Lena H. TOP RATED
Senior React & Next.js engineer
Berlin, Germany · Available now
€75/hr
Log in to hireAbout
I build fast, accessible web apps with React and Next.js for SaaS teams across Europe. 9 years of experience, from early-stage MVPs to products with millions of users. I care about clean architecture, tests and shipping on time.
Recent work: a B2B billing portal (Next.js + Stripe-like payments), a design-system migration for a fintech, and performance work that cut LCP by 60%.
Portfolio
B2B billing portal
Next.js app with role-based access and invoicing for 4,000 business customers.
Design system migration
Moved 120 screens to a token-based component library.
Work history & reviews (6)
I will build a full-stack web app with Next.js and PostgreSQL5.0
“Very professional. Clear milestones, honest estimates and quality work.”
Pierre L. · France · 2 Oct 2026Marketing site rebuild in Next.js5.0
“Excellent communication and delivered ahead of schedule. Clean, well-documented work. Would hire again.”
Sofia L. · Sweden · 23 Sept 2026I will build a full-stack web app with Next.js and PostgreSQL5.0
“Fast, reliable and easy to work with. The result exceeded our expectations.”
Karim H. · Belgium · 15 Sept 2026
Checkout flow improvements5.0
“Understood the problem quickly and proposed a better solution than we had in mind. Great experience.”
Pierre L. · France · 29 Aug 2026Admin dashboard for operations5.0
“Very professional. Clear milestones, honest estimates and quality work.”
Karim H. · Belgium · 4 Aug 2026
API integration with ERP4.0
“Fast, reliable and easy to work with. The result exceeded our expectations.”
Erik J. · Finland · 10 Jul 2026Services by Lena
Employment
Senior React & Next.js engineer
Zalando · 2016–2021
Education
TU Munich
MSc Computer Science · 2010–2012