Niklas Grieger - Senior Full Stack Developer

Q: Where is Niklas based?

Niklas is based in Norderstedt, Germany .

Q: What languages does Niklas speak?

Niklas speaks the following languages: German (Native), English (Advanced) .

Q: How many years of experience does Niklas have?

Niklas has at least 7 years of experience. During this time, Niklas has worked in at least 6 different roles and for 6 different companies . The average length of individual experience is 1 year and 2 months . Note that Niklas may not have shared all experience and actually has more experience.

Q: What is Niklas's latest experience?

Niklas's most recent position is Senior Full Stack Developer at L1R1 technologies GmbH .

Q: What companies has Niklas worked for in recent years?

In recent years, Niklas has worked for L1R1 technologies GmbH , SmartAgency GmbH , Okapi GmbH , and Heiland GmbH .

Q: Which industries is Niklas most experienced in?

Niklas is most experienced in industries like Retail , Information Technology (IT) , and Professional Services . Niklas also has some experience in Sport and Recreation .

Q: Which business areas is Niklas most experienced in?

Niklas is most experienced in business areas like Information Technology (IT) , Product Development , and Quality Assurance (QA) .

Q: Which industries has Niklas worked in recently?

Niklas has recently worked in industries like Retail , Information Technology (IT) , and Professional Services .

Q: Which business areas has Niklas worked in recently?

Niklas has recently worked in business areas like Information Technology (IT) , Product Development , and Quality Assurance (QA) .

Recommended expert

Norderstedt, Germany

Experience

Feb 2025 - Apr 2025

3 months

Germany

Senior Full Stack Developer

L1R1 technologies GmbH

Migrated the Billomat API integration to InvoiceNinja API, boosting system reliability by 33% for 1300 users.
Established an ESLint configuration with Husky and lint-staged, resulting in a 23% decrease in code review issues and refined code consistency across 5 repositories.
Improved team processes by refining the Kanban workflow.
Optimized frontend performance, built a new CI/CD pipeline, and implemented AWS resource monitoring to strengthen deployment reliability and system observability.

Sep 2024 - Jan 2025

5 months

Germany

Senior Vue.js Developer

SmartAgency GmbH

Developed new Vue.js components and resolved bugs in existing implementations.
Translated complex Figma designs into responsive, production-ready web pages.
Optimized frontend performance, decreasing page load times by 26% and enhancing user experience for 1600 monthly visitors.

May 2024 - Aug 2024

4 months

Germany

React Native Developer

Okapi GmbH

Developed new features including a Google Maps filter to narrow down outdoor table tennis tables.

Jul 2020 - Apr 2024

3 years 10 months

Germany

Senior Full Stack Developer / Lead Developer

Heiland GmbH

Led key decisions and implementations in cloud infrastructure design.
Mentored 2 team members, accelerating onboarding and advancing code quality across the development team.
Maintained and enhanced the B2B e-commerce shop, elevating platform stability.
Led migrations and refactoring of legacy code to reduce technical debt and decrease bug incidence.

Nov 2019 - Jun 2020

8 months

Germany

Full Stack Web Developer / Lead Developer

upljft GmbH

Engineered a REST API in Laravel to generate Yogagraphy images, serving 1200 users and automating image generation workflows.
Automated image generation from custom strings and sent personalized Christmas emails to customers via Mailchimp.
Implemented a new CI/CD pipeline with Docker in GitLab, reducing deployment times and improving release reliability.
Delivered end-to-end web solutions for clients, ranging from small business sites to large-scale enterprise applications, resulting in 3 successful project launches.
Served as primary technical contact for customer projects, ensuring timely delivery and maintaining client satisfaction.

