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Full-stack Senior Software Engineer, GenAI Data Products and Platform

https://www.citi.com/ Logo

Citi

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Location:
United Kingdom , London

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

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Job Description:

This is your chance to build the foundational systems for 'Citi Assist', a Generative AI assistant that will reach every Citi employee globally. You'll join us on the ground floor, becoming a core builder on a high-visibility platform that sets the standard for how a global bank adopts this technology safely and at scale.

Job Responsibility:

  • Build the tools that make Assist great
  • Work with data across the full stack
  • Own your features end to end
  • Build with safety and quality in mind
  • Set the technical direction
  • Be a great teammate

Requirements:

  • Strong experience building and deploying production applications across the full stack
  • Proficiency in multiple languages, including Python and TypeScript/JavaScript (experience with Go or Java is a plus)
  • Deep experience working with data—whether that's building data pipelines, designing analytics systems, or creating data-driven products
  • Experience building user-facing features with modern frontend frameworks like React, Vue, or Angular
  • Strong SQL skills and experience with relational databases like Postgres
  • Experience building backend services and APIs that handle data at scale
  • Comfort with containerised environments and cloud infrastructure (we use OpenShift/Kubernetes)
  • Strong understanding of CI/CD pipelines, testing frameworks, and automation
  • Experience with data visualisation tools and techniques
  • A data-driven mindset
  • A solutions-first approach
  • Technical leadership
  • A focus on impact
  • Clear communication and ownership
  • A collaborative spirit

Nice to have:

  • Direct experience building evaluation or testing frameworks for AI/ML systems
  • Experience with LLM evaluation techniques, prompt engineering, or AI safety concepts
  • Experience with data pipeline tools like Apache Airflow, Dagster, or similar
  • Experience with analytics platforms, experimentation frameworks, or A/B testing infrastructure
  • Background in data science, analytics engineering, or similar data-focused roles
  • Contributions to open-source projects in the data or AI space
  • Experience working in highly regulated environments
What we offer:
  • 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

Additional Information:

Job Posted:
February 19, 2026

Employment Type:
Fulltime
Work Type:
Hybrid work
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