Full-Stack Engineer - Generative AI

We're looking for a data-focused Full-Stack Engineer to help make Citi Assist smarter, safer and better every day. You'll build the systems behind testing, evaluation and feedback - turning real-world data into insights that improve the quality and performance of our AI products. You'll work across the stack, from React and data visualisation to backend services, APIs and data pipelines, owning features end-to-end and helping shape the technical direction of the platform. This is a role for an engineer who enjoys solving complex problems, moves with pace, takes ownership and wants to have a genuine impact on how AI is built and used at scale.,

• Build testing, evaluation and feedback platforms for GenAI products
• Develop full-stack features using TypeScript, React and Python
• Build scalable APIs, backend services and data pipelines
• Design data models and frameworks to measure AI quality and performance
• Create dashboards and visualisations that turn data into actionable insights
• Analyse AI performance and identify opportunities to improve quality
• Own features from concept and design through to production
• Influence architecture, technical direction and engineering standards
• Build with security, resilience, quality and regulatory compliance in mind
• Mentor engineers, share knowledge and help raise the engineering bar Strong experience building and deploying production full-stack applications
• Excellent Python and TypeScript/JavaScript skills
• Strong data engineering, analytics and problem-solving experience
• Proven experience with modern frontend frameworks, ideally React
• Strong SQL and relational database experience, ideally Postgres
• Experience building scalable backend services and APIs
• Experience with Kubernetes/OpenShift and containerised environments
• Strong understanding of CI/CD, automated testing and engineering best practices
• Experience with data visualisation, analytics or experimentation
• Technical leadership, strong ownership and a track record of delivering impact
• Desirable: Experience with GenAI/LLM evaluation, AI safety, prompt engineering, experimentation frameworks or data pipeline technologies such as Airflow or Dagster. Working at Citi is far more than just a job. A career with us means joining a team of approximately 219,000 dedicated people from around the globe. At Citi, you'll have the opportunity to grow your career, give back to your community and make a real impact.

We're building from the ground up, combining the scale and reach of a global bank with the mindset and pace of a technology start-up. You'll work alongside talented engineers and AI specialists, with genuine ownership and the opportunity to shape how Citi builds and adopts GenAI safely and at scale.

Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive.

By joining Citi London, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as:

• 27 days annual leave (plus bank holidays)
• A discretional annual performance related bonus
• Private Medical Care & Life Insurance
• Employee Assistance Program
• Pension Plan
• Paid Parental Leave
• Special discounts for employees, family, and friends