Hey, I'm Niklas Grieger Senior Full Stack Developer
I'm a passionate Senior Full Stack Developer specializing in building efficient and scalable web applications. Explore my projects, experience, and get in touch!
About Me
As a Senior Full Stack Developer with a focus on frontend since 01/2018, I'm building applications from portfolios to complex web applications such as E-Commerce Shops for B2B businesses or mobile apps with cross-frameworks React Native or Flutter.
My approach is centered around writing clean, maintainable code while ensuring optimal performance, user- and developer experience.
Work Experience
12 2025 — present
10 2025 — present
02 2026 — 03 2026
05 2025 — 11 2025
02 2025 — 04 2025
Senior Full Stack Developer atL1R1
09 2024 — 01 2025
Senior Full Stack Developer atSmart Agency
07 2020 — 04 2024
Senior Full Stack Developer atHeiland
11 2019 — 06 2020
02 2018 — 10 2019
Certifications
Officially certified by the teams behind the frameworks I use every day.
Latest Articles
Some of my recent thoughts
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
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
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
Software Engineering Manager at heiland GmbH
Frequently Asked Questions
Answers to common questions about my process and services.
I specialize in full stack web development with a focus on front-end technologies like Vue.js and Nuxt.js. My services include:
- Planning of clients needs and translateing them into technical requirements
- Create and translate designs with Figma
- Custom web application development
- Responsive UI/UX design and implementation
- E-Commerce solutions
- Performance optimization
- API integration and development
- Ongoing maintenance and support
- Mobile development with React Native or Flutter
- Fontend: VueJs, Nuxt, React, Native Javascript, TypeScript
- Backend: Node.js (Express, NestJs), Java (Spring Boot), Firebase
- Database: PostgreSQL, MySQL, MongoDB, Firebase Firestore
- Cloud: AWS (Lambda, Beanstalk, S3, Cloudformation), Firebase, Vercel
- DevOps: CI/CD (GitHub, Gitlab, Bitbucket), Docker
- Mobile: React Native, Flutter
Absolutely! I enjoy working with startups to help shape their product vision and create user-friendly interfaces from the ground up. I can adapt my process to fit the fast-paced startup environment.