Profilbild von Johannes Kettmann Fullstack Javascript (React | Apollo | Relay | Redux | GraphQL | Node | Express) aus Berlin

Johannes Kettmann

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Letztes Update: 06.09.2022

Fullstack Javascript (React | Apollo | Relay | Redux | GraphQL | Node | Express)

Firma: twelve Apps GmbH
Abschluss: Diplom Physik
Stunden-/Tagessatz: anzeigen
Sprachkenntnisse: deutsch (Muttersprache) | englisch (verhandlungssicher) | türkisch (gut)

Skills

React, Apollo, Redux, GraphQL, Node.js, Express, AWS, Auth0, GitHub Actions

Projekthistorie

01/2020 - bis jetzt
Founder
ooloo.io (Internet und Informationstechnologie, < 10 Mitarbeiter)

- Created a course for aspiring React developers to learn professional workflows in a simulated team environment
- Technologies: React, Gatsby, Serverless


03/2019 - 10/2019
Frontend JavaScript Developer
Osram Innovation Hub (Internet und Informationstechnologie, 50-250 Mitarbeiter)

- Frontend for IoT project lightelligence.io
- Technologies: React
- Responsibilities: Developing the frontend UI as a representation for the lightelligence API

08/2018 - 02/2019
Fullstack JavaScript Developer
HRS Innovation Hub (Internet und Informationstechnologie, 50-250 Mitarbeiter)

- Rewrite and modernization of the Hotel.de website
- Technologies: React, GraphQL, Node.js, AWS
- Responsibilities: Refactoring of legacy code, implementation of login and registration, planning and development of new pages, consulting on implementation of GraphQL API and client


09/2017 - 10/2018
Co-Founder & CTO
Petsnflats (Internet und Informationstechnologie, < 10 Mitarbeiter)

- Airbnb for pet owners: Implementation of a web platform
- Technologies: React, GraphQL, Node.js, AWS


06/2017 - 08/2018
Fullstack JavaScript Developer
Everestate (Internet und Informationstechnologie, 10-50 Mitarbeiter)

- Development of a real estate web platform
- Technologies: React, GraphQL, Node.js, AWS
- Responsibilities: Planing and development of components, GraphQL API, authentication system


01/2016 - 01/2018
Co-Founder & CTO
Evemp (Internet und Informationstechnologie, < 10 Mitarbeiter)

- Development of a web application for booking event locations and related services
- Technologies: React, GraphQL, Node.js, server-side-rendering, Docker container

10/2016 - 03/2017
Frontend JavaScript Developer
HQ-Plus (Internet und Informationstechnologie, 10-50 Mitarbeiter)

- Relaunch of HQ-Plus, an analytics tool for hotels
- Technologies: React, Redux
- Development of multiple pages including data intense graphs. Migration to a modern flux architecture using Redux, sagas and seamless-immutable.


09/2015 - 06/2016
Android Developer
dodenhof (Konsumgüter und Handel, 10-50 Mitarbeiter)

- Development of the Android app for dodenhof (owner of two shopping centers in northern Germany) in cooporation with nudge GmbH Hamburg
- Technologies: Java, RxJava, Retrofit, Butterknife/Dagger 2


12/2014 - 07/2015
Android Developer
BeHereNow Hamburg (Internet und Informationstechnologie, < 10 Mitarbeiter)

- Development of the Android app „BeHereNow Hamburg”
- Technologies: Java


01/2013 - 11/2014
Co-Founder & CTO
Smapper (Marketing, PR und Design, < 10 Mitarbeiter)

- Online platform for mobile online advertisement
- Technologies: Java, PHP, HTML, CSS, Javascript

Reisebereitschaft

Verfügbar in den Ländern Deutschland
Vollzeit Vor-Ort-Einsatz in Nähe Berlin
Einsätze mit überwiegendem Remote-Anteil in ganz Deutschland
Profilbild von Johannes Kettmann Fullstack Javascript (React | Apollo | Relay | Redux | GraphQL | Node | Express) aus Berlin Fullstack Javascript (React | Apollo | Relay | Redux | GraphQL | Node | Express)
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