Software Engineer - QuantumBlack, AI by McKinsey in City of Westminster

Do you want to do work that matters, alongside supportive leaders who will help you grow faster than you ever thought possible? Are you a creative problem‑solver who is energized by challenges? You’ve come to the right place.

YOUR IMPACT

As a Software Engineer, you will collaborate with a global network of technologists, designers, and strategists to help clients transform their businesses through innovative digital solutions. In this hands‑on role, you’ll develop cutting‑edge products, mentor client teams, and shape engineering cultures while growing your expertise across diverse industries and technologies. In this role, you will work hands‑on with clients across industries to bring their digital ambitions to life. You will develop software products and services from the ground up while coaching and mentoring client teams on engineering best practices, user‑centric design, and Agile values. By co‑creating with clients and their leadership, you’ll help build not only cutting‑edge products but also the technical capabilities and cultures needed to sustain them. Your work will drive meaningful change for clients and their industries. You will participate in cross‑functional problem‑solving sessions with client leaders, shape their digital strategies, and deliver solutions that go beyond the product itself. Your efforts will help clients build scalable teams and engineering cultures that enable long‑term success. You will collaborate with clients across industries to turn their digital ambitions into reality through hands‑on technical expertise. Based in one of our global locations, you will be part of QuantumBlack AI by McKinsey, a multidisciplinary group of software engineers, AI engineers, data scientists, and technology consultants passionate about creating industry‑shaping products and tools. At McKinsey, you’ll grow as a technologist and leader, work across diverse industries and technologies, and enjoy opportunities to contribute to digital strategies, build impactful products, and mentor others.

YOUR GROWTH

• 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. The real magic happens when you take the input from others to heart and embrace the fast‑paced learning experience, owning your journey.
• 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. We not only encourage diverse perspectives, but they are critical in driving us toward the best possible outcomes.
• 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. Plus, you’ll have the opportunity to learn from exceptional colleagues with diverse backgrounds and experiences.
• 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.

YOUR QUALIFICATIONS AND SKILLS

• Undergraduate or master’s degree; or equivalent experience.
• 2‑5+ years of experience developing full‑stack applications by writing code that is readable, testable, maintainable, and scalable.
• Demonstrated experience working collaboratively with other developers, as well as technical and non‑technical people within software teams.
• Hands‑on experience and willingness to learn across frontend (TypeScript, React, Angular, Vue, Next.js, Tailwind), backend (Python, Node.js, Java/Spring, C#/.NET), and databases (SQL, NoSQL, vector databases, ETL).
• Experience with LLM frameworks, prompt orchestration, agent frameworks, MCPs, evaluation frameworks, and cloud platforms (Azure, AWS, GCP), including Docker and CI/CD.
• Strong focus on automated testing, logging, monitoring, and overall system reliability.
• Experience working in Agile teams, including active participation in sprint ceremonies.
• Experience pair programming collaboratively with other developers.
• Exceptional time management to meet your responsibilities in a complex and largely autonomous work environment.
• Strong communication skills, both verbal and written in English, with the ability to adjust your style to suit different perspectives and seniority levels.