Full-Stack Developer building scalable SaaS platforms and modern web applications with React and Next.js
Services
I build modern, scalable applications with full-stack expertise and deliver pixel-perfect designs.
Projects
A selection of my recent work. Each project reflects my commitment to clean code and user-centered design.
Yup.io
Contributed to the evolution of Yup.io, a growing SaaS platform, by redesigning the core architecture to transition the site into a high-performance web application. Specialized in delivering a production-ready frontend by refactoring legacy components into a modern React and TailwindCSS framework.
Bullshit Map
Full-stack platform transforming NFC interactions into a global map. Built with Next.js 15, React 19, and MapboxGL on the frontend. Backend powered by Node/Express/TypeScript with MongoDB 6 geospatial queries.
Michal B
Portfolio website for an artist featuring a clean, minimal design with smooth animations and responsive layouts. Built with modern web technologies to showcase artwork in an elegant gallery format.
Better Together
Custom landing page and portfolio for Ofir, a personal coach and soulful events organizer based in Tel Aviv. Built as a fully Hebrew RTL experience for women seeking personal development coaching and community events. Features a one-page scrolling layout with sections for coaching services, workshops, photo gallery, client testimonials, and contact. Includes a custom WCAG 2.1 AA accessibility widget and Decap CMS integration - so Ofir can update her own content, images, and events independently without touching code.
Yup.io
Contributed to the evolution of Yup.io, a growing SaaS platform, by redesigning the core architecture to transition the site into a high-performance web application. Specialized in delivering a production-ready frontend by refactoring legacy components into a modern React and TailwindCSS framework.
Bullshit Map
Full-stack platform transforming NFC interactions into a global map. Built with Next.js 15, React 19, and MapboxGL on the frontend. Backend powered by Node/Express/TypeScript with MongoDB 6 geospatial queries.
Michal B
Portfolio website for an artist featuring a clean, minimal design with smooth animations and responsive layouts. Built with modern web technologies to showcase artwork in an elegant gallery format.
Better Together
Custom landing page and portfolio for Ofir, a personal coach and soulful events organizer based in Tel Aviv. Built as a fully Hebrew RTL experience for women seeking personal development coaching and community events. Features a one-page scrolling layout with sections for coaching services, workshops, photo gallery, client testimonials, and contact. Includes a custom WCAG 2.1 AA accessibility widget and Decap CMS integration - so Ofir can update her own content, images, and events independently without touching code.
About Me
SMILEYSOLUTIONS | KIM KROLL
Full-Stack Developer · SaaS & Web Applications
I'm a Full-Stack Developer focused on building production-ready web applications and digital products. I work across the entire stack - from frontend development with React and Next.js, through API development and backend logic, to cloud deployments using Docker and AWS.
I've shipped features and led refactors on production SaaS platforms, improving performance, reliability, and developer experience under real-world load.
My current focus is scalable architecture and high-performance web application development — building platforms that hold up under real growth, not just demos.
Contact
Ready to build
something amazing?
I'm currently available for freelance projects and full-time opportunities. Let's create something extraordinary together.
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