KENGUE JIOKEU DONALD

Blue Window Ltd has a brand optimization system to strengthen companies' online presence. This SEO-focused system covers both paid advertising and free Google optimization strategies it stands out for its focus on I-gaming advertising for casinos, bookmakers and bingos, with customized widgets and content.

Actions taken:

• Worked on feature exploration and upgrades to improve overall functionality (both back-end and front-end) and user experience of system
• Significantly reduced data loading time by 23 seconds by integrating scheduled Cloudflare Cron tasks to synchronize GraphQL data to Cloudflare KV storage, using KV storage as new, faster data source
• Optimized data hydration by using Sanity.io hooks to create projections, saving pre-hydrated data and eliminating need for constant hydration, streamlining processing workflows
• Conceptualized and developed data scraping system to test 'litemode' functionality (system designed to dynamically modify website content based on location and time). This initiative was particularly successful, as it considerably reduced time needed to check that 'litemode' from manual tests taking hours to be done by QA, to automed checks taking just few seconds and even giving detailed report about tests done.
• Identified and eliminated performance bottlenecks by determining root causes and remediating problematic code

• Worked on responsive design and functionalities of e-commerce management platform 'buy1way'(https://www.buy1way.com/) Implemented authentication system for 'MedicalIs' application (https://mis.intelso.cm/), as well as integrating notifications with Socket.io, and adding numerous user functionalities
• Worked on multiples rest API made with js (Node.js and Next.js) linked to NoSQL and MySQL database.
• Improved software efficiency by troubleshooting and resolving coding issues.
• Achieved faster development cycles using Agile methodologies, including Scrum or Kanban processes.
• Implemented automated testing frameworks, reducing bugs at launch and ensuring higher quality releases

Optimized front-end performance by employing minification tools and adhering to best practices in AngularJS coding standards.

• Developed and implemented data model and project architecture for enterprises management system. This system facilitates management of company resources, including project management, employee work organization and activity planning. Made with Angular for frontend, Express.js for backend, Sequelize and RxJS
• Designed and modeled platform dedicated to management of schoolchildren and students (https://skouconnect.web.app/), with aim of simplifying follow-up for young people and their parents. This resulted in 25% reduction in administrative workload, and increased parental engagement by 35% thanks to notification system implemented.
• Implemented CI/CD pipelines for automated testing and deployment processes, increasing efficiency in software release cycle.
• Integration of Stripe payment and reimbursement system
• Management of in-house development team with collaborative environment.

Created several customer websites based on Wordpress CMS and optimization of each of their Core Web Vitals, which improved Largest Contentful Paint (LCP) scores by average of 60% across 30 customer sites and enhanced Cumulative Layout Shift (CLS) scores by 70% on 40 news-focused websites, resulting in 25% decrease in bounce rates

• Participated in configuration and initial implementation of 'OpenLMIS' solution for management of FOSA (Formations Sanitaires) in Cameroon as part of project. Configured system to manage over 10 FOSA records annually, increasing compliance monitoring efficiency by 40%.
• Boosted customer satisfaction rates through timely resolution of reported technical issues during support phase of projects.