Senior Software Engineer - C# - (Hybrid Remote) in London

Senior Software Engineer - C# - (Hybrid Remote) in London

London Full-Time No working from home possible
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At a Glance

  • Tasks: Design and build scalable backend systems for AI-driven applications.
  • Company: Join Kantar, a leader in data and insights, shaping the future with creativity.
  • Benefits: Enjoy flexible hybrid working, competitive salary, and generous leave policies.
  • Other info: Be part of a diverse team driving innovation and career growth.
  • Why this job: Make a real impact on AI technology that influences consumer behaviour globally.
  • Qualifications: Strong backend engineering experience with cloud systems and proficiency in TypeScript/Node.js or Python.

We go beyond the obvious, using intelligence, passion and creativity to inspire new thinking and shape the world we live in. Job DetailsWhy this job is importantAs 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 isn't a traditional full‐stack role. You'll focus 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. Your work will directly shape how clients interact with data and insights at scale. What you'll be doingYou'll spend your time designing and building technology that can grow with our ambition, including: Creating scalable, distributed backend services for AI‐driven applicationsBuilding event‐driven systems that process large volumes of behavioural data in real timeDeveloping services in Node.js/TypeScript and/or PythonDesigning APIs that support high‐throughput, low‐latency workloadsHelping orchestrate and optimise AI agent‐based systems running at scaleYou'll also contribute to technical direction, mentor others, and help us continuously improve how we build and operate our platforms. 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 PythonExperience building scalable APIs and microservicesWorking knowledge of containers and cloud‐native delivery approachesCuriosity about AI‐enabled systems and how they scale responsiblyExperience with LLMs, AI agent orchestration, or tools such as RAG, vector databases or LangChain is a bonus, but not essential. What's in it for youFlexible hybrid working25 days leave, 2 days paid for volunteering and life event leaveCompetitive salary and bonus (bonus dependent on role)Company pensionEnhanced parental leaveHealthcare optionsWide range of flexible benefitsWe are not able to offer visa sponsorship or assist with relocation support for this role. 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. 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. London, South Bank CentralType: Full time

Senior Software Engineer - C# - (Hybrid Remote) in London employer: Kantar

Kantar is an exceptional employer, offering a dynamic work environment in London where creativity and intelligence drive meaningful change. With a strong focus on collaboration and employee growth, Kantar provides unique benefits such as Life Leave and Volunteering Days, fostering a culture that values diverse perspectives and encourages innovation. As a Senior Client Director, you'll engage with leading brands in the Consumer Packaged Goods sector, shaping impactful strategies while enjoying a hybrid work model that promotes work-life balance.

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Contact Details:

Kantar Recruitment Team

We think you need these skills to ace Senior Software Engineer - C# - (Hybrid Remote) in London

C#
Backend Engineering
Cloud-based Systems (Azure, AWS, GCP)
Distributed Architectures
Event-driven Architectures (Kafka or similar)
TypeScript
Node.js