (TEK)Natural Resource Politics

Feasibility Analysis on the Future of Energy in Singapore

Financial and environmental feasibility analysis for energy strategy.

Feb 2024 — Apr 2024

Summary

Analysed both financial and non-financial factors to conclude on the most financially and environmentally feasible energy production strategy for Singapore in the long run.

Key Highlights

Concluded on the most financially and environmentally feasible energy production strategy for Singapore in the long run.
Financial analysis: cash flow analysis, probabilistic risk analysis, and @Risk diagrams (Tornado, Spider).
Non-financial analysis: Life-Cycle Analysis (LCA) and Analytical Hierarchy Process (AHP).

Skills Practiced

Cash Flow AnalysisRisk Analysis@RiskTornadoSpiderLife-Cycle Analysis (LCA)Analytical Hierarchy Process (AHP)

Project Management in the Aerospace Industry

Automated baggage carts project planning for Changi Airport.

Feb 2024 — Apr 2024

Summary

Produced a project management plan for the implementation of automated baggage carts within Changi Airport using common project management tools and risk strategy.

Key Highlights

Utilised project management tools such as Gantt charts, procurement planning, HR structuring, and project risk strategy.
Did a final presentation on the end-to-end implementation of our initiative.

Skills Practiced

Gantt ChartProcurement PlanningHR StructuringProject Risk Strategy

Statistical Report on Diabetes in Singapore

Classifier modelling with data cleaning and model comparison.

Oct 2023 — Nov 2023

Summary

Built a diabetes classifier using various models after demonstrating data cleaning; concluded with a model achieving 93% accuracy.

Key Highlights

Identified the classifier model most accurate for predicting diabetes based on lifestyle factors.
Demonstrated data cleaning and implemented models (KNN, Naive Bayes, logistic regression, decision trees).

model accuracy

93%

Skills Practiced

Data CleaningData AnalysisKNNNaive BayesLogistic RegressionDecision Trees

Ride Hailing Decision Tool

Excel/VBA price prediction to compare ride-hailing options.

Sep 2023 — Nov 2023

Summary

Designed and implemented an Excel/VBA-based ride hailing price prediction tool using regression modelling and R analysis.

Key Highlights

Compared ride-hailing options using a regression model based on ride type and distance.
Performed analysis on R, including p-value analysis.

validated accuracy

75%

Skills Practiced

ExcelVBARegression ModelRP-value Analysis

Hack for Good 2025

Web-based voucher system + online store + task system.

Jan 2025

Summary

Created the web-based Muhammadiyah Welfare Hub (voucher system + online store + task system) and supported website UI and materials; selected as a finalist among 350+ participants.

Key Highlights

Built the Muhammadiyah Welfare Hub for Muhammadiyah Welfare Home's residents and staff.
Aided development with 2 teammates (data population w/ Postman, website UI, README.md).
Developed using Clerk, MongoDB, Vercel and Springboot; deployed on Vercel.

finalist among

350+ participants

Skills Practiced

ClerkMongoDBVercelSpringbootPostman

Sacred Ecologies and Natural Resource Politics

Discussion of natural resource politics through TEK.

Mar 2024 — Apr 2024

Summary

Conducted extensive research and presented on Traditional Ecological Knowledge (TEK).

Key Highlights

Discussed current issues with natural resource politics.
Considered 3 points of view relating to TEK, including indigenous knowledge adaptation, TEK’s role in climate policies, and implications for modern resource policy approaches.

Skills Practiced

Traditional/indigenous Ecological Knowledge (TEK)Natural Resource Politics

Project Management in the Aerospace Industry

Automated baggage carts project planning for Changi Airport.

Feb 2024 — Apr 2024

Summary

Produced a project management plan for the implementation of automated baggage carts within Changi Airport using common project management tools and risk strategy.

Key Highlights

Utilised project management tools such as Gantt charts, procurement planning, HR structuring, and project risk strategy.
Did a final presentation on the end-to-end implementation of our initiative.

Skills Practiced

Gantt ChartProcurement PlanningHR StructuringProject Risk Strategy

Ride Hailing Decision Tool

Excel/VBA price prediction to compare ride-hailing options.

Sep 2023 — Nov 2023

Summary

Designed and implemented an Excel/VBA-based ride hailing price prediction tool using regression modelling and R analysis.

Key Highlights

Compared ride-hailing options using a regression model based on ride type and distance.
Performed analysis on R, including p-value analysis.

validated accuracy

75%

Skills Practiced

ExcelVBARegression ModelRP-value Analysis

Hydrogen Production and Transportation Within the US

Cost optimization with environmental regulatory standards.

Mar 2024 — Apr 2024

Summary

Optimised hydrogen production methods (SMR, Carbon Capture) for cost while meeting environmental regulatory standards, and evaluated transportation options in the US.

Key Highlights

Minimised transportation costs across US options (pipelines and trucking) using Transportation Simplex Method.
Produced overall analysis and improvement outlook across production and transportation methods, including future policy and long-run cost considerations.

Skills Practiced

SMRCarbon CaptureLinear ProgrammingSimplex MethodTransportation Simplex Method

Feasibility Analysis on the Future of Energy in Singapore

Financial and environmental feasibility analysis for energy strategy.

Feb 2024 — Apr 2024

Summary

Analysed both financial and non-financial factors to conclude on the most financially and environmentally feasible energy production strategy for Singapore in the long run.

Key Highlights

Concluded on the most financially and environmentally feasible energy production strategy for Singapore in the long run.
Financial analysis: cash flow analysis, probabilistic risk analysis, and @Risk diagrams (Tornado, Spider).
Non-financial analysis: Life-Cycle Analysis (LCA) and Analytical Hierarchy Process (AHP).

Skills Practiced

Cash Flow AnalysisRisk Analysis@RiskTornadoSpiderLife-Cycle Analysis (LCA)Analytical Hierarchy Process (AHP)

Statistical Report on Diabetes in Singapore

Classifier modelling with data cleaning and model comparison.

Oct 2023 — Nov 2023

Summary

Built a diabetes classifier using various models after demonstrating data cleaning; concluded with a model achieving 93% accuracy.

Key Highlights

Identified the classifier model most accurate for predicting diabetes based on lifestyle factors.
Demonstrated data cleaning and implemented models (KNN, Naive Bayes, logistic regression, decision trees).

model accuracy

93%

Skills Practiced

Data CleaningData AnalysisKNNNaive BayesLogistic RegressionDecision Trees

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send as many as you want!

(im really lonely)

Open Source Projects I'm involved in

Other stuff I have worked on 🤓☝️

Let's connect 🤝

Fun fact about Bryan