Overview

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We’re the world’s leading data, insights, and consulting company; we shape the brands of tomorrow by better understanding people everywhere. Kantar’s Profiles division is home to the world’s largest audience network. With access to 170m+ people in over 100 global markets, we offer unrivalled global reach with local relevancy. Validated by industry leading anti-fraud technology, Kantar’s Profiles Audience Network delivers meaningful data with consistency, accuracy, and accountability – all at speed and scale.

We are looking for a talented and experienced Senior Software Engineer to join our team. In this role, you will work across our internal platform to build scalable and robust microservices. You will collaborate closely with product managers and other engineers to deliver performant and well-built APIs. Your expertise in Node, TypeScript, and backend systems will be key to driving impactful projects.

Country: United Kingdom

Why join Kantar?

We shape the brands of tomorrow by better understanding people everywhere. By understanding people, we can understand what drives their decisions, actions, and aspirations on a global scale. And by amplifying our in-depth expertise of human understanding alongside ground-breaking technology, we can help brands find concrete insights that will help them succeed in our fast-paced, ever shifting world. We’re committed to equality of opportunity and supporting our colleagues’ health and wellbeing. Our approach is flexible to ensure everybody feels included and able to win together. We’re dedicated to creating an inclusive culture and value the diversity of our people, clients, suppliers and communities, and we encourage applications from all backgrounds and sections of society.

Seniority level: Mid-Senior level

Employment type: Full-time

Job function: Engineering and Information Technology

Industries: Market Research

Key Responsibilities

• Develop and maintain backend services using modern frameworks.
• Ensure data consistency and scalability with database integrations.

Key Qualifications

• Backend Skills: Experience with TypeScript for strongly typed development.
• Experience building and maintaining scalable backend Node.js services using frameworks like Express.
• Familiarity with database systems (e.g., PostgreSQL, MongoDB) and ORMs (e.g., Prisma, Sequelize).

• (Bonus) Authentication And Security: Hands-on experience with authentication systems like Auth0, Okta, or custom authentication flows.
• Strong understanding of security best practices for web applications.

• Soft Skills: Excellent problem-solving skills and attention to detail; proactive mindset; strong written and verbal communication skills for presenting findings to stakeholders.

Nice-to-Have Skills

• Knowledge of API development with REST or GraphQL.
• Understanding of event-driven architectures and message queues (e.g., Kafka, RabbitMQ).
• Knowledge of performance optimization tools and strategies for backend systems.
• Familiarity with testing frameworks (e.g., Jest, Cypress, Playwright) for unit, integration, and end-to-end testing.
• Familiarity with CI/CD pipelines and DevOps tools (e.g., GitHub Actions, Docker, Kubernetes).
• Exposure to cloud platforms such as AWS, Azure, or GCP.