Senior Lead Software Engineer (Full Stack) - Retail Solutions, London

Build products that shape decisions at the world’s largest retailers.

At Oliver Wyman, we are known globally for helping organisations solve their toughest strategic challenges. Within Oliver Wyman, Retail Solutions is a product‑focused engineering organisation building SaaS solutions that help retailers optimise assortments, pricing, promotions and other critical commercial decisions.

We combine the pace and ownership of a startup with the reach, expertise and client impact of a global consulting firm. We’re looking for a Senior Lead Software Engineer (Full Stack) to join one of our product teams and play a key role in shaping the future of our platform and products.

This is a hands‑on technical leadership role for someone who enjoys solving complex engineering challenges, building scalable cloud‑native systems, and helping teams deliver exceptional software.

What You’ll Do

As a Senior Lead Engineer, you’ll help drive both technical direction and delivery, with your main responsibilities being:

• Lead the design, development and operation of new capabilities across our SaaS products.
• Make architectural decisions that balance immediate business needs with long‑term scalability and maintainability.
• Work closely with product, engineering and business leadership to shape product roadmaps and technical strategy.
• Identify and drive improvements across performance, reliability, scalability, security and developer experience.
• Champion modern engineering practices, including AI‑assisted development tools such as GitHub Copilot.
• Lead the adoption of new patterns, frameworks and platform capabilities across teams.
• Mentor engineers and foster a culture of continuous learning, operational excellence and high‑quality delivery.
• Partner with platform, security and compliance teams to ensure our products meet organisational and regulatory standards.
• Contribute directly to production code and remain deeply involved in technical implementation.

Who We’re Looking For

We’re more interested in strong engineering fundamentals, leadership and problem‑solving capability than a perfect match to every technology in our stack, but you will have:

• 7+ years of software engineering experience.
• Experience as a Senior Engineer, Lead Engineer, Staff Engineer or Software Architect.
• A degree in Computer Science, Engineering, Data Science or a related field (preferred but not essential).
• Certifications such as Azure Solutions Architect or CKA (beneficial but not required).
• Experience working in consulting or client‑facing environments (helpful but not essential).

You’ll Likely Have Experience With

Building and operating modern full‑stack applications using technologies such as JavaScript/TypeScript and Python.

• Frameworks such as Express.js, Vue.js, Flask and Pandas.
• Designing distributed systems, service‑oriented architectures and microservices.
• Cloud‑native development, ideally on Azure.
• Kubernetes‑based platforms and deployment practices.
• AKS and supporting technologies such as ArgoCD, Helm, Dapr and GitOps workflows.
• Database technologies including MongoDB and PostgreSQL.
• DevSecOps, Infrastructure as Code and CI/CD practices.
• Large‑scale data platforms, data warehouses or lakehouses (Databricks experience is advantageous).

Why Join Oliver Wyman Retail Solutions?

Real Impact

Our products support some of the world’s largest retailers in making critical commercial decisions. You’ll see the direct impact of the software you build.

Engineering‑Led Culture

We value strong technical thinking, continuous improvement and collaborative problem‑solving. Great ideas can come from anywhere.

Ownership & Autonomy

You’ll be trusted to make decisions, shape solutions and influence the future direction of our products and platform.

Start‑up Energy, Global Reach

You’ll work within a fast‑growing product organisation backed by the scale, reputation and expertise of Oliver Wyman.

Diverse, International Team

Our engineers are distributed across multiple countries, with strong hubs in the UK and Spain, creating a collaborative and inclusive environment built on learning and shared success.

Interested?

If you’re excited by the challenge of building cloud‑native products at scale, influencing technical strategy, and working with a team that genuinely cares about engineering excellence, we’d love to hear from you.

Marsh Diversity and Inclusion Commitment

Marsh is committed to embracing a diverse, inclusive and flexible work environment. We aim to attract and retain the best people and embrace diversity of age background, civil partnership status, disability, ethnic origin, family duties, gender orientation or expression, gender reassignment, marital status, nationality, parental status, personal or social status, political affiliation, race, religion and beliefs, sex/gender, sexual orientation or expression, skin color, or any other characteristic protected by applicable law. We are an equal opportunities employer. We are committed to providing reasonable adjustments in accordance with applicable law to any candidate with a disability to allow them to fully participate in the recruitment process. If you have a disability that may require reasonable adjustments, please contact us at

Marsh Hybrid Work Commitment

Marsh is committed to hybrid work, which includes the flexibility of working remotely and the collaboration, connections and professional development benefits of working together in the office. All Marsh colleagues are expected to be in their local office or working onsite with clients at least three days per week. Office‑based teams will identify at least one “anchor day” per week on which their full team will be together in person.