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Citi Logo Citi · IT - Software Development

Principal Software Engineer - Margin Technology

United Kingdom, London · Job Posted April 27, 2026
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Job Description

Engineer the future of global finance. At Citi, our Tech team doesn't just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech.

Job Responsibility

  • Working with a group of passionate engineers who build technical solutions to complex business problems
  • Shaping the future of our product and working towards a target state of a fully automated platform with minimal manual interventions
  • Participating in the whole spectrum of building a software solution, closely working with product teams and users
  • Contributing to our vision of building a strong engineering culture within our global teams

Requirements

  • Hands-on professional software development experience
  • Experience of designing distributed systems, microservices, micro-frontend UIs
  • Experience of using cloud services such as AWS and distributed systems such as Kafka, Kubernetes, S3, DynamoDB, MongoDB or any other NoSQL database
  • Experience of following TDD and passionate about clean code principles
  • Proficiency in programming in Java, Python, JavaScript or React
  • Solid understanding and experience of using data structures, algorithms and SQL
  • Able to independently work in fast paced and rapidly changing environment
  • Bachelor's degree in computer science or engineering field involving software programming or systems engineering

Nice to have

  • Experience of working in investment bank or financial services industry
  • Able to apply entrepreneurial approach to software development and problem solving

What we offer

  • Mentorship
  • Continuous learning
  • Flexibility with potential hybrid work opportunities
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