Senior Backend Engineer — Data-Driven APIs (Node.js/TypeScript)

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

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.