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Backend Developer in Amsterdam


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Job Description

Due to growth of Massarius we are looking for an analytical and eager Back-End Developer to grow and maintain our BigQuery database implementation where we aggregate, analyse and distribute advertising data, using Python, SQL, APIs and explore Machine learning (ML) opportunities.


About Massarius

Massarius is a Publisher Trading Desk. We help Publishers (owners of websites and apps) to sell their advertising space on their website. This space is sold through an programmatic auction, where an advertiser can bid on the available advertising space, and the highest bidding advertiser wins the adspace, also known as Programmatic Trading. Want to read more about what Programmatic Advertsing is? Read this article:

Massarius was founded in 2012, is growing 30%-40% YoY and we pop-up in many Fast Growing lists like FD Gazellen, Financial Times, NL Top 250! The offices in the center of Amsterdam and Madrid have 15 employees. Clients are Dutch and Spanish news and commerce sites., Pathé,, DeSpeld, AjaxShowtime, AT5, Periodista Digital, El Espanol and Delivery Media.

Your role as Back-End Developer

Apart from optimising the ad stack of our publishers, our activities include Business Intelligence (BI) and Dashboard. We collect website advertising Supply Side Platform (SSP) data and aggregate this into a wide range of BI and Analytics dashboards. For these automated processes we use Python. Our dashboard includes advertiser data, advertiser verticals, revenue data and placement data.

We are looking for a junior or medior Back-End Developer to maintain and further develop the Back-End. You will be on-boarded and trained by a senior developer, to take over his responsibilities.

Our ideal Back-End developer

Our ideal candidate has a university level of work and thinking with 1 to 2 years of relevant work experience, with at least sevens for science subjects. You are a curious, critical self-starter with experience in:

  • Python;
  • Workflows (computational);
  • Desire to learn and explore;
  • Storage and computing API's (unification of resources);
  • Databases (SQL, Google BigQuery/Amazon Redshift);
  • Introvert or extrovert doesn’t matter: you are clear in your written communication.

Currently there are no positions for applicants without EU passport.

What does Massarius offer you?

Massarius offers you a market-based salary and very different responsibilities. The learning curve you go through is requested and supported by very experienced professionals. The working atmosphere is characterized as open, direct, involved and result-oriented in a nice and informal work environment.

You will be able to see the fruit of your work directly because you can commit to production when you want.

You will be on-boarded and trained by a senior developer, to take over this part of his responsibility.

Interested in sharing your talent with us?

Send your CV with motivation to Bert Jan ten Kate:, call: +31 20 2603020 or apply here:

We're looking forward to meeting you!


About Massarius

  • Fintech

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