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Principal Data Engineer (Customer Data)

Date:  23-Jul-2022
Company:  DWR Cymru Cyfyngedig Welsh Water Plc
City:  Cardiff

Cardiff, Wales, GB, CF3 0LT

Job Requisition Number                              3122                                                                              
Work Type Permanent
Job Function Data / Knowledge Management
Salary Range

£44,494.00 -£52,279.00 

+ annual salary uplift
+ annual cost of living increase + bonus


Closing Date

South East Hub Cardiff/ Home working
There is no set closing date for this role. We will review applications on a weekly basis. We request that you kindly submit your application ASAP as we will offer immediately after we have achieved an interview shortlist.


Who we are


Our careers website
Meet our people video


Dŵr Cymru Welsh Water keep 3 million people healthy each day with safe, reliable water, and take away wastewater to clean, before returning it safely to our beautiful rivers and seas.

To be able to deliver high quality, essential services which help to protect the health of our customers, colleagues and our environment, we need the right people to deliver on our vision.  This is achieved by living our core values and demonstrating the core behaviours that underpin them.  The security of our people, assets and information is key to us, so we are looking for people who understand and comply with the company’s required security objectives.

We know that the most successful teams are the most diverse teams. Equality, diversity and inclusion provide the very foundation to our culture at Welsh Water. We want every individual to feel confident, proud and able to bring their whole selves to work. 

To ensure an improved representation in our workforce, applications are particularly welcome from minority groups including Black, Asian and Minority Ethnic people, Females, LGBT+, Non-binary and people with disabilities. Together we continue to build a workplace that not only celebrates the diverse voices of our colleagues but also represents each customer we serve.

In essence, ours is a company based on trust, openness, respect, commitment and honesty. A company that our colleagues are proud to work for.

What you’ll be responsible for


This is a new and exciting role that will allow you to play a leading role in developing our new cloud-based data platform.   You will be leading on the technical data engineering development on the new platform, whilst also supporting our existing set of SQL Servers, that are predominantly used to feed data into a number of analytics products produced by the Data Team to help the business with data-led decision making.

Your responsibilities will include

1.        Line managing a small team of database developers and data engineers, supporting newer members of the team (particularly graduates and apprentices) to develop their own understanding
2.        Managing and participating in the design and implementation of data engineering projects on both on-premise and cloud based data stacks, delivering efficient solutions that comply with architectural and data security requirements, on time
3.        Working closely with the Data Governance and Engineering Manager to ensure relevant strategic objectives (e.g., utilisation of the cloud data platform etc.) successfully progress
4.        Being able to work collaboratively as part of a team, whilst also being trusted to work individually where necessary.  Approaching collaborative projects with others in a positive manner to problem-solve, and identify viable solutions to overcome issues and challenges
5.        Working closely with technical and management colleagues within key teams such as Integrated Technology Services (ITS) – to ensure relevant information technology components and services are in place to accommodate developed solutions
6.        Actively horizon-scan across a rapidly changing field, assessing how the latest research, techniques and approaches could be implemented to achieve business benefit
7.        Undertaking any other duties as required to meet the needs of the business.



Who you’ll work with

•    Data Team 
•    Integrated Technology Services (ITS) e.g. Architecture, InfoSec
•    Third party partners such as Infosys
•    Stakeholders across our retail, operational and support functions

About you



  • Relevant undergraduate degree (BSc) in computer science, mathematics or related discipline, relevant long term experience or MCSA/MTA certification



  • Strong level of demonstrable experience in any of the following or related fields: database management, data architecture, data platform management
  • Strong level of demonstrable experience using cloud-based data stack (e.g. Azure, AWS, GCP)


Knowledge & Skills

Top three - 

  • Substantial, demonstrable experience of data pipeline design and management
  • Solid understanding of database administration activities and principles
  • Strong understanding of typical ingestion patterns (e.g. ETL, ELT) and their effective implementation with on-premise and cloud-based environments


Other knowledge & skills

  • Enthusiastic about putting our customers first every day
  • Demonstrable experience of the full software/reporting lifecycle from planning and design through to deployment and maintenance
  • Strong understanding of DevOps (or other source control technologies) – particularly code repositories and version control, containerisation methodologies, and application deployment practices (CI/CD pipelines)
  • Knowledge of typical data modelling approaches (e.g. Kimball) and experience of working with and building data warehouses
  • Data transformation approaches
  • Python and SQL programming capabilities


Desirable (should not deter you from applying)

  • Data security approaches – e.g. permission models (AD, role-based etc.) and techniques to protect data in certain circumstances (e.g. encryption, masking) - Desirable only
  • Experience using the Microsoft data stack (especially Azure Data Lake, Azure Synapse, Azure Data Factory) - Desirable only
  • Knowledge of the Microsoft BI Stack, including SQL Server Analysis Services, Integration Services and Reporting Services, and Power BI - Desirable only
  • Experience using common agile project management principles, particularly in the context of data and analytical project delivery - Desirable only

Good to know


For an informal discussion about this role, please contact:

Location is currently full time UK home working with a view to move into a hybrid model at some point in 2022 (this can be flexible and negotiated).

Interviews will take place virtually.



As well as a market competitive salary, 33 days  annual leave (pro rata, including public holidays), we offer a range of employee benefits and rewards including:

•    Variable pay schemes (your salary will always stay the same, but depending on the performance of the company you could receive a yearly bonus)
•    Enhanced employer pension contributions – Up to 11%
•    Enhanced family friendly policies
•    Progression opportunities, including the ability to apply for funded training and coaching and mentoring programmes
•    Reduction on gym memberships and high street shopping
•    Cycle to work scheme
•    Car-leasing scheme
•    Health CashBack scheme
•    An employee assistance programme for employees and their immediate family

Whilst also working for a not-for profit company that truly cares about earning the trust of customers everyday, and about looking after our beautiful environment.





Dŵr Cymru Cyf, a limited company registered in Wales No. 2366777. Registered office: Linea, Fortran Road, St. Mellons, Cardiff CF3 0LT

© Dŵr Cymru Cyf 2019.

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