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Java (Kotlin) Developer

United Kingdom, London · Job Posted March 04, 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. Prime Brokerage Technology provides solutions that underpin the operations of our clients and traders that provide the foundation of our Prime Finance business. This is an area of great opportunity and is a major growth target for Citi – with technology providing the key to unlock this potential.

Job Responsibility

  • Ownership and delivery on components (Java/Kotlin) within the Core Prime Brokerage platform. Hands-on Development
  • Actively contribute to an agile development, applying and improving skills in Continuous Integration and Continuous Deployment (CI/CD) practices. Implement and maintain developer-led automated testing solutions. Participate in the ongoing refinement of SDLC, agile and DevOps processes
  • Participate in design, planning and estimation discussions within the team
  • Perform detailed analysis of assigned work, breaking work into individual technical tasks
  • Collaborate with business analysts and stakeholders to clarify and refine requirements
  • Create and maintain project and technical documentation
  • Assist in identify potential risks or issues within assigned tasks and communicate them to the team lead
  • Assist in production support by working closely with operations and business teams. Participate in support rotations to diagnose and resolved escalated issues. Contribute to documentation and post-mortem reviews. Implement software enhancements to resolve root-causes and improve reliability, performance and scalability
  • Collaborate as part of a global team on deliveries and engage in peer reviews such as code reviews / pull requests. Coach and mentor junior analysts and grads

Requirements

  • Proven experience in an App Dev role
  • Demonstrated execution capabilities
  • Bachelor’s/University degree or equivalent experience in a similar role
  • Java & Test-Driven Development are essential

Nice to have

  • Experience in any number of additional technologies is advantageous: Kotlin
  • Cloud Technologies (Kubernetes, Open Shift)
  • Messaging Technologies (Kafka, Solace, TIBCO)
  • Database / Data Store / Data Query Technologies (SQL Server, S3)
  • Observability Technologies (OpenTelemetry, Elastic Stack / ELK, Grafana)

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
  • Access to an array of learning and development resources

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