Senior Kotlin Software Engineer - Schibsted Tech Polska
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Senior Kotlin Software Engineer



Feeling confident with your Kotlin skills? Eager to start working on a brand new project, with modern stack and architecture, where you can have a real impact?

Then we are definitely looking for you!


As part of the Ad Engineering unit, the Ads API is one of the teams responsible for development of the in-house advertising system, used by the internal sales organisation across Schibsted and offering direct booking of advertising campaigns to external customers. Our mission critical systems are accounting for around 150 million Euros in advertising revenue for the Schibsted group.

Our team is a key link between the booking systems and the adserver, delivering solutions such Booking, Inventory and Publisher APIs and providing support to other parts of the Schibsted’s ad ecosystem.

The team currently consists of 3 backend developers, based in Cracow, but we are looking for at least two more to join it. The development team is fully responsible for the product from the technical point of view, being able to decide on the architectural choices, libraries used and solutions built. We collaborate closely with other product and development teams within our business unit and with the ad-serving solution of choice – Xandr.


We are looking for an experienced backend software engineer, with at least 2 years of experience in Kotlin programming, preferably within the microservice ecosystem.
We search for someone confident with Kotlin and system design skills, willing to share knowledge and expertise with the rest of the team.

Our current stack is based on Scala, so it would be great if you are familiar working with that technology; it’s not a must though as we are just kicking off a large-scale brand new Kotlin-based project, which will be our main focus area for 2021.

As part of the Ads API team, you will be responsible for developing and maintaining Booking, Inventory and Publisher APIs, working closely with other engineering teams both within Schibsted and responsible for delivering 3rd party tools we use (p.ex. Xandr ad serving).

In your daily work, you will be mainly focused on coding – delivering on the new requested functionalities or services, but also spend quite some time on innovation – looking into new business opportunities, researching and building POC.

To become fully operational within your role and staying up to date, you will also have to check third-party documentation, support users, debug, maintain and operate the system as well as acquire knowledge from the ad-tech domain.

Once you learn the system, together with the rest of the team, you will continuously work on its technical evolution, scaling and simplification. We hope you will be able to take an active part in deciding how to implement new features and what architectural decisions to make.


  • In your current role, you are a seasoned backend software engineer working with Kotlin on a daily basis
  • You are well-versed in distributed systems based on microservices architecture, you are also familiar with event sourcing and DDD
  • You understand and cherish functional programming principles
  • You have experience working with most of those technologies: AWS, Kinesis/Kafka, AWS Lambda, Docker, Kubernetes
  • You are comfortable with relational and non-relational databases in general and PostgreSQL, DynamoDB in particular
  • You are willing to actively contribute to system design and architecture
  • You have at least professional working proficiency in English
  • Previous experience working with Scala is also a plus
  • It would be great if you have experience working with advertising products, ad-serving in particular
Contact person Ewelina Piłat

Our recruitment process - fully online!


Fill out the form and send us your CV - don't forget to mention all the things you are proud of! Once your CV is qualified for the next step of recruitment, you can expect contact from our recruiter.

Recruiter phone call

We are curious to get to know you and thus will ask you a few questions about your experience, motivation and expectations, as well as tell you more about Schibsted and our projects.

Programming task (optional)

Time to show off your practical skills during a home assignment - we don't want to stress you with onsite programming. Every solution is then carefully reviewed by our technical recruiters.

Technical interview

Now let's meet face-to-face and talk about your knowledge and skills - we'll start from reviewing your task and then move forward to more complex topics. Don't forget asking questions too!

Team fit interview

Have a chance to meet the Product or Engineering Manager you will be working with. During this step we'll focus mostly on soft topics - your work style, approach to software development and other.


Usually we need some time to summarise the process and then - yay, the offer is on the table! You have just received the opportunity to join one of our teams and work together with us :)

Our perks


Training budget

Fully flexible. Books, conferences, online courses, you name it.


Social package

Each month you receive benefit points transferrable to tickets, discounts or a prepaid card.


Four extra days off

We’re not minimalist. That’s why you get 4 days more than Polish law requires.



Sometimes you need to do your stuff without being at the office or start a day later thanks to flexible working hours.


Top-notch equipment

Most modern stuff with MacOs or Windows on board & mobile with either Android or iOS.


Home office supplement

Financial support to your home setup to make your WFH more enjoyable and healthy.


In-house trainings

Improve your business, tech & soft skills during working hours


Tech Jump

Mentoring program that helps you to learn completely new frameworks and programming languages.


Mental health support

A voucher for 3 online sessions with a professional therapist and a series of mental health oriented webinars.



Choose the level that suits you and pick up your favorite sports venues.


Medical care

With flexible plans tailored to you or your family.


Electric scooters

We do have our own electric scooters ready to be borrowed for the work commuting.

Life at Schibsted