Senior ETL Developer

I’m interested


Krakow - Grand Parade

Contract type


Job description


We bet we can be a great match


When we say cutting edge, we actually mean it. Our Datawarehouse holds 21 terabytes, and we upload 25 gigabytes of data a day.  Here, you can work on work on highly reliable systems with low latency, much like the transactional systems of the best financial institutions, but… with fun included.


About us


Working with us you’ll be at heart of the technological revolution of one the world’s most trusted betting and gaming companies. We deal with projects ranging from widgets, desktop or mobile casinos and betting sites… just to name a few. We process 500 online Sportsbook bets per second each Saturday, that’s the same as orders processed by Amazon UK, on its busiest day of the year. We deal with more than 20 million users daily. Impressed? You can be sure there are many more challenges waiting for you.


Your role in the team

As a Senior Data Integration Developer, you'll be a mentor to a team, and you’ll develop on a Microsoft SQL 2016 technology platform. You’ll handle large volumes of data and integrate our platform with a range of internal and external systems. If you’re anything like us you’ll be interested in new tech and how it can be applied to data management. Our internal customer base is growing all the time, and we’re establishing ourselves as a true enterprise team using the latest technologies to make sure all customers get the best possible service. Our Data Scientists will consume the data you prepare, and will use the data to model machine learning algorithms.

You’ll join an agile team working alongside business analysts, testers, architects and project managers. Focusing mainly on the development of complex logic integrations; you’ll pay equal attention to the quality of documentation, code, and business logic and non-functional. NFRs are a priority, so aspects like maintainable code, supportability, restorability, monitoring and performance need to be integral to any delivery.

You'll need to support out of hours on a rota basis, when you're up to speed and confident in your role.


Skills needed


  • You have experience mentoring other developers
  • You have delivered successful projects, but also have experienced project failures, and have learned from the experience
  • You’re a strong ETL developer, and you’ve used SQL Server to handle large data sets and complex data transformations.
  • You’re an expert in data management and data quality.
  • It’s essential that you’ve got experience of the full SDLC in an ETL environment.
  • T-SQL is our main tech, so you need to be a whizz.
  • You’ve gained experience of enterprise data warehousing and DQ / RDM /MDS / MDM.
  • You’ve got effective data integration coding / UT skills using Microsoft SSIS 2012 or above, plus at least one other language (Java or C#.)



What we offer

  • Development opportunities, including IT conferences, internal training, lunch and    learn sessions and an individual development budget.
  • Complex work and the chance to make an impact.
  • Some opportunities for International travel to our offices in London, Leeds and Gibraltar (our office is 5 minutes away from the beach).
  • A great working atmosphere in a collaborative team of amazing people, with forward thinking managers.
  • Competitive salary and benefits fully paid private healthcare, multisport pass, daily fruit, and employee referral program.
  • Flexible working practices
  • And some fun in the office – integration events and company parties, internal football league, gamification initiatives, FIFA, board games, company competitions with cool prizes.


William Hill in Krakow


Our office sits on Kotlarska and our brilliant building has a range of different workspaces, hangouts and breakout areas to suit your every need. Situated in the centre of Krakow next to Vistula river – we're in the heart of one of the world’s most iconic cities. There are parks everywhere, you can enjoy a walk along Planty, or go to Kościuszko Mound to admire the city from above. With plenty of culture on your doorstep, you’ll be spoilt for choice. In fact, why not have a sneak peek around our office with Street View and see if you can picture yourself here