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I design the architecture. AI agents build inside it.

Senior Full Stack Engineer with 8+ years, specialized in Vue/Nuxt, plus React/Next.js, Node.js and AWS. I’ve migrated monoliths to microservices, rebuilt legacy frontends and shipped AI-powered products, all remote and all to production. Today I build with AI agents, spec first: I define the structure, the agent writes the code, and I review it against the requirements. Currently available.

Selected projects from the last 8 years

Project NearAsk
Project Pikuro
Project Arsipa
Project Kinderleicht
Project AWARE7
Project AI Think
Project Rosypet
Project PawCompass
Project GoSpendl
Project travel blog
Project L1R1
Project Smart Agency
Project Heiland Appointment Booking
Project Pongmaster
Project Upljft Dinnerbier
Project Upljft EnBW
Project Upljft Yogagraphy
Project NearAsk
Project Pikuro
Project Arsipa
Project Kinderleicht
Project AWARE7
Project AI Think
Project Rosypet
Project PawCompass
Project GoSpendl
Project travel blog
Project L1R1
Project Smart Agency
Project Heiland Appointment Booking
Project Pongmaster
Project Upljft Dinnerbier
Project Upljft EnBW
Project Upljft Yogagraphy
Project NearAsk
Project Pikuro
Project Arsipa
Project Kinderleicht
Project AWARE7
Project AI Think
Project Rosypet
Project PawCompass
Project GoSpendl
Project travel blog
Project L1R1
Project Smart Agency
Project Heiland Appointment Booking
Project Pongmaster
Project Upljft Dinnerbier
Project Upljft EnBW
Project Upljft Yogagraphy
Project NearAsk
Project Pikuro
Project Arsipa
Project Kinderleicht
Project AWARE7
Project AI Think
Project Rosypet
Project PawCompass
Project GoSpendl
Project travel blog
Project L1R1
Project Smart Agency
Project Heiland Appointment Booking
Project Pongmaster
Project Upljft Dinnerbier
Project Upljft EnBW
Project Upljft Yogagraphy

About Me

I’m a Senior Full Stack Engineer with 8+ years of experience, specialized in Vue/Nuxt and certified in Vue.js and React. At Heiland I led the split of a monolithic Node.js backend into 20+ Lambda functions and 4 Beanstalk microservices, built an event-driven cashback payout system for 1,500+ veterinary practices, a multi-tenant booking tool and a Vue 3/Nuxt 3 frontend split, and mentored 2 junior developers. I build with AI agents, spec first: I define the structure, the agent writes code inside it, and I review the result against the requirements. New products start with GitHub Spec Kit, existing codebases with OpenSpec. On NearAsk, a mobile app that finds local shops for a specific product, I talked through open questions with Claude, researched third-party providers and wrote the decisions down as specs before any code existed. Many problems showed up there, where fixing them cost a conversation instead of a rewrite. Maintenance runs the same way. On Kinderleicht, a booking platform for a family-course studio, a nightly Claude routine takes labeled GitHub issues and opens pull requests, and every morning I review each PR against its ticket’s requirements.

Work Experience

08 2026 — present

07 2026 — present

12 2025 — 06 2026

10 2025 — present

02 2026 — 03 2026

05 2025 — 11 2025

11 2019 — 06 2020

02 2018 — 10 2019

Certifications

Officially certified by the teams behind the frameworks I use every day.

Latest Articles

A featured case study and my latest articles.
Featured

One Maintenance Session on an Agent-Assisted Client Project

75 commits, 141 tests, and a schema tool that's banned from the project on purpose. What one maintenance pass on a Claude-Code-assisted booking site actually surfaced, once the seams started showing.

Storyblok as a WordPress Alternative: One Client Build

A booking site for a family-course studio, built in about two months. What went into Storyblok, what stayed in Postgres, and why the client maintains her own content without calling me.

Vue vs React: What Vapor Mode Actually Changes

I've built every business project on Vue and Nuxt for seven years, and two recent ones in React and Next.js instead. Here's what genuinely felt different for headless CMS frontends, and why Vue just walked away from the virtual DOM entirely.

How Claude Skills + MCP Track My Capital Gains Tax

I run ETFs through two brokers that don't talk to each other. Here's how a Claude skill and an MCP-backed tracker keep them reconciled against one shared tax-free allowance.
Highly recommend Niklas! As the founder of kinderleicht, having a professional website was especially important to me—and at first, I was unsure about outsourcing this task. Today, I’m more than happy! Niklas works quickly, is reliable, and accommodates individual requests—from design to the booking system. What’s especially great: There are easy-to-follow instructions for everything I can manage on my own. I highly recommend him, even for smaller businesses!
Charline Becker

Charline Becker

CEO at Kinderleicht

Niklas knows his stuff, works reliably, and delivers high quality. I can highly recommend his services. He was an asset to our team, quickly familiarized himself with the technology and our development processes, and was thus able to work through tickets and tasks independently in a timely manner.
Niklas Donges

Niklas Donges

CTO at L1R1 technologies GmbH

Niklas provided crucial support to our team in the further development of our SaaS product. With his expertise in full-stack development and his focus on front-end technologies such as Vue.js, he was a valuable asset. He always completed his tasks reliably and to our complete satisfaction. His proactive approach is particularly noteworthy: he critically questions approaches and contributes his experience to planning and implementation in a profitable way.
Mark Czesnik

Mark Czesnik

CTO at Smart Agency GmbH

Over the past three years, I have enjoyed implementing new features and maintaining the existing system with Niklas. He is a helpful colleague who is interested in technology and open-minded. What I admire most about Niklas is his dedication to topics that have sparked his interest, such as pizza or Vue.
Pascal Bolten

Pascal Bolten

Software Engineering Manager at heiland GmbH

Frequently Asked Questions

Answers to common questions about my process and services.