Tesco Retail Media team is transforming how advertisers connect with consumers through personalized and targeted campaigns across retailers' digital and physical touchpoints.

We are seeking a Lead Front-End Engineer to drive excellence in front-end development and user experience for our high-scale SaaS platform. This role will be instrumental in shaping the front-end architecture, defining best practices ensuring high performance, security, and accessibility standards, and mentoring engineers.

You will collaborate closely with backend engineers, product teams, UX designers, and platform engineers to ensure our applications are scalable, resilient, and user-friendly. You will also work with New Relic and Google Lighthouse to monitor front-end performance and observability.

Key Responsibilities

• Technical Leadership: Define and establish front-end engineering best practices, including architecture, performance optimization, and maintainability.
• Front-End Architecture: Design and implement scalable, modular component architectures using ReactJS and optimize UI performance using tools like Google Lighthouse.
• Collaboration with Backend & BFF Teams: Work with backend teams to design API interactions that balance efficiency and security, without overloading the front-end.
• Mentorship & Upskilling: Guide and mentor engineers, establishing a strong front-end culture.
• CI/CD & Deployment: Improve front-end build pipelines, automated deployments, and observability using GitLab and Octopus Deploy.
• User Experience & Accessibility: Ensure the UI is fast, accessible, and intuitive, aligning with UX design best practices.

Required Skills & Experience

• 8+ years of front-end development experience with ReactJS, TypeScript, and JavaScript (ES6+), Design patterns and modern UI frameworks.

• Experience with Micro Frontends architecture and component libraries (e.g., Storybook, Material UI).
• Deep understanding of front-end performance optimization, Core Web Vitals, accessibility (WCAG), Webpack Bundle Analyzer, and React Profiler.
• In-depth knowledge of Webpack, Babel, ESLint, Prettier, and other modern build tools and task runners for optimizing development workflows.
• Experience integrating front-end applications with RESTful APIs and GraphQL.
• Strong knowledge of component-based architectures, and UI state management (Redux, React Query, etc.).
• Hands on automated testing (Jest, Cypress, React Testing Library).
• Experience with styled components and Emotion in ReactJS for modular and scoped CSS-in-JS, enabling efficient and dynamic styling
• Proficiency with Webpack's advanced features like tree-shaking, lazy loading, code-splitting, and bundle optimization.
• Strong collaboration skills to work effectively with cross-functional teams, including back-end engineers, UX designers, and product managers. (must for lead role)

Good to have:

• Experience working in cloud-based SaaS environments, with GCP preferred

• Experience with CI/CD pipelines and deployment automation (GitLab, Octopus Deploy)

• Test-Driven Development (TDD) approach to ensure code reliability and quality in complex projects.

Tesco Media is transforming how advertisers connect with consumers through personalized and targeted campaigns across retailers' digital and physical touchpoints. 
Retail Media Measurement plays a pivotal role in ensuring the effectiveness of these campaigns, driving value for advertisers, retailers, and consumers alike

Our mission: to enable businesses to grow and reimagine themselves by becoming advocates and champions for their customers. With deep heritage and expertise in retail – one of the world’s most competitive markets, with a deluge of multi-dimensional data – dunnhumby today enables businesses all over the world, across industries, to be Customer First.

Dunnhumby helps retailers and brands deliver better experiences through Customer First strategies.

We’re looking for a Full Stack Engineer who expects more from their career. This role offers an opportunity to build scalable, high-performance solutions in the engineering team, enhance code quality and engineering excellence, and contribute to critical architecture decisions within a data-driven environment. 

Responsibilities:

3+ years of hands-on experience in Full Stack development, focusing on performance, scalability, security, and maintainability.
Must have C# hands on experience + PHP hands on is highly desired
Strong proficiency in Frontend tech like React.js/Angular and Javascript.  
Strong proficiency in backend programming language, system design, OOP concepts.
Drive code quality, ensuring adherence to best practices, design patterns, and SOLID principle
Experience with cloud platforms (Google Cloud Platform & Azure), implementing cloud native best practices for scalability, security, and resilience.  
Good to have experience with containerization like Docker
Good to have knowledge in CI/CD automation.



Tesco Media operates at the heart of Tesco, powered by dunnhumby’s data and analytics expertise. While many roles are embedded day‑to‑day in the Tesco and Tesco Media environment, colleagues work across a unique partnership, collaborating closely with Tesco teams, Tesco Media stakeholders and dunnhumby specialists. Success in Tesco Media comes from building strong relationships across all three, bringing together retail scale, media capability and data‑led insight to deliver meaningful outcomes for customers and brands.

Tesco Media is building a world-class, self-serve B2B advertising platform that enables retailers and brands to plan, activate, and measure omnichannel retail media campaigns

Retail Media is transforming how advertisers connect with consumers through personalized and targeted campaigns across retailers' digital and physical touchpoints. Retail Media Measurement plays a pivotal role in ensuring the effectiveness of these campaigns, driving value for advertisers, retailers, and consumers alike

We are looking for a Engineer- SRE with experience in observability and monitoring who can help us keep our large, distributed systems reliable, fast, and running smoothly.
In this role, you will help improve how we build and maintain reliable systems, strengthen system stability, create automation standards, and guide engineering teams on SRE best practices.

You will work closely with platform, backend, security, and product teams to ensure our services are stable, easy to monitor, and always available. You will use tools like Prometheus, Grafana, Elastic, and New Relic to improve system visibility, manage incidents, and boost overall performance.

Key Responsibilities

• Implement monitoring, logging, and tracing for applications, services, and infrastructure.
• Build dashboards and alerts to monitor system health and performance.
• Support production systems and participate in incident response activities.
• Troubleshoot operational issues using logs, metrics, and system diagnostics.
• Work with engineering teams to onboard services into monitoring platforms.
• Assist in defining alert thresholds and reducing unnecessary alert noise.
• Maintain monitoring configurations and ensure operational documentation is up to date.
• Support post-incident reviews and implement improvements in monitoring coverage.
• Automate routine operational tasks where possible.

Required Experience

• 3–5 years of experience in infrastructure operations, monitoring, or Site Reliability Engineering.
• Experience working with Infrastructure as Code tools such as Terraform.
• Familiarity with cloud platforms such as GCP or Azure.
• Understanding of APIs, service monitoring, and system logs.
• Experience supporting production environments and incident response processes.
• Strong written and verbal communication skills with the ability to collaborate across teams.

Preferred Experience

• Experience with observability tools such as Grafana, Prometheus, Splunk, or New Relic.
  
  
• Experience supporting distributed systems or microservices.
• Exposure to automation or scripting for operational tasks.
• Experience working in Media, SaaS, or streaming environments.