Backend Engineer

Location: Vienna

Remote: We are big fans of flexibility, likewise we treasure the creativity time around the coffee machine, so relocating to Vienna is important to us

Values:   Project combating climate change, GHG emission assessment, reforestation & renewable energy 

Salary: Competitive

What we do and believe


Ollie is a platform that empowers people to manage and offset their personal footprint.

We help individuals take sustainable decisions on a daily basis, so everyone can contribute in the combat against climate change. Energy is a broad term, it doesn’t only cover household energy (electricity and gas), it includes your mobility footprint, your meat consumption or the waste you produce. We want to help people manage their footprint holistically through data and technology. 

Our belief is that the personal footprint will gain in importance. Companies can offset their employees’ footprint (> with Ollie Energy), or banks can tie their loan conditions to your footprint score (> with Ollie Energy). 


We just closed a seven-digit seed round, our headquarters are in Vienna. We are looking for fun, talented and experienced people who want to join us. We will use technology to combat environmental challenges. 


The company is founded by successful serial-entrepreneurs and renowned investors. We are backed by angels, who founded unicorn companies and are in it for the long run.




We are looking for a senior full-stack engineer who will take on the application architecture and the development challenges required to build our MVP. We will be working with fine-grained service architecture and deploy on the AWS cloud.  

The Ollie tech team aims for a high degree of automation, professional quality checks and fast releases. There will be several integrations with 3rd party providers both on the client and backend side. 



  • Design, build and maintain efficient, reusable, and reliable code

  • Participate in the direction of application architecture

  • Integration of data storage solutions like relational and nosql, databases. 

  • Integration of user-facing elements developed by front-end developers with server-side logic

  • Delivering items of a customer-facing app

  • Identify bottlenecks and bugs and devise solutions to these problems

  • Help maintain code quality, organization and automatization

  • Work in an agile environment with cross-disciplinary teams to deliver value



  • Experience with modern application and test frameworks

  • Good understanding of the syntax of Python and its nuances

  • Solid understanding of object-oriented programming

  • Basic understanding of front-end technologies, such as JavaScript, HTML5, and CSS3

  • Familiarity with concepts of MVC, Mocking, ORM, and RESTful

  • A knack for writing clean, readable code

  • Understanding of fundamental design principles behind a scalable application

  • Able to create database schemas that represent and support business processes

  • Able to implement automated testing platforms and unit tests

  • Proficient understanding of code versioning tools ( GIT )

  • Familiarity with development aiding tools ex. bundler, rake

  • Familiarity with continuous integration

  • Experience working with cloud automation would be benefit

  • Familiarity with virtualisation like docker and/or kubernetes is a benefit

To apply send your CV to

Be smart with emissions data.


1070 Wien

Burggasse 24 / 10


+43 664 515 6627


We are hiring. Apply now.

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