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Centrica • United Kingdom

Principal Engineer (Design Systems & Experience Engineering)

Employment type:  Full time


A little flex time

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Job Description

We are Centrica! We’re so much more than an energy company. We’re a family of brands revolutionising a cleaner, greener future. Working here is #MoreThanACareer - we’re powered by purpose. Together we can make an impact that will truly change tomorrow. Whether you’re developing cutting-edge green tech, helping customers on the front line or simplifying operations behind the scenes.

Your work here isn’t just a job – it’s a mission. We all play a vital role in energising a greener, fairer future.

An opportunity to play your part – As the successfully appointed Principal Design Systems Engineer at Centrica, you will spearhead the engineering initiatives within our diverse and multi-faceted Nucleus team. Your position is instrumental in ensuring the robustness and advancement of our Design System.

You will be tasked with creating innovative, user-focused UI solutions, cultivating a cooperative atmosphere, and broadening the reach of the design system’s methodologies throughout Centrica. Your proficiency in vanilla JavaScript, web components using Lit, and design systems, coupled with a comprehensive understanding of contemporary frameworks, semantic HTML, CSS, and accessibility, will be vital. Additionally, you will oversee and mentor the product engineers, promoting a community-centric approach that appreciates contribution and involvement.

Location: UK (talk to us about flexible working)

The day to day –

  • Formulate innovative solutions to address customer UI issues.
  • Plan strategically to broaden the influence and application of the Nucleus Design System within Centrica. Foster a cooperative atmosphere across all fields.
  • Ensure the continuous growth and stability of the design system. Promote a community-oriented culture that is keen to participate and contribute.
  • Supervise and nurture the product engineers within the Nucleus team.

About you –

  • Specialises in Design Systems with an emphasis on long-term viability.
  • In-depth knowledge of vanilla JavaScript and web components using Lit.
  • Competence in creating and integrating with contemporary JavaScript frameworks.
  • Solid understanding of semantic HTML, accessibility, and modern CSS with PostCSS.
  • Acquaintance with Design Tokens and their usage.
  • Experience in crafting internal tools for prototyping and testing. Proficiency in Git, GitHub, and Kanban methodologies.
  • An effective leader capable of working across various disciplines.
  • A process architect who enhances team collaboration.
  • A forward-thinker who prioritizes customer-centric design decisions.
  • Diversity: Our team is diverse, amalgamating unique viewpoints and experiences.

What’s in it for you –

  • Competitive salary and bonus potential.
  • Company car allowance.
  • Employee Energy Allowance at 15% of the government price cap.
  • Pension scheme.
  • Company Funded Healthcare Plan.
  • 25 days holiday allowance, plus public holidays, and the option to buy up to 5 additional days.
  • Excellent range of flexible benefits, including technology vouchers, electric car lease scheme & travel insurance.

At Centrica we embrace diversity and actively seek to attract individuals with unique backgrounds and perspectives. To build a more sustainable future, we need the best team – a team with a diverse mix of people and skills, where everyone feels welcome and able to succeed. We are dedicated in helping to close the diversity gap and would love to see more females, people of colour and LGBTQ+ employees, as well as those from a variety of cultures and ethnicity to veterans and the differently abled. Supporting diversity and inclusion is a big part of who we are, we are not looking for people to fit into our culture but to add to it!

PLEASE APPLY ONLINE by hitting the 'Apply' button.

Applications will ONLY be accepted via the ‘Apply’ button.

This role is being handled by the Centrica recruitment team and NO agency contact is required.

Company benefits

Adoption leave
Open to part-time employees
Enhanced sick days
Flexible working week
Enhanced sick pay
Gym membership
Health insurance
Mental health platform access
Compassionate leave
Dental coverage
Fertility treatment leave
Season ticket loan
Buy or sell annual leave
Optional unpaid leave
Shared parental leave
Enhanced maternity leave
Carer’s leave
Enhanced paternity leave
Pregnancy loss leave
Cycle to work scheme
Pension match/increase
Equity packages
Life insurance
Annual pay rises
Share options
Financial coaching
Employee discounts
Volunteer days
Company car
Employees are very happy with their working location freedom
Employees are very happy with the flexibility in the hours they work
Employees are very happy with the benefits their company offers
Work-life balance
Employees feel that they can switch off quite easily from work
Role modelling
Employees feel that flexible working is part of the culture
Employees feel they have complete autonomy over getting their work done

Additional employee ratings
(these do not contribute to the FlexScore®)

Employees feel that the diversity is good and there are continued efforts to improve it
Employees feel like the company culture is brilliantly inclusive and equitable
Employees feel like it is a really great environment to work in
Employees feel very excited about and aligned with the company mission
Employees feel that their salary is good and matches the value they bring

Working at Centrica

Company employees


Gender diversity (male:female)


Office locations

Windsor, London, Cardiff, Leicester, Glasgow, Edinburgh, Manchester, Dublin, Stockport, Staines, Hampton, Aberdeen, Barrow, Hull

Hiring Countries




United Kingdom

Awards & Achievements

2nd – Large companies

2nd – Large companies

Flexa100 2024
3rd – Consumer Goods

3rd – Consumer Goods

Industry awards 2023

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