Principal Backend Engineer


Athens, Greece

We are Kaizen Gaming

Kaizen Gaming is the leading GameTech company in Greece and one of the fastest-growing in Europe, with the Stoiximan brand in Greece and Cyprus and Betano in Germany, Romania, Bulgaria, Czech Republic, Portugal, Brazil, Chile, Peru, Ecuador and Canada. Our aim is to leverage cutting-edge Technology in order to provide the optimum experience to those who trust us for their entertainment.

The Opportunity

Principal Backend Engineers hold a central role in the Technology department. They are expected to help teams devise elegant and performant solutions in response to real business problems, guide them in designing and implementing these solutions in code, as well as teach coding, testing, debugging, and performance analysis techniques, while also carrying out code reviews. Will frequently attend teams' scrum events (esp. refinements) and help teams' product owners shape a better understanding of the technical challenges involved. Production problems are usually escalated to Principal Engineer for triaging before landing in a team's backlog. Principal Engineers should also stay up to date on the latest technologies and drive their adoption.


Principal Backend Engineers across tribes cooperate with each other, aligning frequently among themselves and helping each other from designing new systems to filling in gaps in their business knowledge and everything in between. We strongly believe in coaching and being proactive. Principal Engineers will pair program with members of their teams, offering hands-on advice and addressing problems much sooner than code review time. We are proud of building an experienced and talented Principal Engineers team that everybody will be eager to join. But at the same time, we would like to make sure we engage kind and friendly personalities with leadership qualities, who can foster trust and personal growth among their peers.


At Kaizen, we operate in verticals, which represent the connection with our customers and the way that we are creating sustainable growth and seamless entertainment experiences. Each vertical (Sportsbook, Gaming, Account & Services, Rewards & Comms), as well as our core technology lines (Platform and International Expansion), consists of Technology and Product teams. Our Technology department is organized across tribes with each tribe focusing on a particular aspect of the business. Each tribe is led by their tribe-leader, who reports to the Vertical Director. Tribes are composed of teams and an architect may lead one or more of them. Principal Engineers, depending on the tribe, can report to Technology Managers or Tribe Leaders.

Tech stack

Our tech stack consists of many services and applications written in C#/.NET (both full framework and Core) for the backend stuff. We use jQuery/Knockout.js for some of the older apps and Angular or Vue.js for the newer frontend stuff. We use MSSQL server and PostgreSQL for most of our storage needs interspersed with Redis and ElasticSearch, whenever it makes sense to do so. RabbitMQ is the message broker ubiquitously used in our systems and we deploy using a mixture of regular good old VMs and Docker containers on our on-prem Openshift installation. We're using git and Gitlab for version control and our CI/CD pipeline.


Must have:

  • 7+ years of working as a software engineer at least some of which for high traffic websites;
  • Current and up-to-date software engineering skills;
  • Good people skills;
  • Team player; analytical thinker and problem solver; ability to self-organize;
  • Fast learner- you will need to get up to speed on business, people and teams, infrastructure and the technologies used as quickly as possible.

Nice to have:

  • Experience in coding in C#;
  • Familiarity with functional programming, distributed architectures and eventually consistent systems