Senior Software Engineer

Why this job is important

As a Senior Software Engineer in our Digital Twins Division, you’ll help build the systems behind one of Kantar’s most ambitious AI products. Your work will enable thousands of AI‐driven “digital twins” to simulate real‐world consumer behaviour in real time, giving brands powerful insight into complex decisions. This role focuses on scalable backend systems, event‐driven architectures, and AI‐enabled platforms, working closely with product, data science and platform teams to turn advanced AI capabilities into reliable, production‐ready systems.

What you’ll be doing

• Designing and building scalable, distributed backend services for AI‐driven applications.
• Building event‐driven systems that process large volumes of behavioural data in real time.
• Developing services in Node.js/TypeScript and/or Python.
• Designing APIs that support high‐throughput, low‐latency workloads.
• Helping orchestrate and optimise AI agent‐based systems running at scale.
• Contributing to technical direction, mentoring others, and continuously improving platform operations.

The skills & experience you’ll bring

• Strong backend engineering experience with cloud‐based systems (Azure, AWS, or GCP).
• Experience designing distributed or event‐driven architectures (Kafka or similar).
• Proficiency in TypeScript/Node.js and/or Python.
• Experience building scalable APIs and microservices.
• Working knowledge of containers and cloud‐native delivery approaches.
• Curiosity about AI‐enabled systems and how they scale responsibly.
• Experience with LLMs, AI agent orchestration, or tools such as RAG, vector databases or LangChain is a bonus.

Benefits

• Flexible hybrid working.
• 25 days leave, 2 days paid for volunteering and life event leave.
• Competitive salary and bonus (bonus dependent on role).
• Company pension.
• Enhanced parental leave.
• Healthcare options.
• Wide range of flexible benefits.

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: Reading, King’s Road, United Kingdom

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.