Jay Lee

Software Engineer

Singapore, Singapore, Singapore7 yrs 3 mos experience

Most Likely To Switch

Key Highlights

Expert in high-frequency trading systems.
Proven track record in optimizing search algorithms.
Skilled in developing robust backend systems.

Stackforce AI infers this person is a Backend Engineer in E-commerce and Fintech with expertise in high-performance systems.

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Skills

Core Skills

High-frequency TradingC++Go (programming Language)AwsPerformance OptimizationBusiness Rule EngineA/b TestingRuby On RailsRubyPythonMachine Learning

Other Skills

AlgorithmsAmazon Web Services (AWS)Collaborative FilteringJavaKoreanLinuxMySQLObject-Oriented Programming (OOP)OpenCVPython (Programming Language)SQLSearch AlgorithmsSearch QueriesShell Scripting

About

I’m a software engineer with experience in building and optimizing systems for high-frequency trading and large-scale distributed applications. My work focuses on creating reliable and efficient tools in C++, Python, Go, and Linux scripting. At Headlands Technologies, I work on automated monitoring systems, back-office tools, and real-time trading operations. Before that, I developed search systems at Shopee that handled billions of daily queries across multiple countries. I enjoy tackling the technical challenges of building and optimizing systems that are both fast and resilient, especially in dynamic, high-performance environments.

Experience

7 yrs 3 mos

Total Experience

1 yr 9 mos

Average Tenure

2 yrs 10 mos

Current Experience

Headlands technologies llc

Trade Operations Engineer

Aug 2023 – Present · 2 yrs 10 mos · Singapore · On-site

C++Python (Programming Language)LinuxShell ScriptingSQLHigh-Frequency Trading

Shopee

Software Engineer

Jun 2021 – Jul 2023 · 2 yrs 1 mo · Singapore

Engineered a search service across 9 countries, managing nearly one billion queries daily with high efficiency and stability using Go.
Optimized a search censoring library using algorithms, reducing resource usage by over 90% and improving performance.
Implemented a business rule engine for search queries, reducing rule change latency from 7 days to 5 minutes.
Led A/B tests to optimize search algorithms, improving order rates by 5% through tailored, country-specific strategies.

Amazon Web Services (AWS)Go (Programming Language)Object-Oriented Programming (OOP)LinuxAWS

Crema

Software Engineer

Aug 2020 – Apr 2021 · 8 mos · Seoul, South Korea

Built a backend data processing system using Ruby on Rails for a recommendation service based on collaborative filtering, improving click-through rates by over 10% for 150+ e-commerce companies.
Developed personalized marketing workflow services and admin tools using Ruby and MySQL.

Amazon Web Services (AWS)Object-Oriented Programming (OOP)Ruby on RailsLinuxAWS

Samsung electronics

Software Engineer

Jul 2020 – Aug 2020 · 1 mo · South Korea

Took an advanced C++ algorithm training.
Developed a YOLO-based ML image detection algorithm from a video using Python.

JavaObject-Oriented Programming (OOP)Python (Programming Language)C++Python

Republic of korea army

Network Specialist

May 2018 – Jan 2020 · 1 yr 8 mos · Paju, Gyeonggi, South Korea

Managed and maintained critical network infrastructure, ensuring 24/7 system availability.
Developed diagnostic tools to identify and resolve network issues efficiently.

Object-Oriented Programming (OOP)