Niklas Grieger

Senior Full Stack Developer

Avatar placeholder
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.

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

Need a freelancer? Find your match in seconds.
Try FRATCH GPT
More actions

Similar Freelancers

Discover other experts with similar qualifications and experience

Mathis Dudler
Mathis Dudler

Senior Web/Frontend Developer

View Profile
Jan Lüders
Jan Lüders

Senior Developer

View Profile
Lucas Jahn
Lucas Jahn

Full-Stack Developer (WordPress, React.js)

View Profile
Nico Meyer
Nico Meyer

Freelance Fullstack Developer

View Profile
Timur Yalcin
Timur Yalcin

Lead Frontend Developer | Fullstack Developer

View Profile
Can Celebi
Can Celebi

Backend development, consulting

View Profile
Hicham Mokhtari
Hicham Mokhtari

Freelance Software Developer

View Profile
Thomas Jarnot
Thomas Jarnot

Backend Developer, DevOps Engineer

View Profile
Rodrigue Kelen-yo
Rodrigue Kelen-yo

Fullstack Development

View Profile
Robin Sadlo
Robin Sadlo

Senior Cloud & Backend Engineer

View Profile
Dirk Bolte
Dirk Bolte

Senior Software Developer

View Profile
Christopher Mäuer
Christopher Mäuer

Mobile & Full-Stack Engineer

View Profile
Michel Müller-landau
Michel Müller-landau

Senior Frontend Developer

View Profile
Fabian Deitelhoff
Fabian Deitelhoff

Volunteer Examiner for IT Apprenticeships

View Profile
Michael König
Michael König

Architect and Full-Stack Developer

View Profile
Hüseyin Korkut
Hüseyin Korkut

Senior Full-Stack Engineer

View Profile
Patrik Garten
Patrik Garten

Technical Lead Conversational AI

View Profile
Peter Achilles
Peter Achilles

IT Consultant

View Profile
Dirk Hesse
Dirk Hesse

Owner

View Profile
Carlos Medina
Carlos Medina

Migration Zend Framework 2 /Laminas

View Profile
Rüdiger Schulz
Rüdiger Schulz

Full-Stack Software Engineer / Consultant for Digitalization

View Profile
Gregor Staab
Gregor Staab

Backend Developer

View Profile
Daniel Stopp
Daniel Stopp

Frontend and Web Developer

View Profile
Yannis Vogel
Yannis Vogel

Tutor

View Profile
Christopher Groß
Christopher Groß

Fullstack Software Developer (Javascript / Typescript / Vue.js)

View Profile
Christian Worsch
Christian Worsch

Senior Full-Stack Developer

View Profile
Wadim Lupejcenko
Wadim Lupejcenko

Software Engineer & Consultant

View Profile
Thomas Ramm
Thomas Ramm

Architect, Developer

View Profile
Achille Chimi
Achille Chimi

Backend/Frontend Developer

View Profile
Thomas Stägemann
Thomas Stägemann

Rating System

View Profile