Senior Ruby Developer in sustainable mobility startup

Salary Competitive

At Donkey Republic we believe that sustainable mobility should be available to everyone. We do this by providing an affordable bike rental service across Europe in more than 70 cities. We work closely with cities and lawmakers to help transform cities into more liveable places.


What your job will be

Donkey Republic builds a wide range of software. You will join the product team which builds the software facing our riders (app and backend) as well as the fleet management and SaaS-platform mainly used by partners running a bike-share and corporates that offer their employees bikes for work.

You will join our existing skilled team of developers who are already in the product team and contribute to the direction of both the product and architecture.

Our software enables both Donkey Republic and a range of partners to run their bike fleets efficiently and we want to make sure that our platform stays competitive and world-class. You will take an equal part in solving all challenges big and small that we face.


Who you are

We expect you to have years of experience with building services using Ruby on Rails. You should be self-driven enough to drive the development forward, while also caring about the overall performance of the team. You are an experienced developer that wants to do more than just code, but also have an impact on the product design.

We cherish virtues like code reviews, consistency, and code conventions and have a big setup of tools to help lint and test our code in any way.

Here we would usually write a technical stack that we would want you to have experience with, but the truth is that we want you to be well structured in your code, take responsibility for what you do, and want to constantly improve your already great coding skills. And most of all, we want you to be motivated by working in a social team with the ambition to do the best they can.


Here are some of the technologies we work with:

  • Ruby on rails

  • PostgreSQL

  • Vue.js

  • RSpec

  • Heroku

  • MQTT

  • And much more


What we offer

A spot in the team of an inspiring international startup. A job where achieving our vision is as important as creating a bright future for each team member.

We enjoy mindful risk-taking, experimenting with features, getting things done fast, and seeing the results of our daily work out there in the real world, where we ultimately help people move easier and explore better - on two wheels.


The Donkey Squad


For more information or questions please contact us at juri@donkeyrepublic.com

Perks and benefits

This job comes with several perks and benefits

Flexible working hours
Flexible working hours

Free coffee / tea
Free coffee / tea

Near public transit
Near public transit

Social gatherings
Social gatherings

Free friday beers
Free friday beers

Central office
Central office

See all 15 benefits

Working at
Donkey Republic

Donkey Republic is a publicly listed micro-mobility company headquartered in Copenhagen. We operate bike-sharing systems across Northern Europe under long-term tender and concession contracts and licensed agreements with municipalities and transport authorities. In 2025 we recorded DKK 166M in revenue across a fleet of approximately 23,000 active bikes. With the award of two landmark contracts in Dusseldorf and the Ruhr region, our operational fleet will grow to 30,000+ bikes in 2026. Our strategy, 'Ride and Do Well', is built on the conviction that reliable, city-integrated bike sharing changes how people move. Delivering on that means winning the right contracts in the right cities across our focus markets of DACH, Benelux and the Nordics. Almost all of our growth comes through public procurement. The tender function is not a support function here; it is the commercial engine.

Read more about Donkey Republic

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