Senior Software Engineer

Salary: £46,000 - 86,000 per year

Requirements:

• 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, but not essential

Responsibilities:

• Design and build scalable, distributed backend services for AI-driven applications
• Build event-driven systems that process large volumes of behavioural data in real time
• Develop services in Node.js/TypeScript and/or Python
• Design APIs that support high-throughput, low-latency workloads
• Help orchestrate and optimise AI agent-based systems running at scale
• Contribute to technical direction
• Mentor others
• Help continuously improve how we build and operate our platforms

Technologies:

• AI
• AWS
• Azure
• Backend
• Cloud
• GCP
• Support
• Kafka
• Python
• RAG
• TypeScript
• microservices
• NodeJS

More:

We are Kantar, the worlds leading data, insights and consulting company. In our Digital Twins Division, we are building the systems behind one of our most ambitious AI products, enabling thousands of AI-driven digital twins to simulate real-world consumer behaviour in real time and give brands insight into complex decisions. We offer flexible hybrid working, 25 days leave, 2 days paid for volunteering and life event leave, competitive salary and bonus, company pension, enhanced parental leave, healthcare options, and a wide range of flexible benefits. This role is based in Reading, Kings Road, United Kingdom, and we are not able to offer visa sponsorship or relocation support for this role. We also have locations in London, South Bank Central. We are committed to equality of opportunity, inclusion, wellbeing, diversity of thinking, and a fair and supportive working environment.

last updated 36 week of 2026