Software Development Engineer III (Data & AI)

At Tesco, we're using data and AI to create better experiences for our customers and colleagues every day. As a Software Development Engineer III (Data & AI), you'll play a key role in shaping and delivering the next generation of AI-powered products across the business. Joining our Analytics Engineering team, you'll design, build and scale innovative solutions that combine data, software engineering and Generative AI to solve complex business challenges. Working closely with product, engineering, data science and business teams, you'll take ideas from discovery through to production, creating intelligent experiences that drive real impact at one of the UK's largest retailers. This is an exciting opportunity for an experienced engineer who enjoys solving complex problems, building modern applications and helping shape engineering best practice in a fast-moving AI environment. You will be responsible for You will be responsible for

• Designing, building and operating production-grade Data & AI products that deliver measurable business value.
• Developing GenAI-powered applications, including LLM-based solutions, copilots and agentic workflows that enhance decision making and automation.
• Working closely with Product Managers, Designers, Data Scientists and Engineers to turn business challenges into scalable technical solutions.
• Building and integrating APIs, backend services and user-facing applications to create seamless end-to-end experiences.
• Developing intuitive web applications using React, TypeScript, HTML and CSS.
• Creating reusable AI capabilities, frameworks and engineering patterns that enable the safe and consistent adoption of GenAI across multiple teams.
• Supporting live products, troubleshooting complex issues and driving continuous improvements in reliability, performance and user experience.
• Championing engineering excellence through testing, CI/CD, observability, security and modern software development practices.
• Providing technical leadership through mentoring, design reviews and knowledge sharing.
  
  Significant experience delivering and supporting production software systems in a senior engineering role.Strong backend development experience, preferably using Python or similar technologies.Experience designing and building APIs and distributed applications.Hands-on experience building solutions using Large Language Models (LLMs), AI assistants, copilots or agent-based workflows.Understanding of prompt engineering, evaluation techniques, token optimisation and working with LLMs alongside enterprise data.Experience building modern web applications using React and JavaScript/TypeScript.Strong understanding of HTML, CSS, accessibility and user experience best practices.Experience working across data, backend and frontend technologies within collaborative product teams.Excellent communication and stakeholder management skills, with the ability to explain complex technical concepts to a range of audiences.A passion for building high-quality solutions and continuously improving
engineering standards.


• Annual bonus scheme of up to 20% of base salary.
• Holiday starting at 25 days plus a personal day (plus Bank holidays).
• Private medical insurance.
• 26 weeks maternity and adoption leave (12 months service required at the qualifying date) at full pay, followed by 13 weeks of Statutory Maternity Pay or Statutory Adoption Pay, we also offer 6 weeks fully paid paternity leave.
• Free 24/7 virtual GP service, Employee Assistance Programme (EAP) for you and your family, free access to a range of experts to support your mental wellbeing.