Senior Software Engineer

Kantar is the world’s leading AI-native marketing data and analytics business and an indispensable brand partner to the world’s top companies. We combine the most meaningful attitudinal and behavioural data with deep expertise and advanced analytics to uncover how people think and act. We help clients understand what has happened and why and how to shape the marketing strategies that shape their future.

Kantar 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 Audience Network delivers the most meaningful data with consistency, accuracy, and accountability – all at speed and scale.

Why this role matters

We’re known for our data.

You’ll help us turn it into technology that teams and clients can rely on.

At Kantar, technology plays a critical role in how we deliver trusted insights to the world’s leading brands. As a

Senior Software Engineer , you’ll help build and evolve the core backend services that power our internal platforms, enabling teams across the business to access accurate, timely, and scalable data.

You’ll work on backend systems that need to be dependable and easy to evolve, collaborating closely with product managers and fellow engineers to deliver APIs that are well‑designed, performant, and built with long‑term quality in mind. This is a role where you’ll combine hands‑on engineering with collaboration and influence, shaping both the solutions you build and how the team builds them.

What you’ll be doing

Designing, building, and maintaining

scalable backend services

using

Node.js and TypeScript

Developing robust APIs that support our internal platforms and reporting needs

Working closely with

product and engineering teams

to understand requirements and deliver reliable solutions

Ensuring data is accurate, consistent, and scalable through effective database integrations

Contributing to code quality, performance, and practical engineering standards across the team

The skills and experience you’ll bring

Strong experience building backend services using

Node.js

and

TypeScript

Confidence working with databases such as

PostgreSQL or MongoDB , and ORMs like Prisma or Sequelize

Experience designing and maintaining APIs (REST and/or GraphQL)

An understanding of how to build secure, reliable backend systems

Clear communication skills and a collaborative approach to problem‑solving

Nice to have (but not essential):

Experience with authentication and security concepts

Familiarity with event‑driven systems or messaging tools

Exposure to testing frameworks, CI/CD pipelines, or cloud platforms

What’s in it for you

On top of all your normal benefits like holiday, meal cards and life assurance, we also offer:

Five days of Life Leave per year; for those days when life just…gets in the way.

Birthday leave – one extra day of holiday taken on the nearest workday to your birthday

Two days a year to give back and volunteer with an organisation of your choice.

Enhanced primary and secondary carer leave for however you choose to grow your family.

The chance to hit the beach on your lunch break (yes, we have somewhere you can store your surfboard!)

Please be aware, the majority of our roles are hybrid, working two to three days a week in our office.

We’re not able to offer visa sponsorship or help with relocation support for this role. Please make sure you’ve got the right to work in the country where this role is located before applying.

#J-18808-Ljbffr