Feb 2018 - Oct 2019

1 year 9 months

Germany

Full Stack Developer

Otto Group Solution Provider (OSP) GmbH

Enhanced Android (Java) and iOS (Swift) apps, adding new features and improving app stability for 2000 users.
Developed a REST API for dynamic template generation and mass dispatch of SMS and emails for a parcel service, processing 300,000 messages per month.
Developed an online training course administration platform, enabling users to access and manage training content efficiently.
Acted as technical point of contact, facilitating cross-team collaboration and ensuring project milestones were met on schedule.

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Retail (5.5 years), Information Technology (3.5 years), Professional Services (0.5 years), and Sport (0.5 years).

Retail

Information Technology

Professional Services

Sport

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (7 years) and Product Development (6.5 years).

Information Technology

Product Development

Summary

Full-stack developer with over 6 years of experience architecting scalable web applications using Vue.js/Nuxt (v2 & v3), Node.js and Java Spring Boot. Led end-to-end migrations from monolithic to microservices architectures in AWS and implemented CI/CD pipelines across GitHub, Bitbucket and GitLab. Authored 5 open-source Vue/Nuxt libraries with up to 9100 Monthly downloads.

Skills

Frontend

Javascript
Typescript
Vue.js (2 & 3)
Vue Router
Vuex
Pinia
Vuetify
Nuxt.js (2 & 3)
React
Sass/scss
Tailwind Css
Vitest
Playwright

Backend

Node.js
Java (Spring Boot)
Restful Api Design

Database

Postgresql
Nosql (Mongodb)

Devops

Aws (Lambda, Api Gateway, Beanstalk, Cloudformation, Ec2)
Ci/cd Pipelines (Gitlab, Github, Bitbucket)
Docker

Mobile Development

React Native
Flutter (Dart)

Languages

German

Native

English

Advanced

Education

Professional School ITECH

Vocational Diploma in Application Development · IT specialist in Application development · Hamburg, Germany

Professional School Farmsen

Technical Assistant Diploma · Computer Science Technical Assistance · Hamburg, Germany

Certifications & licenses

Vue.js Senior Developer

Vue School

Vue.js Developer

Vue School

Profile

Created

August 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Niklas based?

Niklas is based in Norderstedt, Germany.

What languages does Niklas speak?

Niklas speaks the following languages: German (Native), English (Advanced).

How many years of experience does Niklas have?

Niklas has at least 7 years of experience. During this time, Niklas has worked in at least 6 different roles and for 6 different companies. The average length of individual experience is 1 year and 2 months. Note that Niklas may not have shared all experience and actually has more experience.

What roles would Niklas be best suited for?

Based on recent experience, Niklas would be well-suited for roles such as: Senior Full Stack Developer, Senior Vue.js Developer, React Native Developer.

What is Niklas's latest experience?

Niklas's most recent position is Senior Full Stack Developer at L1R1 technologies GmbH.

What companies has Niklas worked for in recent years?

In recent years, Niklas has worked for L1R1 technologies GmbH, SmartAgency GmbH, Okapi GmbH, and Heiland GmbH.

Which industries is Niklas most experienced in?

Niklas is most experienced in industries like Retail, Information Technology (IT), and Professional Services. Niklas also has some experience in Sport and Recreation.

Which business areas is Niklas most experienced in?

Niklas is most experienced in business areas like Information Technology (IT), Product Development, and Quality Assurance (QA).

Which industries has Niklas worked in recently?

Niklas has recently worked in industries like Retail, Information Technology (IT), and Professional Services.

Which business areas has Niklas worked in recently?

Niklas has recently worked in business areas like Information Technology (IT), Product Development, and Quality Assurance (QA).

What is Niklas's education?

Niklas holds a Bachelor in IT specialist in Application development from Professional School ITECH and a Bachelor in Computer Science Technical Assistance from Professional School Farmsen.

Does Niklas have any certificates?

Niklas has 2 certificates. These include: Vue.js Senior Developer and Vue.js Developer.

What is the availability of Niklas?

Niklas is immediately available for suitable projects.

What is the rate of Niklas?

Niklas's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.