Backend Engineer Intern (Ad Serving)

Ljubljana, SI

Celtra’s SaaS product is used to build and host the highest quality, data-driven video and interactive display ads for 2/3 of Fortune 500 brands. Our servers can handle 100k requests per second, many of which fan out to other services, internal and external. Any downtime costs our advertisers thousands of dollars per minute, and costs us even more in reputation. 

Your work matters! You will be responsible for:

  • Making life of Celtra developers easier when it comes to code reviewing.
  • Optimizing code reviewing process through providing increased transparency of information about tickets and pull requests.
  • Linking JIRA and Github together, utilizing their APIs and Webhooks

We expect:

  • Some programming skills, and understanding of what APIs are. 
  • You are truly interested in how things work and are always willing to dig deeper.
  • Good verbal and written English communication skills.
  • Willingness to constantly learn and improve.
  • Team players.

A bit about our stack:

  • MySQL, DynamoDB, S3 for persistent storage
  • Kinesis, enabling us to be event-driven
  • Programming language of choice is Scala since we need to achieve high concurrency levels (Akka framework is heavily used)
  • We consume both internal and external services (weather, location, audiences,...)
  • AWS and it’s services is backbone of our infrastructure

About Celtra  

Celtra is the Creative Management Platform for digital advertising. Brand and performance advertisers use our fully self-service platform to create, distribute and optimize the highest quality, data-driven ads at scale, across all channels and screens with great efficiency and control. We power the best video, native and rich media ads for 2/3 of Fortune 500 brands. 

Our culture:

  • We care about our product, company and its people.
  • We believe in high standards.
  • We take smart risks to achieve best results.
  • We believe in an open and proactive culture where employees are expected to learn and contribute outside of their core tasks.
  • We value personal growth more than previous experience. 

We take good care of our people. This is what we offer:

  • Great mentors and coworkers from whom you'll gain valuable insight in quality assurance processes and tools.
  • Work in our cosy offices in the very center of old Ljubljana, Slovenia.
  • A fridge that is always full and the best coffee in town.
  • Paid internship.

If you have an interest in a company who’s interested in both your wellness and your wallet, you should apply. Celtra is headquartered in Boston (MA), with offices in New York City, San Francisco, London (UK), Sydney (AU) and Ljubljana (SI). 

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