Hi, I'm
Johnny Barendrecht
Full-Stack Engineer
React · Next.js · TypeScript · Node.js
I build fast, scalable web applications for startups and businesses.
See my workServices
I help startups and companies design, build, and scale high-quality web applications.
Full-Stack Development
I build complete web applications using React, Next.js, and Node.js — from backend systems to polished user interfaces, ready for production.
Frontend Architecture
I design scalable, maintainable frontend systems with clean component structures and strong performance.
API Design & Integration
I design and integrate reliable APIs and connect third-party services to build secure and scalable backend systems.
MVP & Product Development
I help turn ideas into production-ready products quickly, with a focus on clean implementation and scalability.
Featured Project
BuskLab
A two-sided marketplace for street performers.
BuskLab connects street performers with fans, venues, and opportunities. It's a full-featured marketplace that handles everything from performer discovery and booking to payments and merchandise — built from the ground up as a solo developer.
Two-Sided Marketplace
Separate flows for performers and fans with role-based access control.
Stripe Connect Payments
Secure payment processing with split payouts to performers.
Print-on-Demand Merch
Gelato integration for custom merchandise fulfillment.
Real-Time Messaging
Direct messaging between performers and fans/venues.
Venue Booking System
End-to-end booking flow with availability management.
AWS Infrastructure
S3 for media storage, CloudFront CDN for global delivery.
Core Technologies
Technologies I use to build scalable, production-ready applications.
What I Optimize For
Frontend
Backend
Cloud & Infrastructure
Payments & Integrations
Testing
About Me
I'm a freelance full-stack engineer based in Berlin, focused on building fast, scalable, and maintainable web applications with React, Next.js, and TypeScript.
With over 6 years of professional experience, I've worked on production systems used by real users, delivering reliable solutions across frontend and backend. I care about clean architecture, performance, and building software that is easy to maintain and extend.
I work with startups and companies to turn ideas into high-quality web products — from first concept to production.
Experience
Full-Stack Engineer
Freelance / BuskLab
Building a two-sided marketplace from scratch, including payments, real-time messaging, and cloud infrastructure — owning the product end-to-end while working with clients as a freelance full-stack engineer.
Web Engineer
The Modern Engineers GmbH
Built a pipeline management platform that streamlined client tracking and internal workflows, while improving delivery through CI/CD automation and mentoring a junior developer.
Frontend Engineer
Virtual Identity AG
Delivered production web applications for enterprise clients across multiple industries, building dashboards, CMS integrations, and scalable component systems.
Junior Full-Stack Developer
Atheneum Partners
Built internal tools and a booking system on AWS that improved day-to-day workflows and supported global internal operations.
Let's work together
Currently available for freelance projects.
Let's talkBased in Berlin, available for remote work across Europe.