Recommended expert

René Fürstenberg

Freelance Software Developer

René Fürstenberg
Eisenach, Germany

Experience

Jan 2022 - Dec 2023
2 years
Hamburg, Germany

Freelance Software Developer

Njiuko GmbH

  • Git
  • PostgreSQL
  • REST-APIs
  • RSpec
  • Ruby on Rails
  • Pair programming
  • Jira
  • Teamwork
  • Slack
  • Backend
  • Docker
  • Kubernetes
  • Hubspot API
Jan 2022 - Dec 2022
1 year
Chicago, United States

Freelance Software Developer

Combinaut, Inc.

  • English
  • CSS
  • HTML
  • JavaScript
  • MySQL
  • RSpec
  • Ruby on Rails
  • Health care
  • Backend
  • Customer relationship management
Jan 2021 - Dec 2021
1 year
Hamburg, Germany

Freelance Software Developer

Analyse & Konzepte immo.analytics GmbH

  • JavaScript
  • PostgreSQL
  • Ruby on Rails
  • Fullstack
  • Real estate
Jan 2021 - Dec 2021
1 year
Berlin, Germany

Freelance Software Developer

Cocoli GmbH

  • English
  • PostgreSQL
  • REST-APIs
  • Ruby
  • Ruby on Rails
  • Sass
  • Stimulus.js
  • Test driven development
  • Furniture marketplace
  • Fullstack
  • Stripe payments API
  • Shop system
Jan 2021 - Dec 2021
1 year
Berlin, Germany

Freelance Software Developer

Match-patch

  • MySQL
  • REST-APIs
  • Ruby on Rails
  • Backend
  • Stripe payments API
  • Dating
Jan 2020 - Dec 2020
1 year
Hamburg, Germany

Freelance Software Developer

New Work SE (Xing)

  • MySQL
  • REST-APIs
  • Ruby on Rails
  • Backend
  • Community
  • AMQP
  • Payments
Jan 2020 - Dec 2020
1 year
Berlin, Germany

Freelance Software Developer

Zalando Marketing Services

  • English
  • PostgreSQL
  • Ruby on Rails
  • Fullstack
  • E-commerce
  • Backend / Frontend
Jan 2019 - Dec 2019
1 year

Freelance Software Developer

Whitebox GmbH

  • PostgreSQL
  • RSpec
  • Ruby
  • Ruby on Rails
  • Test driven development
  • Unit tests
  • Backend / Frontend
  • Robo advisor
Jan 2018 - Dec 2019
2 years
Berlin, Germany

Freelance Software Developer

mobileJobs GmbH

  • Git
  • HAML
  • JavaScript
  • MySQL
  • RSpec
  • Ruby
  • Ruby on Rails
  • Sass
  • Scrum
  • GitHub
  • Backend
  • Job-portal
Jan 2017 - Dec 2018
2 years
Hamburg, Germany

Freelance Software Developer

Xing AG

  • JavaScript
  • MySQL
  • REST-APIs
  • RSpec
  • Ruby on Rails
  • Teamwork
  • Backend
  • Fullstack
  • Community
  • AMQP
  • Importer
Jan 2016 - Dec 2017
2 years

Freelance Software Developer

Sonnen GmbH

  • MySQL
  • REST-APIs
  • Ruby on Rails
  • Backend
  • Renewable energy
  • Salesforce
Jan 2016 - Dec 2016
1 year
Berlin, Germany

Freelance Software Developer

sofatutor GmbH

  • Backbone.js
  • Coffeescript
  • JavaScript
  • jQuery
  • MySQL
  • Ruby on Rails
  • Learning platform
Jan 2013 - Dec 2016
4 years
Berlin, Germany

Freelance Software Developer

Zattoo

  • English
  • Backbone.js
  • Coffeescript
  • Git
  • HAML
  • JavaScript
  • jQuery
  • Marionette.js
  • MySQL
  • REST-APIs
  • RSpec
  • Ruby
  • Ruby on Rails
  • Sass
  • Twitter Bootstrap
  • Pair programming
  • Test driven development
  • Content management systems
  • Unit tests
  • Teamwork
  • GitHub
  • Fullstack
  • Backend / Frontend
  • Set-top-box
  • Elasticsearch
  • Importer
Jan 2012 - Dec 2019
8 years
Berlin, Germany

Freelance Software Developer

Xaa-Systems

  • Git
  • MongoDB
  • MySQL
  • NoSQL
  • REST-APIs
  • Ruby on Rails
  • GitHub
  • Content management system
  • Importer
Jan 2009 - Dec 2013
5 years
Berlin, Germany

