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Slice // pizza-ordering platform
Engineering, Full Time    Belfast, United Kingdom    Posted: Friday, March 12, 2021
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What is Slice?

Slice is the leading technology & marketing platform made exclusively for local pizzerias, making it super easy to order delicious, authentic local pizza anywhere, anytime. We serve the $45 billion U.S. pizzeria market in two ways: by providing a pizza-centric mobile & web ordering experience for consumers, & by empowering local restaurants with the technology, tools, & marketing to grow their business, while helping them compete with Big Pizza. Can you imagine what a small mom & pop pizza shop could achieve with the resources of Dominos?

Read more about our initiatives here

The Role

We are looking for a Principal Data Engineer to provide technical leadership to our growing team.  You will be responsible for expanding & optimising our data & data pipeline architecture, as well as optimising data flow & collection for cross-functional teams. The ideal candidate is an experienced data pipeline builder & data wrangler who enjoys optimising highly-available systems & building them from the ground up. You will support our software developers, business-intelligence & data scientists on data initiatives & will ensure optimal data delivery. The right candidate will be excited by the prospect of optimising or building new components for our companys data architecture to support our next generation of products & data initiatives. We believe in innovating to ensure great data quality & require tested automation of our pipelines.

What you'll do:

  • Create & maintain optimal data pipeline architecture.
  • Embrace, enhance & drive the overall data strategy for the company.
  • Assemble large, complex data sets that meet functional / non-functional business requirements.
  • Act as a multiplier by building systems, authoring tools, or introducing policies or patterns that raise the level of productivity of the entire Data organisation.
  • Build & support the infrastructure required for optimal extraction, transformation, & loading of data from a wide variety of data sources using scalable big data technologies.
  • Build analytics datasets that utilise our pipelines to provide actionable insights into customer acquisition, operational efficiency & other key business performance metrics.
  • Effectively design & deliver large, complex projects & distributed systems, potentially spanning multiple quarters with iterative delivery.
  • Work with stakeholders including the Executive, Product, Data & DevOps teams to assist with data-related technical issues & support their data infrastructure needs.
  • Keep our data separated & secure.
  • Create data tools & products for analytics & data scientist team members which assist them in building & optimising our product into an innovative industry leader.
  • Troubleshoot the most complex problems that may occur in the platform.

Essential Criteria:

  • Experience with Apache Spark 2.x or 3.x, ideally running within Databricks.
  • Advanced working SQL knowledge & experience working with relational databases, query authoring (SQL) as well as working familiarity with a variety of databases.
  • Strong programming skills in Java, Scala or Python using Spark or similar technologies.
  • Experience building & optimising big data data pipelines, architectures & data sets.
  • Experience performing root cause analysis on internal & external data & processes to answer specific business questions & identify opportunities for improvement.
  • Demonstrable ability to work with cloud based data technologies.
  • Strong analytic skills related to working with unstructured datasets.
  • Experience of building processes to support scalable data transformation & data structures.
  • A successful history of manipulating, processing & extracting value from large disconnected datasets.
  • Working knowledge of message queuing, stream processing, & highly scalable big data data stores.
  • Strong project management & organisational skills.
  • Track record of successfully leading complex engineering projects & mentoring junior engineers.
  • Experience supporting & working with cross-functional teams & external stakeholders in a dynamic environment.
  • We are looking for a candidate with 7+ years of experience in a Data Engineer role.

 Desirable Criteria

  • Experience writing non-trivial Scala code
  • Experience with AWS (what we use) or other cloud based platforms, with a desire to learn AWS.
  • Knowledge of building processes to support effective data governance / SOC2 compliance.
  • Experience with Spark & Kafka would be particularly beneficial.


We operate like a startup, so being self-motivated, curious, & flexible is a good start. You prefer to come up with your own solutions to problems but are not afraid to ask for help. You enjoy making suggestions for how to improve our product & business, no matter the department. Youre the kind of person who roots for the underdog. And lastly, this job will probably be a lot easier if you have a soulmate-level love for authentic pizza.

Why Slice?

Join a community of engineers who combine creativity, curious minds & a commitment to excellence with the desire & commitment to grow & build on the engineering skill base & community here in Northern Ireland, therefore we do not hire remote engineers. Missing a few of the criteria but have worked in a pizza shop, or feel you can solve some of our interesting problems? Why not get in touch!


  • Market Leading Salary
  • Strong Pension contribution
  • Personal Health, Dental & Eye Care
  • Income & Death insurance
  • Cycle Scheme of up to 2500
  • 750 per annum self-learning budget/working from home allowance
  • Health & wellbeing benefits
  • Market leading Maternity & Paternity Schemes
  • Flexible working / Hours & WFH
  • Generous time off allowance & policies
  • Free Friday Pizza & Monday Breakfast
  • Fully stocked kitchen/snacks
  • Annual conference attendance & training/development budget
  • Substantial gym membership discount
  • Discounts for local Pizzerias

How to apply?

A CV gives us a good idea of your background, we are interested in your latest work & projects. Education is great to see, but it's not overly important to us. If you have them, be sure to include links to any personal projects, blogs, contributions, or anything you want to add to your application.

My Pizza Slice is an equal opportunities employer & we value Diversity. We appreciate the differences in style & perspective as we believe it adds value to the organisation, & we aim to recruit likeminded employees. We are also proud members of the Diversity Mark NI initiative as a Bronze Member.

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