Senior Data Scientist I - QuantumBlack, AI by McKinsey in City of Westminster

You will lead the development of cutting-edge AI and machine learning solutions that tackle some of the most complex business challenges across industries—delivering measurable impact at scale. In this role, you will leverage the latest advances in deep learning, reinforcement learning, and AI to uncover insights and improve business performance. You will mentor other data scientists, shape the QuantumBlack, AI by McKinsey’s R&D roadmap, and identify high-potential machine learning initiatives for industry application.

Working closely with data engineers, machine learning engineers, and designers, you will build end-to-end analytics solutions that create real-world impact. Your work will transform industries. By leveraging advanced AI techniques and collaborating with industry leaders, you will help clients gain a competitive edge, solve critical challenges, and achieve lasting improvements in their operations.

You will be based in London and collaborate closely with data scientists, data engineers, machine learning engineers, designers, and product managers around the world. Together, you’ll work on interdisciplinary projects to solve complex business challenges across a range of industries. Collaborating with QuantumBlack, AI by McKinsey leadership, client executives, and technical experts, you will lead the development and application of cutting-edge machine learning and AI solutions to drive measurable business impact.

At McKinsey, you’ll thrive in an unparalleled environment for growth. You’ll work on high-impact projects, connect technology with business value, and collaborate with inspiring multidisciplinary teams, gaining a holistic perspective of AI’s transformative potential while advancing as a technologist and leader. Driving lasting impact and building long-term capabilities with our clients is not easy work. You are the kind of person who thrives in a high performance/high reward culture—doing hard things, picking yourself up when you stumble, and having the resilience to try another way forward.

In return for your drive, determination, and curiosity, we’ll provide the resources, mentorship, and opportunities you need to become a stronger leader faster than you ever thought possible. Your colleagues—at all levels—will invest deeply in your development, just as much as they invest in delivering exceptional results for clients.

Every day, you'll receive apprenticeship, coaching, and exposure that will accelerate your growth in ways you won’t find anywhere else. When you join us, you will have:

• Continuous learning: Our learning and apprenticeship culture, backed by structured programs, is all about helping you grow while creating an environment where feedback is clear, actionable, and focused on your development.
• A voice that matters: From day one, we value your ideas and contributions. You’ll make a tangible impact by offering innovative ideas and practical solutions, all while upholding our unwavering commitment to ethics and integrity.
• Global community: With colleagues across 65+ countries and over 100 different nationalities, our firm’s diversity fuels creativity and helps us come up with the best solutions for our clients.
• World-class benefits: On top of a competitive salary (based on your location, experience, and skills), we provide a comprehensive benefits package to enable holistic well-being for you and your family.

Bachelors, Masters or PhD level in a discipline, such as: computer science, machine learning, applied statistics, mathematics, engineering or artificial intelligence.

5+ years of deep technical experience in distributed computing, machine learning, and statistics related work. Programming experience in languages such as: Python, R, Scala, SQL. Proven application of advanced analytical, data science and statistical methods in the commercial world. Knowledge of distributed computing or NoSQL technologies is a bonus. Client-facing skills e.g. working in close-knit teams on topics such as data warehousing, machine learning.

Exceptional time management to meet your responsibilities in a complex and largely autonomous work environment. Demonstrated leadership (thought leadership or people leadership e.g. managed project teams or direct reports). Willingness to travel. Good presentation and communication skills, with a knack for explaining complex analytical concepts to people from other fields. Strong communication skills, both verbal and written, in English and local office language(s), with the ability to adjust your style to suit different perspectives and seniority levels.