WILLIAM JANSSEN

Full-stack problem solver driven by creativity and attention to detail

Code And Coffee

Developer Since 2022

Välkommen Till Min Portfölj

I'M WILLIAMBASED IN STOCKHOLM.

I utilize responsive design techniques to ensure a consistent experience across all devices.

TECH STACK

I specialize in Next.js, Tailwind CSS, Framer Motion, Node.js, and MongoDB, building high-performance, scalable, and visually engaging applications.

EXPERIENCE

Carelyo – Team Lead & Full-Stack Developer

Focused on Next.js, Tailwind, ShadCN, MongoDB, Node.js, and Express. Started as a full-stack developer and was promoted to Team Lead, overseeing new full-stack interns. While still contributing to development, my primary focus shifted to structuring workflows, leading meetings, and ensuring alignment between interns, the Product Owner, and customers to meet business needs effectively. Additionally, worked on price conversion from USD to Naira, optimized the payment flow with Paystack, and refactored the payment model to ensure structured and reliable data handling.

Vakansa – Full-Stack Developer

Worked on optimization, significantly reducing costs by improving image handling with Cloudinary. Resolved self-referencing canonical tags, improving SEO performance to 96. Ensured consistency and a high-quality visual experience across the application. Focused on website performance, accessibility (WCAG AA compliance), SEO, and overall user experience. Tech stack included React, CSS, Node.js, and MongoDB.