I’m a full-stack engineer who enjoys building reliable backend services and polished React/TypeScript frontends end to end. I’ve shipped Spring Boot microservice backends and REST APIs, designed access-control and analytics platform features, and optimized data/query performance using caching, precomputation, and practical database migrations. I also like turning automation ideas into working products, from my own job-application Chrome extension that syncs structured records to Notion to real-world integrations across major ad platforms. I work well in collaborative, CI/CD-driven teams, and I’m comfortable using AI coding assistants to accelerate development while keeping quality and maintainability front and center.

Qingxuan (Liz) Wang

I’m a full-stack engineer who enjoys building reliable backend services and polished React/TypeScript frontends end to end. I’ve shipped Spring Boot microservice backends and REST APIs, designed access-control and analytics platform features, and optimized data/query performance using caching, precomputation, and practical database migrations. I also like turning automation ideas into working products, from my own job-application Chrome extension that syncs structured records to Notion to real-world integrations across major ad platforms. I work well in collaborative, CI/CD-driven teams, and I’m comfortable using AI coding assistants to accelerate development while keeping quality and maintainability front and center.

Available to hire

I’m a full-stack engineer who enjoys building reliable backend services and polished React/TypeScript frontends end to end. I’ve shipped Spring Boot microservice backends and REST APIs, designed access-control and analytics platform features, and optimized data/query performance using caching, precomputation, and practical database migrations.

I also like turning automation ideas into working products, from my own job-application Chrome extension that syncs structured records to Notion to real-world integrations across major ad platforms. I work well in collaborative, CI/CD-driven teams, and I’m comfortable using AI coding assistants to accelerate development while keeping quality and maintainability front and center.

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Experience Level

Expert
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Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
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Intermediate
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Work Experience

Senior Big Data Platform Engineer at ZhongAn Online P&C Insurance Co., Ltd. (HKEX: 6060)
October 1, 2021 - August 1, 2024
Owned the RBAC access-control module and dashboard admin backend for an internal analytics platform serving 10+ departments, including cross-module integration, permission configuration, database initialization, and deployment support across subsidiary companies. Reduced high-frequency query latency from 10+ seconds to milliseconds for 4 analytics models using precomputation workflows, query-path optimization, and Redis caching. Delivered REST API integrations and backend modules for ad delivery partnerships across TikTok, Tencent, and Baidu to support cross-platform marketing attribution. Led the migration of 5 analytics models from ClickHouse to Hologres with SQL refactoring, multi-database adapter design, and post-migration stabilization. Improved ClickHouse query performance by 30% via partition redesign, indexing optimization, and materialized views across event, funnel, and retention models.
Java Backend Developer at ArcherMind Technology Co., Ltd. (SZSE: 300598)
September 1, 2020 - October 1, 2021
Architected an order management module with RabbitMQ-based asynchronous processing and RBAC access control to prevent cross-department data leakage across 7 business units. Removed peak-traffic bottlenecks on critical order read paths by introducing Redis caching and automated CDR generation and downstream file delivery via scheduled jobs to FTP and FastDFS. Centralized log aggregation with Elasticsearch and Kibana to enable end-to-end order tracing and faster anomaly investigation.

Education

Master of Computational Sciences at Laurentian University
September 1, 2024 - December 1, 2025

Qualifications

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Industry Experience

Financial Services, Software & Internet, Computers & Electronics

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
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