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Hi, I'm Kai, a backend-focused software engineer with seven years of experience, including leading small teams. I excel at building full-stack systems using Node.js, React, Next.js, TypeScript, and Java with Spring, and I optimize data models and performance across Oracle, MySQL, Redis, and Elasticsearch. I'm comfortable with Linux, Git, Jenkins, and Docker, and I enjoy turning complex requirements into reliable software. I'm fluent in English for professional use and comfortable with cross-functional collaboration. My domain experience includes insurance and pension platforms, such as Insurance Online Sales System, National Pension Coordination System, and WeChat Mini Programs integration with provincial business handling.…Hi, I'm Kai, a backend-focused software engineer with seven years of experience, including leading small teams. I excel at building full-stack systems using Node.js, React, Next.js, TypeScript, and Java with Spring, and I optimize data models and performance across Oracle, MySQL, Redis, and Elasticsearch. I'm comfortable with Linux, Git, Jenkins, and Docker, and I enjoy turning complex requirements into reliable software. I'm fluent in English for professional use and comfortable with cross-functional collaboration. My domain experience includes insurance and pension platforms, such as Insurance Online Sales System, National Pension Coordination System, and WeChat Mini Programs integration with provincial business handling.

Kai

Full Stack Developer, Back-End Developer, Front-End Developer, +4

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Hi, I'm Kai, a backend-focused software engineer with seven years of experience, including leading small teams. I excel at building full-stack systems using Node.js, React, Next.js, TypeScript, and Java with Spring, and I optimize data models and performance across Oracle, MySQL, Redis, and Elasticsearch. I'm comfortable with Linux, Git, Jenkins, and Docker, and I enjoy turning complex requirements into reliable software. I'm fluent in English for professional use and comfortable with cross-functional collaboration. My domain experience includes insurance and pension platforms, such as Insurance Online Sales System, National Pension Coordination System, and WeChat Mini Programs integration with provincial business handling.…Hi, I'm Kai, a backend-focused software engineer with seven years of experience, including leading small teams. I excel at building full-stack systems using Node.js, React, Next.js, TypeScript, and Java with Spring, and I optimize data models and performance across Oracle, MySQL, Redis, and Elasticsearch. I'm comfortable with Linux, Git, Jenkins, and Docker, and I enjoy turning complex requirements into reliable software. I'm fluent in English for professional use and comfortable with cross-functional collaboration. My domain experience includes insurance and pension platforms, such as Insurance Online Sales System, National Pension Coordination System, and WeChat Mini Programs integration with provincial business handling.

Available to hire

Hi, I’m Kai, a backend-focused software engineer with seven years of experience, including leading small teams. I excel at building full-stack systems using Node.js, React, Next.js, TypeScript, and Java with Spring, and I optimize data models and performance across Oracle, MySQL, Redis, and Elasticsearch. I’m comfortable with Linux, Git, Jenkins, and Docker, and I enjoy turning complex requirements into reliable software.

I’m fluent in English for professional use and comfortable with cross-functional collaboration. My domain experience includes insurance and pension platforms, such as Insurance Online Sales System, National Pension Coordination System, and WeChat Mini Programs integration with provincial business handling.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Core Developer at DuBang Insurance Collection and Payment System

September 1, 2018 - December 1, 2020

Developed core backend modules for an insurance collection and payment system; designed data models and storage solutions; implemented backend services and integrated with frontend interfaces; contributed to robust, scalable processing workflows.

Full Stack Developer at Jinbaoxin Social Security Card Technology Co., Ltd.

December 1, 2020 - September 1, 2022

Full-stack development for social security card systems; built WeChat Mini Programs and Android clients; worked with Redis, MySQL, and REST APIs; contributed to cross-platform data synchronization and front-end integrations.

Core Developer at National Pension Coordination System

December 1, 2020 - January 1, 2022

Design and development of the national pension coordination platform; centralized data handling, middleware integration, and real-time synchronization between central and provincial systems.

Core Developer at Beijing Smart Human Resources System

January 1, 2022 - May 1, 2022

WeChat Mini Programs design and development; system version upgrades and operational tasks.

Core Developer at National Special Occupation Review System

May 1, 2022 - September 1, 2022

Design and development of the system; data integration; development of middleware services to store business data in real time.

Full Stack Developer at HuiYou Mutual Property Insurance Co., Ltd.

September 1, 2022 - Present

Full-stack development; implemented back-end and front-end integrations for insurance operations including CRM, OA, and electronic signatures; introduced WeCom backups and real-time data synchronization; system monitoring.

Core Developer at Insurance Online Sales System

September 1, 2022 - Present

Developed core modules for the online insurance sales system and led backend development. Implemented microservices patterns, enabled real-time data flows, and collaborated with front-end teams to deliver scalable features for policy handling, sales analytics, and integration with CRM/OA workflows. Technologies leveraged include Node.js, React/Next.js, TypeScript, MySQL/Oracle, Redis, and Elasticsearch.

Full Stack Developer at DuBang Insurance

September 1, 2018 - December 1, 2020

Worked on insurance collection and payment system enhancements, including backend services, data workflows, and UI/UX improvements for policy and payment processing. Contributed to system monitoring and reliability improvements.