Working at QuantumBlack |

QuantumBlack Overview

London, England
201 to 500 employees
Company - Private
Unknown / Non-Applicable
QuantumBlack is a data science consultancy helping companies use data to drive decisions. We combine business experience, expertise in large-scale data analysis and visualization, and advanced software engineering know-how to deliver results.<br/><br/>We started life ... Read more

Mission: QuantumBlack is a data science consultancy helping companies use data to drive decisions. We combine business experience, expertise in large-scale data analysis and visualization, and advanced software engineering know-how to deliver results.<br/><br/>We started life ... Read more

Company Updates

  • On Thursday 16th July we are bringing together some of our Practitioners for a live panel discussion on QuantumBlack in the APAC region! We will discuss Machine Learning, our Data Science and Data Engineering roles and Diversity &amp; Inclusion. Details below including timezones and where to register. Looking forward to see you there! #machinelearning #ai #ml #dataengineering #datascience #apac

  • Don&#039;t forget to join us for our webinar on QuantumBlack Labs tomorrow at 12noon - 12:45p.m GMT // 7.00a.m - 7:45a.m EST! Hear from Rakhi, Yetu, Zain &amp; Tom!

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QuantumBlack – Why Work With Us?

Our guiding principles

We harness data, analytics and design to give organisations a clear path to improve performance.

We combine our skills and approach with McKinsey & Company’s knowledge and expertise to provide transformational impact by solving some of the toughest business problems.

At QuantumBlack you have the best of both worlds; all the benefits of being part of one of the leading management consultancies globally and the autonomy to thrive in a fast growth tech culture:

  • Real-World Impact – No project is ever the same; we work across multiple sectors, providing unique learning and development opportunities internationally.
  • Fusing Tech & Leadership – We work with the latest technologies and methodologies and offer first class learning programmes at all levels.
  • Multidisciplinary Teamwork - Our teams include data scientists, engineers, project managers, UX and visual designers who work collaboratively to enhance performance.
  • Innovative Work Culture – Creativity, insight and passion come from being balanced. We cultivate a modern work environment through an emphasis on wellness, insightful talks and training sessions.
  • Striving for Diversity – With colleagues from over 40 nationalities, we recognise the benefits of working with people from all walks of life.

Recent projects include: 

  • Healthcare Efficiency – We helped a healthcare provider improve their clinical trial practices by identifying congestion in diagnostic testing as a key indicator of admissions breaches.
  • Environmental Impact – We designed and built the first data-driven application for a state of the art centre of excellence in urban innovation by collecting real-time data from environmental sensors across London and deploying proprietary analytics to find unexpected patterns in air pollution.
  • Product Development – We worked with the CEO of an elite automotive organisation to reduce the 18-month car development timeframe by improving processes, designs and team structures.

Who you are

A core value at QuantumBlack is fusion and at the heart of our multi-disciplinary teams is the belief that the sum of individual parts will always be less than the impact of the entire team. We look for people who are highly collaborative and capable of laying aside their own agenda, listening to and learning from colleagues, challenging thoughtfully and prioritising impact. QuantumBlack colleagues believe in iterative change, experimenting with new approaches, learning and improving to move forward quickly. Trust between colleagues is paramount here – we seek individuals who can always be trusted to work in the best interests of all colleagues and are naturally enthusiastic.

Why work at QuantumBlack?

  • Real World Impact

No project is ever the same; we work across multiple sectors, providing unique learning and development opportunities internationally.

Our work draws on applying cutting edge research from academia and industry to real-life business opportunities.

Examples of our impact:

-Saving lives: Bringing potentially life saving drugs to market faster by helping a pharma company drastically decrease clinical trial times.
Keeping people connected: Improving telecoms networks up-time through predictive maintenance and optimisation.

  • Fusing Tech & Leadership

Apart from working with the latest technologies and methodologies, as part of McKinsey & Company we offer first class learning programmes at all levels. No other tech companies boast the development capabilities that we do being part of the McKinsey group.

We work on projects with clients from all over the world, allowing you to enhance your global network and exposure.

We work with you to achieve your professional goals providing the platform for deep specialists to become leaders in their field and in wider business.

Some of our industry keynote speeches include:

The Female Quotient at SXSW debating the future of AI and getting more women into STEM careers.

Mobile World Congress to discuss the future of AI and the impact on work.

