The first banking platform for corporations and startups

Ruby, Elixir

solarisBank is a Berlin-based 200-person fintech company making waves at a pace rarely seen before in the financial industry.

It took solarisBank less than three years to build the platform, scale up a team, and raise almost €100m in funding rounds with Arvato, BBVA, Visa, Lakestar or ABN AMRO's Digital Impact Fund.

solarisBank's speciality: Banking-As-a-Platform, something that can be compared to Amazon’s AWS for digital banking. In a nutshell, you can build your own bank using different ‘bricks’ provided by solarisBank.

API: banking like Lego bricks

Partners gain access via APIs to solarisBank’s services, including:

  • payments and e-money,
  • lending,
  • bank accounts,
  • KYC services,
  • algorithmic scoring,

as well as services provided by integrated third party providers.

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solarisBank started from scratch and built a real banking platform. What are the lessons you’ve learnt over these two years as a CTO?

Peter Grosskopf, CTO of solarisBankOne of the crucial factors of our success was that we managed to find people who could take responsibility.

If you want to scale as a team and a company as a whole, you will only succeed when you divide work. If everybody's doing the same stuff, and decisions need to be taken only on the consensus, it's not cost- or time-effective.

Learn more: A Recipe for Banking Disruption? Lego Bricks and No Background in Finance. CTO of solarisBank Shares His Lessons

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You need to have teams with leaders that are eager to take the ownership. The same rule applies to any partners that solarisBank has collaborated with, including Netguru.

Peter Grosskopf
CTO at solarisBank
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Netguru as a solarisBank's partner – our collaboration

As the company has grown exponentially, solarisBank faced one of the most challenging tasks in any industry – keeping the pace of development up to the ambitions of a leading fintech company. This was the moment Netguru joined this exciting journey.  


  • helped solarisBank expand its API services;
  • assembled and introduced a well-oiled, standalone team to work on a platform for handling debit cards (Ruby);
  • strengthened the team responsible for the consumer loan products engine (Elixir).
How we mastered remote development

Not only did we help solarisBank's developers but also – as a trusted partner – we shared with the fintech rising star the best practices and processes we have developed during our 10 years of operation.

We supported solarisBank with our know-how: how to implement remote work, how to introduce effective communication on Slack, how to conduct project management, as well as other strategies needed to run teams scattered across the world.

Learn more about how we inspired our partners with our culture and processes. How Netguru Mastered Remote Development. Our Stories with a Fintech Leader, a Personal Robot, and a Project Management Tool.



I know from my experience that Netguru is used to working in remote settings, where your clients trust that you will try to build things the way they like to have it, even when you're not present in their offices. I’m happy to say that so far it has worked tremendously well for solarisBank.

Peter Grosskopf
CTO at solarisBank
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