Research Interests
Education
Bachelor of Advanced Computing (R&D) (Honours)
Jul 2022 to Jul 2026Australian National University
Machine Learning Specialisation
- Completed an honours thesis on room envelope 3D reconstruction using 3D foundation models (VGGT).
- Recipient of the Chancellor's International Scholarship.
- Former President, Formula Motorsports Club.
- Former Research Portfolio Officer, Undergraduate Research Society.
Research
LayoutLens: Room Envelope Reconstruction with VGGT
Arjun Raj, Dylan Campbell
Honours thesis on predicting the amodal room envelope, the walls, floor, and ceiling hidden behind furniture and clutter, as dense per-pixel geometry. Adapts the VGGT 3D foundation model with a learned layout-depth head, roughly halving reconstruction error versus the base model and outperforming classical plane, Manhattan, and cuboid fitting.
Fine-Tuning of BioCLIP 2.5 with Taxonomic Heads for Multi-Species Plant Identification
Arjun Raj, Manindra de Mel, Razeen Wasif, William Brake
ANU's 7th-place submission to the PlantCLEF 2026 multi-species plant identification challenge.
TrackNetV4: Enhancing Fast Sports Object Tracking with Motion Attention Maps
Arjun Raj, Lei Wang, Tom Gedeon
A motion-attention approach for fast, accurate sports object tracking.
Advancing Video Anomaly Detection: A Concise Review and a New Dataset
Liyun Zhu, Lei Wang, Arjun Raj, Tom Gedeon, Chen Chen
A concise review of video anomaly detection accompanied by a new benchmark dataset.
Comparing Computer Resource Usage Through Interpolating Global Ecosystem Dynamics Investigation (GEDI) LiDAR Waveform Data
Arjun Raj, Andrew Charles Baker
Comparing compute resource usage across methods for interpolating GEDI LiDAR waveform data.
Experience
Data Scientist
Nov 2024 to PresentNatureHelm
Building and operating production geospatial ETL pipelines in Python on AWS (Batch, Lambda, Step Functions) with a PostGIS data store and Docker, processing large-scale satellite and biodiversity datasets. I develop spatial-analysis modules with the geospatial Python stack (GeoPandas, Shapely, rasterio/GDAL, scikit-image) for land-cover change and landscape-connectivity analyses, integrate public data sources such as GBIF, GRIIS, and Google Earth Engine Dynamic World, and harden the pipeline with automated data-quality checks (Soda Core) and tests. I also contribute to the backend API and web portal (TypeScript, NestJS, React), including interactive map visualisations.
Data Scientist Intern
Jul 2024 to Oct 2024NatureHelm
Integrated biodiversity scoring, vegetation analytics, and interactive ecological visualisations into the NatureHelm platform. Built scalable ELT pipelines, integrated AWS services (S3, Lambda, EC2), and designed RESTful APIs, alongside large-scale performance optimisations, documentation, and cross-functional testing.
Projects
Context-First Prompting for LLM Unit-Test Generation
A five-stage, context-first pipeline that generates JUnit tests with GPT-4o-mini using structured program-analysis context (Jimple IR, predicate strings, branch summaries) and a feedback-driven compile-and-repair loop. Evaluated on Defects4J, reaching around 94% branch and line coverage and exposing all targeted faults. University research project at ANU.
Local AI Health Assistant
RAG-powered health assistant with SolidPod storage and multi-platform querying, exposed through a Flutter application and CLI.
AI-Powered Surgery Scheduler
Predicts surgical case length to optimise operating-list planning and throughput by skill level. Top-5 finalist at AI Hack Melbourne 2023.
Maze of Enchantment
A Java-based desktop maze game featuring strategic, puzzle-driven challenges.
Quirkus Educational App
Android application designed for students, staff, and educational institutions to communicate, interact, and learn more efficiently.
Certifications
- Microsoft Certified: Power Platform Fundamentals · MicrosoftApr 2025
- TensorFlow Developer · GoogleJun 2021
- Oracle Certified Associate, Java SE 8 Programmer · OracleJan 2021
- Certified Associate in Python Programming (PCAP) · Python InstituteDec 2020