j
j_hansen_kaizen

Julian H

@j_hansen_kaizen

Full Stack Developer

Germany
German, English, Polish
About me
I am an experienced Full-Stack Developer specializing in frontend technologies like JavaScript, TypeScript, Angular, and React/Next.js. I have a proven track record of analyzing complex requirements and implementing tailored software solutions for major clients. Additionally, I run my own development studio, Kaizen Digital Lab, where I manage web projects from conception to live operation.... Read more

Skills

j
j_hansen_kaizen
Julian H
Offline • 
Average response time: 1 hour

See my services

Custom Websites
I will build a full stack web app with nextjs supabase and stripe
From$130 / projectMore details
Hosting & Domain
I will host and maintain your website for you
From$25 / projectMore details

Portfolio

Work experience

Self_Employed

Kaizen Digital Lab

Self Employed • Self-employed

Dec 2025 - Present • 7 mos

▎ Full-Stack Web Developer & Founder at Kaizen Digital Lab (my own studio). Building custom websites and web apps end-to-end for small businesses. I handle the full stack — front-end UI, backend APIs and authentication, databases, payment integration, and deployment/hosting. ▎ Highlight project: designed and shipped a complete online catering & ordering platform — public storefront, Stripe checkout, and a full admin dashboard for menu and order management — now live and processing real customer orders. Built with Next.js, React, Supabase (PostgreSQL), Tailwind CSS, and Stripe, deployed on managed infrastructure with SSL, backups, and monitoring. ▎ I also provide ongoing hosting and maintenance so clients' sites stay fast, secure, and up to date after launch.

Company

Full-time • 4 yrs 2 mos

Software Developer (Data Integration)

Aug 2025 - Present • 11 mos

▎ Professional software developer working on data-integration and translation systems — mapping and transforming structured insurance data (biPro) between formats. Day-to-day work with data pipelines and precise, reliable transformations that reinforce a habit of clean, maintainable code.

Full-Stack Developer

Feb 2022 - May 2025 • 3 yrs 3 mos

▎ Full-Stack Developer at affinis AG, analysing, documenting and building custom software solutions for large enterprise clients. Developed a customer-acquisition web portal in Angular that improved process efficiency by 20%, implemented scalable backend services in Java (Spring Boot) and C#, and ensured code quality with Jest and Cypress. Also built an in-app role & permission system and an integrated invoicing module.