Brian Tjahjadi
- Full-stack Developer
- ML Engineer
- Robotics Software
Experience
- 01
oNex
Software Engineer
May 2025 - Dec 2025 ☆ Sydney, NSW
- Architected and implemented data pipeline for ingesting and preprocessing mobile time-series data on AWS and railway, supporting continuous online learning of downstream ML models.
- Built personalized content-based recommendation service with Python, embedding models, and vector databases for fast ANN vector search and tailored user recommendations, integrating with our backend using gRPC.
- Rewritten non-composited CSS animation background on landing page using WebGL2, delivering GPU-accelerated graphics and eliminating lag on low-spec devices.
- Collected user feedback and proposed landing page improvements to boost engagement; implemented features using Astro, TypeScript, TailwindCSS, and SolidJS via an island architecture.
- 02
Sydney Interplanetary Rover Initiative (SIRI)
Software Engineer
May 2024 - Dec 2025 ☆ Sydney, NSW
- Passed the Australian Rover Challenge (ARCh)’s critical design review stage at the first year of attending the competition, accepted into the upcoming system acceptance review.
- Led development of base station control panel for remote command and telemetry of our flagship rover using Foxglove, React, and ROS2.
- Implemented rover's autonomous AI in the form of a behavior tree using BehaviorTree.CPP and BehaviorTree.ROS in C++.
- Developed ROS2 C++ controllers for autonomous and manual rover steering (spin and 4-wheel convergent ackermann) alongside ESTOP and keep alive mechanisms for rover safety using Python and C++ ROS2 nodes.
- Upgraded simulation and deployment workflows to follow ROS2 best practices (upgrading to Python, xacro urdfs, docker).
- 03
- 04
Sydney Institute for Astronomy (SIfA)
Undergraduate Research Assistant
Mar 2024 - Jun 2024 ☆ Sydney, NSW
- Created automated data retrieval and crossmatching Python program using the Astroquery CASDA API to investigate viability of exoplanet detection by radio waves, found 2 candidate planetary systems satisfying criteria.
- 05
Sydney Institute for Astronomy (SIfA)
Undergraduate Research Assistant
Sep 2023 - Jan 2024 ☆ Sydney, NSW
- Analysed MEERKAT radio telescope time series data using pandas, numpy, and matplotlib to document changes from a particular fast radio burst (FRB) from 2019 to 2022, narrowing down theoretical models for the FRB's source.
- 06
Coles Group
Service and Trolleys Team Member
Mar 2023 - Sep 2023 ☆ Sydney, NSW