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Backend Software Engineer (.NET

Job in 3090, Rotterdam, South Holland, Netherlands
Listing for: Rotterdam Innovation City
Full Time position
Listed on 2026-07-18
Job specializations:
  • Software Development
    Software Engineer, Cloud Engineer - Software, Backend Developer, Full Stack Developer
Salary/Wage Range or Industry Benchmark: 55000 - 75000 EUR Yearly EUR 55000.00 75000.00 YEAR
Job Description & How to Apply Below
Position: Backend Software Engineer (.NET)

Job description

Finally:
One app to book & use all shared mopeds, bikes, (e)-scooters, cars, taxi's & public transport in Europe! We are umob, your  for mobility. No more switching between apps in all different cities and countries.

With umob, we bring our users from A to B, worry free. Jump on one of the e-scooters at the corner of your street, hop on the train and take the taxi or public bike in Paris. A oui. It was never this easy! We are working on a livable future by building ‘the’ all-in-one mobility app, connecting all the current rental and mobility apps out there in one platform.

No more switching: easy, safe and efficient.

1 app, 1 verification. And 1 place to discover, book and pay. There is only 1 planet after all.

Shared mobility has been going through a major phase growth in the past few years, with different operators in purple, blue, green, yellow and red popping up in different cities. The good news is that it shows the drive to change cities and consumer behaviour, giving the streets back to our people and not to cars. In order to reduce C02 emissions and create more space in our environments, we need to travel different.

However, with all of these alternatives popping up, consumers end up having 30 different apps on their phone - all requiring a new verification and payment process. Not very convenient and not very sustainable. Et voilà, after months of building we have launched the umob app, offering direct access to over 30.000 vehicles with one account. You can now book all your favourite scooter providers, ring a taxi and buy your public transport ticket via one app.

With our internal tech team we're building towards 500.000 vehicles live end of year by fully integrating parties like Cooltra, felyx, Check, GO Sharing,Lime, Bolt & BIRD. With the acquisition of MaaS Global beginning of this year umob owns the longest history of data in Mobility as a Service and has the highest density in number of vehicles in Europe. That requires improving our software, scalability and performance of the app every single day.

Next to that, we continuously challenge ourselves to develop new and interesting features for our users to make sure we offer a better alternative than private cars.

The connecting DOTT. Some of our big why’s:

  • Strong and experienced founding team with Bibi Jorissen (CEO), Raymon Pouwels (CCO), Don van Arem (COO) & Ahmed Omar (CTO);

  • Make cities and countries more livable & sustainable;

  • Simplify and unify shared mobility across Europe; become #1 MAAS platform;

  • 1 app and 1 verification for the consumer to use shared mobility like (e-)bikes, e-scooters, cars, public transport, taxi and you name it'

  • Fast-paced learning and growth in an environment of autonomy and responsibility;

  • A prime spot in Rotterdam, easy to walk (or scooter) from Rotterdam Central Station!

Jump on board, ready to GO?
As a Software Engineer
engineer you will be responsible for:

  • Build new features to contribute to a seamless user experience.

  • Maintaining and improve our product to cater for European scale.

  • Solve interesting puzzels!

Job requirements

The connecting Dott. The right drive and experience:

  • Bachelor's or Master’s degree in Computer Science, Information Technology, or related field.

  • 5+ years of experience in a software engineering role including production-ready applications.

  • Strong (hands-on) experience in software development and application architecture.

  • Strong experience with C# .NET.

  • Experience with cloud computing (Azure/AWS), databases, CI/CD pipelines.

Nice to have:

  • Exposure to Domain-Driven Design (bounded contexts, aggregates, domain events).

  • Experience with event-driven systems (message brokers, outbox/inbox, schema evolution, idempotency).

  • Worked with modular monoliths, SOA, or microservices and understands the tradeoffs.

  • Prior experience with scaling systems and/or engineering teams.

Culture CHECK:

  • Feels at home in a young, fun, yet entrepreneurial management team in an early startup with big potential.

  • Sees building a scalable platform used by a million users worldwide as most exciting challenge, you’re not afraid to build a new wing on a flying plane.

  • Excellent communication, interpersonal skills. You’re…

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