Senior Software Engineer

kantar; Bordeaux; Hybrid; EUR 65,000 - 90,000; Full time

Job summary

Kantar is seeking a Senior Software Engineer to design, build and evolve core backend services powering internal platforms. You will deliver scalable APIs, ensure data integrity and work with product and engineering teams to translate requirements into robust solutions.

The role blends hands-on development with collaboration and influence, with a focus on Node.js, TypeScript and modern data stores. This hybrid position requires strong communication and a commitment to long-term software quality.

Qualifications

• Strong experience building backend services with Node.js and TypeScript.
• Experience with PostgreSQL or MongoDB and ORMs (Prisma or Sequelize).
• Experience designing and maintaining REST and/or GraphQL APIs.
• Ability to build secure, reliable backend systems and scale data stores.
• Clear communication and collaborative problem-solving approach.

Responsibilities

• Design, build, and maintain scalable backend services.
• Develop robust APIs supporting internal platforms and reporting needs.
• Collaborate with product and engineering teams to translate requirements into solutions.
• Ensure data accuracy, consistency and scalable integrations.
• Contribute to code quality, performance and engineering standards.

Skills

Node.js

TypeScript

PostgreSQL

MongoDB

Prisma

Sequelize

REST APIs

GraphQL

Security best practices

Communication

Tools

CI/CD pipelines

Cloud platforms

Job description

We go beyond the obvious, using intelligence, passion and creativity to inspire new thinking and shape the world we live in.

Job Details

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 aSenior 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 maintainingscalable backend servicesusingNode.js and TypeScript
• Developing robust APIs that support our internal platforms and reporting needs
• Working closely withproduct and engineering teamsto 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 usingNode.jsandTypeScript
• Confidence working with databases such asPostgreSQL 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 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.

What part of Kantar might I be joining?

You’ll be joining our Profiles division, home to specialists in survey design, sampling and data science. With the world’s largest audience network (over 170 million people), we’re trusted by many of the worlds leading brands to provide amazing insights from real people.

Porto, R. Dom João IPortugal

Location

Kantar Rewards Statement At Kantar we have an integrated way of rewarding our people based around a simple, clear and consistent set of principles. Our approach helps to ensure we are market competitiveand also to support a pay for performance culture, where your reward and career progression opportunities are linked to what you deliver.

We go beyond the obvious, using intelligence, passion and creativity to inspire new thinking and shape the world we live in. Apply for a career that’s out of the ordinary and join us.

We want to create an equality of opportunity in a fair and supportive working environment where people feel included, accepted and are allowed to flourish in a space where their mental health and well beingis taken into consideration.

We want to create a more diverse community to expand our talent pool, be locally representative, drive diversity of thinking and better commercial outcomes.

Kantar is the world’s leading data, insights and consulting company. We understand more about how people think, feel, shop, share, vote and view than anyone else. Combining our expertise in human understanding with advanced technologies, Kantar’s 30,000 people help the world’s leading organisations succeed and grow.