System map / select a node
Backend Lab / Core
Leong Xin-Nan
Backend engineer building reliable, high-impact systems.
- policies in month one
- 50K+
- alert-handling efficiency
- 50%
- GXBank hackathon
- #1
Education
Multimedia University, B.Sc. Computer Science (Software Engineering), First Class Honours, CGPA 3.71.
- Golang
- Java
- Python
- FastAPI
- Docker
- AWS
- PostgreSQL
Case File / Financial Systems
Reliable systems under real financial constraints.
Fund compliance rules, high-frequency operations, insurance launch, and reconciliation demand dependable backend systems.
- policies purchased in month one
- 50K+
- improvement in alert-handling efficiency
- 50%
Contribution
Fund-check rules, millisecond-level tools, insurance groundwork, and enhanced reconciliation.
- Rule input
- High-frequency validation
- Decision and reconciliation
- Java
- financial systems
- compliance
- reconciliation
Case File / Independent Project
PaperPilot
Upload PDFs, ask questions, and receive streamed answers grounded in the documents.
Identity
GitHub OAuth through Supabase.
Ownership
End-to-end backend ownership from document ingestion and retrieval through streamed responses.
- PDF upload
- Chunk and embed
- Vector + BM25 retrieval
- Stream grounded answer
- FastAPI
- React
- Supabase
- pgvector
- Voyage AI
- DeepSeek
- SSE
Case File / Internal Tooling
Overseer
A centralized portal for on-call engineers and QA testers.
- GXBank internal hackathon
- #1
- Incident context
- Datadog logs + database queries + Jira tickets
- Unified investigation view
- Datadog
- databases
- Jira
- internal tooling
Case File / Research
Assistive object detection
Assistive object detection and distance estimation on Raspberry Pi 4B+ using Pi Camera and HC-SR04P.
- danger zone
- 90cm
- IEEE publication
- First author
- Camera + distance sensor
- TensorFlow Lite inference
- Audio + vibration warning
- Python
- TensorFlow Lite
- Raspberry Pi
Career / Trace
Career trace
Roles in reverse chronological order.
Aug 2025 — Present
Fund Risk Java Developer
Ant International · Kuala Lumpur
Design and implement fund check rules for compliance. Build millisecond-level performance tools for high-frequency financial operations. Improved team alert-handling efficiency by 50% through an enhanced reconciliation system.
May 2024 — Aug 2025
Backend Engineer
GXBank Berhad · Petaling Jaya
Laid groundwork and launched an insurance product achieving 50k+ policy purchases in its first month. Won first prize in the internal hackathon with 'Overseer', a centralised troubleshooting portal.
Dec 2023 — Apr 2024
Software Engineer
Silverlake Symmetry and Technology Research · Petaling Jaya
Built a sophisticated chatbot for financial applications using open-source platforms. Collaborated with the team to deliver a cutting-edge product for a financial institution.
May 2022 — Aug 2022
Software Engineering Intern
Infront Consulting · Petaling Jaya
Contributed to software development with Django, Python, JavaScript, and Vue.js. Worked within Agile teams, supporting code quality through testing and best practices.
Side Quest / Field Notes
Field Notes
A visual gallery from outside the terminal.
OPEN FULL GALLERY →Side Quest / Minimax Arena
Minimax Arena
Play Tic-Tac-Toe against the browser.
Opponent
Your marker
- X wins
- 0
- Draws
- 0
- O wins
- 0