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I’m a backend and cloud engineer with a postgraduate focus and about 4 years of hands-on experience in backend development, cloud systems, and Web GIS. I enjoy solving complex problems in distributed systems, real-time processing, and high-concurrency environments, with a strong Java backend foundation. I aim to build scalable, robust systems that teams can trust and extend. I’m comfortable with TCP servers, Redis, and cloud-based architectures, and I have additional exposure to database management, server operations, and applying machine learning in production. I work well across teams, value clean interfaces, and embrace modern tooling (Docker, Kubernetes, AWS) and CI/CD workflows to ship reliable software quickly.…I’m a backend and cloud engineer with a postgraduate focus and about 4 years of hands-on experience in backend development, cloud systems, and Web GIS. I enjoy solving complex problems in distributed systems, real-time processing, and high-concurrency environments, with a strong Java backend foundation. I aim to build scalable, robust systems that teams can trust and extend. I’m comfortable with TCP servers, Redis, and cloud-based architectures, and I have additional exposure to database management, server operations, and applying machine learning in production. I work well across teams, value clean interfaces, and embrace modern tooling (Docker, Kubernetes, AWS) and CI/CD workflows to ship reliable software quickly.

Leon Lee

Back-End Developer, AI Engineer, Data Scientist, +1

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I’m a backend and cloud engineer with a postgraduate focus and about 4 years of hands-on experience in backend development, cloud systems, and Web GIS. I enjoy solving complex problems in distributed systems, real-time processing, and high-concurrency environments, with a strong Java backend foundation. I aim to build scalable, robust systems that teams can trust and extend. I’m comfortable with TCP servers, Redis, and cloud-based architectures, and I have additional exposure to database management, server operations, and applying machine learning in production. I work well across teams, value clean interfaces, and embrace modern tooling (Docker, Kubernetes, AWS) and CI/CD workflows to ship reliable software quickly.…I’m a backend and cloud engineer with a postgraduate focus and about 4 years of hands-on experience in backend development, cloud systems, and Web GIS. I enjoy solving complex problems in distributed systems, real-time processing, and high-concurrency environments, with a strong Java backend foundation. I aim to build scalable, robust systems that teams can trust and extend. I’m comfortable with TCP servers, Redis, and cloud-based architectures, and I have additional exposure to database management, server operations, and applying machine learning in production. I work well across teams, value clean interfaces, and embrace modern tooling (Docker, Kubernetes, AWS) and CI/CD workflows to ship reliable software quickly.

Available to hire

I’m a backend and cloud engineer with a postgraduate focus and about 4 years of hands-on experience in backend development, cloud systems, and Web GIS. I enjoy solving complex problems in distributed systems, real-time processing, and high-concurrency environments, with a strong Java backend foundation. I aim to build scalable, robust systems that teams can trust and extend.

I’m comfortable with TCP servers, Redis, and cloud-based architectures, and I have additional exposure to database management, server operations, and applying machine learning in production. I work well across teams, value clean interfaces, and embrace modern tooling (Docker, Kubernetes, AWS) and CI/CD workflows to ship reliable software quickly.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Backend & Cloud Systems Developer

January 1, 2019 - February 1, 2020

Developed and maintained backend and cloud-based systems, including distributed applications; built and supported frontend web applications; deployed AI models within backend systems; contributed to geospatial Web GIS application development; supported system operations and IoT device development.

Java TCP Server Developer

June 1, 2020 - October 1, 2021

Developed a Java TCP server for real-time multi-user synchronization; implemented authentication; designed client–server architecture over TCP; contributed to an Enterprise Resource Management System; responsibilities included server architecture, authentication flows, and performance considerations.

AI-Driven Job Automation Platform Developer

April 1, 2026 - Present

Developed an AI-driven job automation platform integrating Node.js backend services, Playwright browser automation, and AI agent workflows. Built modular worker services and long-lived AI automation workers for job information fetching and browser task execution; implemented queued AI handlers to prevent concurrent browser conflicts; designed state-machine based worker lifecycle and unified AI service architecture with extensible Gemini/GPT/Copilot provider adapters. Supported deployment and run-time validation in a Linux environment with service orchestration, health checks, and remote synchronization workflows.

AI Image Classification Pipeline Developer

March 1, 2026 - May 1, 2026

Multi-model image classification and ensemble pipeline for medical Petri dish analysis. Responsibilities included PyTorch model development (ConvNext, EfficientNet), training pipelines, hyperparameter tuning, evaluation and predictive aggregation. Implemented class-wise weighted ensemble for improved accuracy.

AWS Cloud-Native Uber-like App Architect

June 1, 2025 - November 1, 2025

Distributed backend system development using Java & Spring Boot; concurrency handling for real-time operations; caching and session management; cloud deployments; CI/CD pipeline implementation; designed distributed system architecture with scalable backend and service orchestration.

Vision-Based Autonomous Handling Robot – Competition Participant

June 1, 2016 - June 1, 2017

Participated in Vision-Based Autonomous Handling Robot competition; secured 2nd place in the National Military Mathematics Modeling Competition.

Optimization Model for Island-Defense Weapon Placement

July 1, 2018 - October 1, 2018

Developed optimization model for island-defense weapon placement; awarded 1st place in Hobbie Hiking, Running, Video Game Making competition (referee preference).