Freelance Software Developer

Viacom - Nickelodeon - Viva - MTV Networks

  • German (native)
  • English
  • Backbone.js
  • Coffeescript
  • CouchDB
  • CSS
  • Facebook-APIs
  • Git
  • Google-APIs
  • HAML
  • JavaScript
  • jQuery
  • MongoDB
  • MySQL
  • NoSQL
  • REST-APIs
  • RSpec
  • Ruby
  • Ruby on Rails
  • Sass
  • Twitter-APIs
  • Pair programming
  • Test driven development
  • Jira
  • Unit tests
  • Teamwork
  • GitHub
  • Backend
  • Fullstack
  • Backend / Frontend
  • Content management system
  • Elasticsearch
  • Importer
  • Microsites
  • Authentication plugins
  • Microservices
  • Website
Jan 2008 - Dec 2018
11 years
Berlin, Germany

Freelance Software Developer

Motorradfreunde.com

  • Coffeescript
  • Marionette.js
  • REST-APIs
  • Ruby on Rails
  • Community
Jan 2008 - Dec 2009
2 years
Berlin, Germany

Freelance Software Developer

Moviepilot

  • Git
  • HAML
  • HTML
  • MySQL
  • RSpec
  • Ruby
  • Ruby on Rails
  • Sass
  • Pair programming
  • Scrum
  • Test driven development
  • Unit tests
  • Teamwork
  • GitHub
  • Community
Jan 2003 - Dec 2003
1 year
Berlin, Germany

Freelance Software Developer

KaDeWe - Feinschmecker-Etage

  • CSS
  • HTML
  • MySQL
  • Content management system
  • Shop system
  • PHP
Jan 2002 - Dec 2003
2 years
Berlin, Germany

Freelance Software Developer

arun - Werbung

  • Website
  • PHP
  • Flash

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 Information Technology (12 years), Automotive (11 years), Media and Entertainment (9 years), Retail (3 years), Energy (2 years), and Advertising (2 years).

Information Technology
Automotive
Media and Entertainment
Retail
Energy
Advertising

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 (18 years), Product Development (15 years), and Customer Service (1 year).

Information Technology
Product Development
Customer Service

Summary

I'm a freelance software developer since 2002 and work as backend, frontend or full stack developer for craftsmen, medium sized companies, startups or corporations. If you need support for your existing team, want to implement an idea or just need some advice about software development, just give me a call.

Skills

  • Apache
  • Backbone.js
  • Coffeescript
  • Couchdb
  • Css
  • Cucumber
  • Facebook-apis
  • Git
  • Google-apis
  • Haml
  • Html
  • Real-estate–apis
  • Javascript
  • Jquery
  • Marionette.js
  • Mongodb
  • Mysql
  • Nosql
  • Postgresql
  • Rest-apis
  • Rspec
  • Ruby
  • Ruby On Rails
  • Sass
  • Stimulus.js
  • Twitter Bootstrap
  • Twitter-apis
  • Amqp
  • Willingness To Travel
  • Teamwork
  • Linux
  • Github
  • Mac Os X
  • Atom.io
  • Slack

Languages

German
Native
English
Elementary

Profile

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Frequently asked questions

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

Where is René based?

René is based in Eisenach, Germany.

What languages does René speak?

René speaks the following languages: German (Native), English (Elementary).

How many years of experience does René have?

René has at least 18 years of experience. During this time, René has worked in at least 1 role and for 19 different companies. The average length of individual experience is 1 year and 11 months. Note that René may not have shared all experience and actually has more experience.

What roles would René be best suited for?

Based on recent experience, René would be well-suited for roles such as: Freelance Software Developer.

What is René's latest experience?

René's most recent position is Freelance Software Developer at Njiuko GmbH.

What companies has René worked for in recent years?

In recent years, René has worked for Njiuko GmbH, Combinaut, Inc., Analyse & Konzepte immo.analytics GmbH, Cocoli GmbH, and Match-patch.

Which industries is René most experienced in?

René is most experienced in industries like Information Technology (IT), Automotive, Media, and Entertainment and Publishing. René also has some experience in Retail, Energy, and Advertising.

Which business areas is René most experienced in?

René is most experienced in business areas like Information Technology (IT), Product Development, and Customer Service.

Which industries has René worked in recently?

René has recently worked in industries like Information Technology (IT), Healthcare, and Real Estate.

Which business areas has René worked in recently?

René has recently worked in business areas like Information Technology (IT), Customer Service, and Product Development.

What is the availability of René?

René is immediately available for suitable projects.

What is the rate of René?

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

How to hire René?

To hire René, click the Meet button on the profile to request a meeting and discuss your project needs.

Average rates for similar positions

Rates are based on recent contracts and do not include FRATCH margin.

1200
900
600
300
Market avg: 860-1020 €
The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.
Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.