Senior Full Stack Engineer (TypeScript)

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

To start a career that is out of the ordinary, please apply...

Job Details

Why this job is important

You'll play a key role in designing and building scalable, high‑quality web applications that are relied on every day. Working across the full stack, you'll take ownership of complex features from idea through to production, influencing technical decisions and shaping how systems are built and improved over time. This role offers the chance to tackle meaningful engineering challenges, balance performance with usability, and make a visible impact through clean, secure, and well‑designed solutions.

What you'll be doing

• Designing and building scalable, event‑driven backend services using TypeScript and Node.js
• Working across the stack, from APIs and data layers through to React‑based frontends
• Collaborating with product partners to shape solutions that meet real user and business needs
• Championing clean, secure, and well‑tested code through reviews and shared standards
• Supporting and mentoring others, contributing to a strong, inclusive engineering culture

What you'll bring

You don't need to tick every box to apply. We're interested in your experience, mindset and willingness to learn.

• Solid experience building backend services with TypeScript, Node.js, and REST APIs
• Experience designing scalable systems, ideally using microservices or event‑driven patterns
• Working knowledge of databases such as PostgreSQL and Redis
• Frontend experience with React
• A collaborative approach and confidence communicating technical ideas clearly

Nice to have, but not essential:

• Experience with authentication and authorisation (e.g. JWT, SSO)
• Exposure to Kafka, RabbitMQ, or similar messaging platforms
• Familiarity with CI/CD, containers, or cloud platforms such as AWS, Azure, or GCP
• Experience with Ruby

What's in it for you

• Flexible hybrid working
• Up to 25 days off, plus your birthday off and two days paid for volunteering
• Meal card and flexible benefits where you are allocated funds to spend on a variety of benefits such as transport cost, education related and more

We are not able to offer visa sponsorship or assist with relocation support for this role. Please ensure you have the right to work in the country where this role is located before applying.

Location

Porto, R. Dom João IPortugal

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 competitive and 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 being is 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.