60+
engineers supported
Led GenAI workflow enablement for engineers and directors across a regional Visa organization.
Senior Software Engineer - Singapore
Senior software engineer building low-latency payment systems and AI-powered engineering tools.
I work on Visa's global clearing and settlement systems, with recent focus on agentic AI workflows, incident intelligence, and developer productivity.
25k TPS
API throughput
Improved socket and Go-based service throughput from 5k to 25k transactions per second.
500us
production processing time
Optimized high-throughput C++ payment components, with local test paths reaching roughly 200us.
$20M+
annual product revenue
Supported business-critical payment validation software contributing more than $20M annually.
Experience
Engineering for systems where correctness, speed, and reliability matter.
Recent work spans low-latency C++ payment components, API throughput optimization, and AI workflows for engineering teams.
Jan 2025 - Present
Senior Software Engineer
Visa
Appointed as one of two GenAI practitioners for a regional clearing and settlement engineering organization, while continuing to build high-performance payment systems.
- Conducted workshops on LLM tooling and agentic AI workflows for roughly 60 engineers and directors.
- Designed reentrant C++ components for fee and interchange calculation modules that support global settlement and revenue computation.
- Optimized production transaction processing to roughly 500 microseconds, with local test paths reaching roughly 200 microseconds against an initial 3 millisecond target.
- Architected socket and Go-based APIs that improved throughput from roughly 5,000 to 25,000 transactions per second.
- Designed an internal AI system with tool-calling, an LLM backend, and an Angular chat interface to support natural-language access to transaction-clearing API documentation.
- C++
- Go
- Python
- Boost
- Sockets
- Angular
- LLMs
Jun 2022 - Dec 2024
Software Engineer
Visa
Built and maintained payment software components supporting client validation workflows before transaction submission to VisaNet.
- Developed C++ components and Python scripts for a client-facing transaction validation product.
- Supported a product contributing more than 20M USD in annual revenue.
- Worked in business-critical payment domains where correctness, reliability, and maintainability are core engineering constraints.
- C++
- Python
- Payments
May - Aug 2021
Software Engineer Intern
Visa
Worked on a REST API and web application stack for transaction testing and validation workflows.
- Developed UI components and REST APIs using Angular, Spring Boot, and MSSQL.
- Supported bank-facing workflows used to verify transaction accuracy and speed within VisaNet.
- Angular
- Java
- Spring Boot
- MSSQL
Jun - Aug 2020
Service Reliability Intern
DBS Bank
Built API and reliability-monitoring features for internal service availability and performance reporting.
- Created REST APIs for performance data ingestion and dashboard retrieval.
- Integrated API workflows with React interfaces and MongoDB-backed data stores.
- Helped integrate static analysis and dependency security tooling into Jenkins pipelines.
- Node.js
- React
- MongoDB
- Jenkins
- Postman
Featured projects
Selected work across systems, AI, and product engineering.
A closer look at the platforms, tools, and projects that shaped how I build software.
AI-driven incident intelligence platform
Visa Aegis
Apr - May 2026
An agentic platform that automates production incident triage, root-cause analysis, and severity assessment for complex operational workflows.
- Designed and built a multi-agent system that performs targeted troubleshooting, reducing manual investigation across high-friction incident response phases.
- Built a LangGraph pipeline with parallel fan-out context retrieval, cross-model self-critique, and conditional human-in-the-loop gating.
- Combined backend RAG retrieval over runbooks and historical incident knowledge with tool-calling capabilities for post-analysis Q&A.
Python LangGraph RAG ChromaDB GPT-5.4 Claude Opus 4.7
Machine learning for trading
Random Forest Stock Trader
Oct - Nov 2024
A Random Forest strategy trained with Bollinger Bands, Relative Strength Index, and Stochastic Oscillator indicators as part of Georgia Tech CS7646.
- Outperformed the benchmark buy-and-hold strategy by 150% in-sample and 40% out-of-sample.
- Built manual and learned strategies for controlled comparison across the same trading constraints.
- Used bagging with 20 randomized decision trees to generate trading signals.
Python Pandas NumPy Scikit-learn Matplotlib
Full-stack price intelligence platform
StalkFish
Aug - Nov 2021
A microservices web application for a Singapore SME to monitor e-commerce competitor prices through web scraping, data visualization, and machine learning.
- Built a platform that automated competitor price monitoring across multiple e-commerce channels.
- Implemented dashboards, Telegram notifications, and pricing-model support for business users.
- Designed a cloud-native stack across React, AWS, Nginx, Kubernetes, MongoDB, PostgreSQL, Hasura GraphQL, and Python services.
React AWS Kubernetes MongoDB PostgreSQL Hasura Python
Skills
Built around systems engineering, backend platforms, and applied AI.
Systems
- C++
- Boost
- Sockets
- Multithreading
- Linux
- Low-latency services
AI / ML
- Python
- LangGraph
- RAG
- Claude Code
- Codex
- Copilot
- ChromaDB
- Scikit-learn
- Pandas
- NumPy
Backend
- Go
- Java
- Spring Boot
- Flask
- SQL
- API design
Cloud / Data
- Docker
- MongoDB
- PostgreSQL
- Firebase
Engineering
- Git
- CI/CD
- Jenkins
- Postman
- Secure engineering
- Maintainability
Education and leadership
Academic foundation and leadership highlights.
Education
Georgia Institute of Technology
Aug 2024 - Present
Online Master of Science in Computer Science
Coursework: Artificial Intelligence, Machine Learning for Trading, AI Ethics, Game AI, Computer Networks.
National University of Singapore
Aug 2018 - Jun 2022
Bachelor of Computing (Honours) in Computer Science
NUS Merit Scholarship.
Leadership
Vice-Captain, Varsity Water Polo Team
Jun 2019 - May 2020
National University of Singapore
Accomplishments: led team to 1st place in SUNIG 2019 (Singapore University Games), NUS Open Water Polo League 2019.
Officer
Dec 2016 - Dec 2017
Singapore Armed Forces
Awarded the BMTC Commander Coin for exceptional performance as a platoon commander.