Kaiyu Wei Email & Phone Number

Netherlands

Haarlem, North Holland, Netherlands

Amsterdam, North Holland, Netherlands

- Developed and maintained high-performance web applications using PHP (Laravel framework) and JavaScript, effectively handling server-side programming that supports 5.6 million monthly visitors across 21 countries in one of Europe’s largest price comparison platforms. Optimized application responsiveness and efficiency, which contributed to a 10% reduction in page load times.- Managed complex data feed processing involving millions of product entries using technologies such as RabbitMQ for message queuing, AWS for scalable cloud solutions, and Elasticsearch for efficient search functionalities, ensuring seamless data synchronization and integrity, ensuring accurate and timely availability of millions of product data.- Proficient in crafting complex SQL queries for data manipulation and analysis, demonstrating expertise in both single-table and multi-table operations. Skilled in optimizing query performance to handle large datasets effectively, ensuring efficient data retrieval and reporting for business intelligence and decision-making processes.- Engineered robust solutions for distributed systems ,enhancing scalability and reliability while maintaining real-time data processing and aggregation capabilities critical for service operation. Deployed and maintained multiple clusters of Elasticsearch, AWS services managed by Kubernetes for a large-scale application.- Experienced in designing and implementing robust cron jobs to automate routine tasks and system maintenance, such as millions of feed data downloading, feed file generation, and distributed DB sync everyday, etc. Proficient in scripting and scheduling commands to enhance system efficiency and reliability, ensuring timely execution and optimal performance of critical operations.

Amsterdam, North Holland, Netherlands

- Framework developmentDeveloped new features for and maintained Copernica’s own full-stack framework under Linux environment using PHP, C++ and JavaScript, which serves as the foundation for SaaS software development.- Database Frequently interacted with MariaDB and MongoDB. Proficient in using SQL for single-table and multi-table queries.- Web Mobile development Made web pages and mobile apps in JavaScript based on Copernica’s own frontend framework. Via theapps, users can manage millions of their customer profiles, design their email templates, schedule emails and monitor emails’performance, etc.- Containerization Employed Docker containers for local development and tests for all projects. Experience in creating, running anddebugging docker containers.- DevOps Migration of services to Kubernetes and AWS microservices, proficient in configuring, maintaining Kubernetes clusters.

S-Hertogenbosch Area

Design an online learning algorithm to control the parameters of meta-heuristic algorithms, so that they can select the most suitable parameters to gain a good performance. Code and test the online learning algorithm in Dassault Systèmes' DELMIA QUINTIQ platform and collect data, involving the use of data structure, and the in-depth use of a java-like language. Analyze the obtained data and validate the algorithm by statistical hypothesis test. The result shows high effectiveness of the algorithm.Code and move the project to Python platform, so that it can be used for more algorithms in Python. (https://github.com/KaiyuWei/parameter-control)

Shanghai, China

- Developed and maintained scalable web and mobile applications using PHP and JS for real-time monitoring and analysis of wind turbine performance, significantly enhancing operational efficiency and decision-making for top-tier energy groups across China.- Designed and implemented robust database solutions with multiple types of databases, including MySQL, MongoDB and Redis, ensuring high availability and reliability of real-time data used across the organization.- Development of distributed systems, enabling seamless data integration from multiple wind farms and enhancing system resilience and scalability.- Enhanced user experience by integrating advanced JavaScript technologies such as Node.js, React, and Express.js in the frontend development of the web applications.

Master'S Degree, Industrial Engineering

Bechelar'S Degree, Logistics