Hosting a 300 person workshop at  Web Summit discussing Explainable AI.

  • Multidisciplinary Work Culture

Our teams include data scientists, engineers, project managers, UX and visual designers. You will be part of a specialist guild allowing you to hone your craft, whilst interacting regularly with practitioners from other fields in an agile environment.

Examples of this include data science coffee sessions – our weekly gatherings for data scientists with external speakers discussing recent leading papers – and a Tech Talk series. 

  • Flexible Career Tracks

Our growth alongside McKinsey means you will have the option of different career tracks. 

Whether you want to become a thought-leader in a specific technical field, a people leader or move to McKinsey career tracks, you can take advantage of the McKinsey global network to seek the opportunities you are looking for.

With offices in the UK, North and South America, Australia and India we provide global opportunities.

  • Innovative Work Culture

Delivering impactful transformations with our clients is not easy and we work hard. We also believe that creativity, insight and passion come from being balanced happy.

In addition to modern workplaces, we are health and wellness-focused; from yoga classes to sleep clinics and nutrition seminars, we promote a healthy work-life balance. We prioritise the highest quality of work, not the longest work weeks. 

We encourage our teams to work from their home office where possible to facilitate knowledge sharing.

  • Striving for Diversity

Everyone here recognises the benefits of working with people from different backgrounds. We are an inclusive company with colleagues from over 40 nationalities.

You can read more about why our group believes that diversity matters here. We encourage people from non-traditional academic backgrounds to apply.

Being at the forefront of the Data Science field and a McKinsey company, we have a responsibility to promote and embody a diverse community. We recognise we can always do more but we are proud to be part of McKinsey & Company - an award-winning organization for workplace diversity, supporting initiatives such as LeanIn.

  • Ethics & Trust

We are passionate to be applying machine learning and AI solutions, and we embrace the responsibility that comes with it

We drive discussions surrounding the economic impact of AI and its associated ethical questions, as you can read on our Medium blog.

Data is the lifeblood of any modern organisation, and trust is the currency of our engagements with clients.

We strive to maintain the highest levels of data handling, governance and information security with our clients. Nothing is more important to us.

Meet our colleagues



QuantumBlack Reviews

  • "A very exciting and inspiring place to work at"

    • Work/Life Balance
    • Culture & Values
    • Career Opportunities
    • Comp & Benefits
    • Senior Management
    Current Employee - Data Scientist in London, England
    Current Employee - Data Scientist in London, England
    Approves of CEO

    I have been working at QuantumBlack full-time (Less than a year)


    It gathers very smart people from different backgrounds and very enthusiastic about their work. Everyone is very nice and willing to help, and projects cover a wide range of different sectors. It is very gratifying to feel the impact of one's work and it is an excellent place to learn everyday.
    Its own culture and the great working environment is one of its biggest qualities of QB.


    It requires working long hours sometimes

See All 48 Reviews

QuantumBlack Photos

QuantumBlack photo of: London colleagues creativity!
QuantumBlack photo of: Chilling out at the Questival Manor Hours
QuantumBlack photo of: Questival setting
QuantumBlack photo of: Serious work session
QuantumBlack photo of: It's not all about work!
QuantumBlack photo of: Team bonding!
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QuantumBlack Interviews



Getting an Interview

Getting an Interview




  1. Featured Interview

    Helpful (5)  

    Data Engineer Interview

    Anonymous Employee
    Accepted Offer
    Positive Experience


    I applied in-person. The process took 5+ weeks. I interviewed at QuantumBlack in August 2019.


    Great overall experience! The recruiter is prompt and very accommodating, no ghosting around. Interviewers are smart and know their stuff well. All my interview results were received in less than a week.

    There are total 3 interviews:
    1) technical (coding) round - expect to bring your own laptop
    2) technical round - this round was focused more on your past projects and drilled deep into the technicalities
    3) behavioral round - interview with McK partner, why QB and what‘s your aspiration

    Interview Questions

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QuantumBlack Awards & Accolades

  • Best Consulting Firm To Work For In 2018, Vault, 2018
  • 2018 LinkedIn Top Companies in the UK, LinkedIn, 2018
  • The Times Top 50 Employers for Women, The Times, 2017
  • Best Places to Work 2018 for LGBTQ Equality, Human Rights Campaign Foundation, 2018
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